diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..2159ccb
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,225 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = sphinx-build
+PAPER         =
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_paper_size=a4
+PAPEROPT_letter = -D latex_paper_size=letter
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+
+.PHONY: help
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html       to make standalone HTML files"
+	@echo "  dirhtml    to make HTML files named index.html in directories"
+	@echo "  singlehtml to make a single large HTML file"
+	@echo "  pickle     to make pickle files"
+	@echo "  json       to make JSON files"
+	@echo "  htmlhelp   to make HTML files and a HTML help project"
+	@echo "  qthelp     to make HTML files and a qthelp project"
+	@echo "  applehelp  to make an Apple Help Book"
+	@echo "  devhelp    to make HTML files and a Devhelp project"
+	@echo "  epub       to make an epub"
+	@echo "  epub3      to make an epub3"
+	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
+	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
+	@echo "  latexpdfja to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  text       to make text files"
+	@echo "  man        to make manual pages"
+	@echo "  texinfo    to make Texinfo files"
+	@echo "  info       to make Texinfo files and run them through makeinfo"
+	@echo "  gettext    to make PO message catalogs"
+	@echo "  changes    to make an overview of all changed/added/deprecated items"
+	@echo "  xml        to make Docutils-native XML files"
+	@echo "  pseudoxml  to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck  to check all external links for integrity"
+	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
+	@echo "  coverage   to run coverage check of the documentation (if enabled)"
+	@echo "  dummy      to check syntax errors of document sources"
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILDDIR)/*
+
+.PHONY: html
+html:
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+
+.PHONY: dirhtml
+dirhtml:
+	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
+
+.PHONY: singlehtml
+singlehtml:
+	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	@echo
+	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
+
+.PHONY: pickle
+pickle:
+	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
+	@echo
+	@echo "Build finished; now you can process the pickle files."
+
+.PHONY: json
+json:
+	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
+	@echo
+	@echo "Build finished; now you can process the JSON files."
+
+.PHONY: htmlhelp
+htmlhelp:
+	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
+	@echo
+	@echo "Build finished; now you can run HTML Help Workshop with the" \
+	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+
+.PHONY: qthelp
+qthelp:
+	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	@echo
+	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/Yaksh.qhcp"
+	@echo "To view the help file:"
+	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/Yaksh.qhc"
+
+.PHONY: applehelp
+applehelp:
+	$(SPHINXBUILD) -b applehelp $(ALLSPHINXOPTS) $(BUILDDIR)/applehelp
+	@echo
+	@echo "Build finished. The help book is in $(BUILDDIR)/applehelp."
+	@echo "N.B. You won't be able to view it unless you put it in" \
+	      "~/Library/Documentation/Help or install it in your application" \
+	      "bundle."
+
+.PHONY: devhelp
+devhelp:
+	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
+	@echo
+	@echo "Build finished."
+	@echo "To view the help file:"
+	@echo "# mkdir -p $$HOME/.local/share/devhelp/Yaksh"
+	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/Yaksh"
+	@echo "# devhelp"
+
+.PHONY: epub
+epub:
+	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	@echo
+	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
+
+.PHONY: epub3
+epub3:
+	$(SPHINXBUILD) -b epub3 $(ALLSPHINXOPTS) $(BUILDDIR)/epub3
+	@echo
+	@echo "Build finished. The epub3 file is in $(BUILDDIR)/epub3."
+
+.PHONY: latex
+latex:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo
+	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
+	@echo "Run \`make' in that directory to run these through (pdf)latex" \
+	      "(use \`make latexpdf' here to do that automatically)."
+
+.PHONY: latexpdf
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: latexpdfja
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+.PHONY: text
+text:
+	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
+	@echo
+	@echo "Build finished. The text files are in $(BUILDDIR)/text."
+
+.PHONY: man
+man:
+	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
+	@echo
+	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
+
+.PHONY: texinfo
+texinfo:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo
+	@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
+	@echo "Run \`make' in that directory to run these through makeinfo" \
+	      "(use \`make info' here to do that automatically)."
+
+.PHONY: info
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+.PHONY: gettext
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+	@echo
+	@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
+
+.PHONY: changes
+changes:
+	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
+	@echo
+	@echo "The overview file is in $(BUILDDIR)/changes."
+
+.PHONY: linkcheck
+linkcheck:
+	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
+	@echo
+	@echo "Link check complete; look for any errors in the above output " \
+	      "or in $(BUILDDIR)/linkcheck/output.txt."
+
+.PHONY: doctest
+doctest:
+	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	@echo "Testing of doctests in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/doctest/output.txt."
+
+.PHONY: coverage
+coverage:
+	$(SPHINXBUILD) -b coverage $(ALLSPHINXOPTS) $(BUILDDIR)/coverage
+	@echo "Testing of coverage in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/coverage/python.txt."
+
+.PHONY: xml
+xml:
+	$(SPHINXBUILD) -b xml $(ALLSPHINXOPTS) $(BUILDDIR)/xml
+	@echo
+	@echo "Build finished. The XML files are in $(BUILDDIR)/xml."
+
+.PHONY: pseudoxml
+pseudoxml:
+	$(SPHINXBUILD) -b pseudoxml $(ALLSPHINXOPTS) $(BUILDDIR)/pseudoxml
+	@echo
+	@echo "Build finished. The pseudo-XML files are in $(BUILDDIR)/pseudoxml."
+
+.PHONY: dummy
+dummy:
+	$(SPHINXBUILD) -b dummy $(ALLSPHINXOPTS) $(BUILDDIR)/dummy
+	@echo
+	@echo "Build finished. Dummy builder generates no files."
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..33bd1b0
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,188 @@
+# -*- coding: utf-8 -*-
+#
+# Configuration file for the Sphinx documentation builder.
+#
+# This file does only contain a selection of the most common options. For a
+# full list see the documentation:
+# http://www.sphinx-doc.org/en/stable/config
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = 'Question Contribution'
+copyright = '2018, Aditya'
+author = 'Aditya'
+
+# The short X.Y version
+version = ''
+# The full version, including alpha/beta/rc tags
+release = '0.1'
+
+
+# -- General configuration ---------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.intersphinx',
+    'sphinx.ext.ifconfig',
+    'sphinx.ext.viewcode',
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+#
+# source_suffix = ['.rst', '.md']
+source_suffix = '.rst'
+
+# The master toctree document.
+master_doc = 'index'
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = None
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path .
+exclude_patterns = []
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'alabaster'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#
+# html_theme_options = {}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# Custom sidebar templates, must be a dictionary that maps document names
+# to template names.
+#
+# The default sidebars (for documents that don't match any pattern) are
+# defined by theme itself.  Builtin themes are using these templates by
+# default: ``['localtoc.html', 'relations.html', 'sourcelink.html',
+# 'searchbox.html']``.
+#
+# html_sidebars = {}
+
+
+# -- Options for HTMLHelp output ---------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'QuestionContributiondoc'
+
+
+# -- Options for LaTeX output ------------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    (master_doc, 'QuestionContribution.tex', 'Question Contribution Documentation',
+     'Aditya', 'manual'),
+]
+
+
+# -- Options for manual page output ------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    (master_doc, 'questioncontribution', 'Question Contribution Documentation',
+     [author], 1)
+]
+
+
+# -- Options for Texinfo output ----------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    (master_doc, 'QuestionContribution', 'Question Contribution Documentation',
+     author, 'QuestionContribution', 'One line description of project.',
+     'Miscellaneous'),
+]
+
+
+# -- Options for Epub output -------------------------------------------------
+
+# Bibliographic Dublin Core info.
+epub_title = project
+epub_author = author
+epub_publisher = author
+epub_copyright = copyright
+
+# The unique identifier of the text. This can be a ISBN number
+# or the project homepage.
+#
+# epub_identifier = ''
+
+# A unique identification for the text.
+#
+# epub_uid = ''
+
+# A list of files that should not be packed into the epub file.
+epub_exclude_files = ['search.html']
+
+
+# -- Extension configuration -------------------------------------------------
+
+# -- Options for intersphinx extension ---------------------------------------
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {'https://docs.python.org/': None}
\ No newline at end of file
diff --git a/docs/images/create_questions.jpg b/docs/images/create_questions.jpg
new file mode 100644
index 0000000..5cc1535
Binary files /dev/null and b/docs/images/create_questions.jpg differ
diff --git a/docs/images/create_testcases.jpg b/docs/images/create_testcases.jpg
new file mode 100644
index 0000000..dd1dc6b
Binary files /dev/null and b/docs/images/create_testcases.jpg differ
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000..077c8f7
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,110 @@
+.. Question Contribution documentation master file, created by
+
+Welcome to Question Contribution's documentation!
+=================================================
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+Basic Instructions
+------------------
+
+    1. Create 5 Python Coding Questions with good quality test cases for each question.(expected 5 test cases).
+    2. Avoid trivial questions such as Printing patterns, Reversing strings, Arithmetic operations, etc.
+    3. Question description should be grammatically correct and easy to understand.
+    4. Questions can be original or adapted from other sources with significant changes in case the question is adapted, the source needs to be cited in the interface. We prefer non-cited, original questions for shortlisting the candidates.
+    5. All questions should be well tested.
+
+
+
+Register & Login
+----------------
+    1. Click on the **Register** link on the |location_link|.
+
+    .. |location_link| raw:: html
+
+        <a href="https://contribute-yaksh.fossee.in/login/" target="_blank">main page</a>
+
+    2. After registration, login with the username and password.
+
+
+Creating Questions
+------------------
+    
+    .. note::  You are allowed to create only 5 questions. You can edit and delete those questions though. Also please make sure questions are created using Python 3.x.
+
+    1. After login click on **Start Contribution** button to start creating questions.
+    2. On the contribution interface you can view all your questions.
+    3. Click on **Add Question** button to create a new question.
+        .. note:: Right click on the image and select **Open image in new tab** to view image properly.
+    4. Below image shows an example of creating a question.
+            .. figure:: images/create_questions.jpg
+
+        Fields to fill while creating questions
+        
+        * **Summary**- Short summary or the name of the question. Cannot be more than 256 characters.
+
+        * **Points** - Points is the marks for a question. It can be in decimal digits.
+
+        * **Description** - Write the actual question here. One can use HTML tags to format question text.
+
+            .. note::  To add code snippets in question description please use html <pre>, <code> and <br> tags.
+
+        * **Solution** - It is the **correct code answer** of the question. Please follow Python syntaxes here.
+            For e.g. :: 
+
+                a = input()
+                b = input()
+                print(int(a)+int(b))
+
+        * **Citation** - Mention the reference url of the question if the question is adapted. Please make sure to cite the original source of the question if it is not a original question.
+
+            .. note:: Leave the field blank if the question is original.
+
+        * **Originality** - Specify whether the question is **Original Question** or **Adapted Question**
+
+    5. Below image shows an example of how to create test cases.
+            .. figure:: images/create_testcases.jpg
+
+        In **Expected input** field, enter the value(s) that will be passed to the code through a standard I/O stream.
+
+            .. note::  If there are multiple input values in a test case, enter the values in a new line as shown in figure.
+
+        In **Expected Output** Field, enter the expected output for that test case. For e.g type 3 if the output of the user code is 3.
+
+        To delete a test case, Select **Delete** checkbox and click on **Check and Save** to delete the testcase and save the question.
+
+        To **add a new test case**, select ``stdio`` from the drop down box, found just above the ``Check and Save`` button.
+
+    6. To delete a question, Select the question and click on **Delete Question** button. Once deleted, a question cannot be retrieved back. Please take caution before deletion.
+    7. If all the test cases for the questions pass, then the question is automatically approved. To see how many questions are approved, you can look at the **status** column in contribution page, where you see all your questions.
+
+    8. If you have created 5 approved questions, **your question creation task is completed.**
+
+Reviewing Questions
+-------------------
+    1. After login, click on **Start Contribution** button to start reviewing questions.
+    2. On the contribution interface you can view all the questions to review.
+    3. Click on the **Question sumary** link to review a question.
+    4. Read the **question description** and try to solve it by writing the solution code. Click on **Check Answer** button to check if your solution passes the question creator's testcases. You will see errors for the testcases that do not pass. Read the errors properly and try to fix your solution.
+    5. You can **skip** the question if you find the following reasons for not being able to solve the question -
+        a. If the question is incomprehensible 
+        b. If the question is comprehensible but its solution is too difficult.
+        c. If the question is comprehensible and its solution is fairly easy, but the testcases provided are wrong for the question.
+    
+    .. note:: If you find any other problem other than the three mentioned reasons, you can add it in the comments field. Otherwise it can be kept blank.
+
+    6. If you are able to solve the question, you will be automatically redirected to the **review submission** page. Here you have to review the following attributes of the question -
+
+        a. Check if the Question summary and description provided are grammatically correct and simple to understand.
+        b. If the marks/points provided by the question creator is worth the question. A really simple question should not have more than single digit marks and really tough question should have atleast high two digit marks.
+        c. Check Citation for the following cases - 
+            1. If the question is stated to be original, please investigate if the question is truly original. Check on the internet to see if the question is directly copied or influenced by a similar question.
+            2. If the question has been cited from a source, please investigate if the cited source is correct or not.
+            3. If the question is not directly copied but is a generic question, like print Armstrong numbers, or factorial of a number or prime number or Fibonacci sequence, please treat the question as original question. But please make sure that you rate the question less.
+        d. Please check **Check Citation** checkbox if the mentioned citation is correct. **Do not check the Check Citation checkbox if an original question is found out to be copied or if a cited source is wrong.** In such a case, please mention the actual source of question in the comments section.
+        e. Rate the question, according to the overall quality, originality and toughness of the question.
+        f. Comment, if you have some insights or problems with the question. Although Comments are optional, they will be appreciated.
+
+    7. Once a review is submitted, you will be taken back to the dashboard. You can always edit your review or submit review for other questions.
diff --git a/interface/admin.py b/interface/admin.py
index adb5ef4..ee25b61 100644
--- a/interface/admin.py
+++ b/interface/admin.py
@@ -1,13 +1,152 @@
-from django.contrib import admin
-from interface.models import Question, MultipleChoiceQuestion, CodeQuestion, Choice, TestCase, Rating, Review, Input, Output
-
-admin.site.register( Question)
-admin.site.register( MultipleChoiceQuestion)
-admin.site.register( CodeQuestion)
-admin.site.register( Choice)
-admin.site.register( TestCase)
-admin.site.register( Rating)
-admin.site.register( Review)
-admin.site.register( Input)
-admin.site.register( Output)
- 
+from django.contrib import admin, messages
+from django.contrib.auth.models import User, Group
+from django.contrib.auth.admin import GroupAdmin
+from django.http import HttpResponse
+from interface.models import Question, TestCase, AverageRating, Review
+from interface.views import submit_to_code_server, is_moderator
+
+admin.site.register(Question)
+admin.site.register(TestCase)
+admin.site.register(AverageRating)
+admin.site.register(Review)
+
+
+class ReviewerAdmin(admin.ModelAdmin):
+    search_fields = ['username' ]
+    actions = ['make_reviewer', 'remove_reviewer']
+
+    def make_reviewer(self, request, users):
+        try:
+            group = Group.objects.get(name="reviewer")
+            group.user_set.add(*users)
+            messages.add_message(request, messages.SUCCESS,
+                                 'Selected users have been added to the group.'
+                                 )
+        except Exception as e:
+            messages.add_message(request, messages.ERROR,
+                                 'You have an error:\n {0}.'.format(e)
+                                 )
+
+
+    def remove_reviewer(self, request, users):
+        try:
+            group = Group.objects.get(name="reviewer")
+            group.user_set.remove(*users)
+            messages.add_message(
+                request, messages.SUCCESS,
+                'Selected users have been removed from the group.'
+                )
+        except Exception as e:
+            messages.add_message(request, messages.ERROR,
+                                 'You have an error:\n {0}.'.format(e)
+                                 )
+
+    make_reviewer.short_description = "Add Users in reviewer Group"
+    remove_reviewer.short_description = "Remove Users from reviewer Group"
+
+class QuestionAdmin(admin.ModelAdmin):
+    search_fields = ['user__username', 'summary']
+    list_display = ["summary", "user", 'status']
+    actions = ["update_question_status"]
+
+    def update_question_status(self, request, questions):
+        try:
+            selected_questions = Question.objects.filter(id__in=questions)
+            for question in selected_questions:
+                result = submit_to_code_server(question.id)
+                if result.get("success"):
+                    question.status = True
+                    question.save()
+                else:
+                    question.status = False
+                    question.save()
+
+            messages.add_message(request, messages.SUCCESS,
+                                 "Question Status successfully updated."
+                                 )
+
+        except Exception as e:
+            messages.add_message(request, messages.ERROR,
+                                 'You have an error:\n {0}.'.format(e)
+                                 )
+
+    update_question_status.short_description = """Check and update
+                                                  question status"""
+
+
+class AverageRatingAdmin(admin.ModelAdmin):
+    search_fields = ['question__summary']
+    list_display = ["question", "avg_moderator_rating",
+                     "avg_peer_rating"
+                     ]
+    ordering = ["-avg_peer_rating"]
+    actions = ["update_ratings", "get_unreviewed_questions"]
+
+    def get_unreviewed_questions(self, request, selected_reviews):
+        users = User.objects.all()
+        qualified = []
+        for user in users:
+            if not is_moderator(user) \
+            and Review.objects.filter(reviewer=user,status=True).count()==10\
+             and Question.objects.filter(user=user, status=True).count()==5:
+                qualified.append(user)
+
+        question = Question.objects.get(id=475)
+        cited_users = []
+        for user in qualified:
+            try:
+                if question.reviews.get(reviewer=user).check_citation == False:
+                    cited_users.append(user)
+            except:
+                pass
+
+        qualified_questions = []
+        for user in cited_users:
+            qualified_questions.extend(
+                Question.objects.filter(user=user,status=True)
+                )
+
+        unreviewed_questions = []
+        for question in qualified_questions:
+            for review in question.reviews.all():
+                if review and is_moderator(review.reviewer)\
+                and review.status:
+                    break
+            else:
+                unreviewed_questions.append(question.id)
+        filename = "unreviewed_questions.txt"
+        content = str(unreviewed_questions)
+        response = HttpResponse(content, content_type='text/plain')
+        response['Content-Disposition'] = 'attachment; filename={0}'.format(filename)
+        return response
+
+    def update_ratings(self, request, questions):
+        try:
+            selected_questions = Question.objects.filter(id__in=questions)
+            for question in selected_questions:
+                ratings,status = AverageRating.objects.get_or_create(
+                                                question=question
+                                                )
+                ratings.set_average_marks()
+            messages.add_message(request, messages.SUCCESS,
+                                 "Ratings updated."
+                                 )
+
+        except Exception as e:
+            messages.add_message(request, messages.ERROR,
+                                 'You have an error:\n {0}.'.format(e)
+                                 )
+
+    update_ratings.short_description = """Update marks for
+                                                   selected questions
+                                                """
+    get_unreviewed_questions.short_description = """Get unreviewed questions
+                                                """
+
+
+admin.site.unregister(User)
+admin.site.register(User, ReviewerAdmin)
+admin.site.unregister(AverageRating)
+admin.site.register(AverageRating, AverageRatingAdmin)
+admin.site.unregister(Question)
+admin.site.register(Question, QuestionAdmin)
diff --git a/interface/forms.py b/interface/forms.py
index 508306d..550c56a 100644
--- a/interface/forms.py
+++ b/interface/forms.py
@@ -1,7 +1,9 @@
 from django import forms
-from models import *
+from interface.models import (Question, Review)
 from django.contrib.auth.models import User
 from django.utils.translation import ugettext_lazy as _
+
+
 class RegistrationForm(forms.Form):
     username = forms.RegexField(regex=r'^\w+$', widget=forms.TextInput(attrs=dict(required=True, max_length=30)), label=_("Username"), error_messages={ 'invalid': _("This value must contain only letters, numbers and underscores.") })
     email = forms.EmailField(widget=forms.TextInput(attrs=dict(required=True, max_length=30)), label=_("Email address"))
@@ -21,56 +23,21 @@ def clean(self):
                 raise forms.ValidationError(_("The two password fields did not match."))
         return self.cleaned_data 
 
-class MultipleChoiceQuestionForm(forms.ModelForm):
-		class Meta:
-			model = MultipleChoiceQuestion
-			fields = [
-					"title",
-					"text",
-					"language",
-					"marks",
-					"status",
-					"no_of_inputs",
-				     ]
-
-class CodeQuestionForm(forms.ModelForm):
-	    class Meta:
-	    	model = CodeQuestion
-	    	fields = [
-	    	       "title",
-	    	       "text",
-	    	       "language",
-	    	       "marks",
-	    	       "status",
-	    	       "function_name",
-	    	 		 ]
-
-class InputForm(forms.ModelForm):
-		class Meta:
-			model = Input
-			fields = [
-					"_type",
-					"value",
-					]
-
-
-class OutputForm(forms.ModelForm):
-		class Meta:
-			model = Output
-			fields = [
-					"_type",
-					"value",
-					]
-
+class QuestionForm(forms.ModelForm):
+    """Creates a form to add or edit a Question."""
+    class Meta:
+        model = Question
+        exclude = ['user', "type", "language", "status", "reviews"]
 
+class SkipForm(forms.ModelForm):
+    """Creates a form to skip question and give reasons for it."""
+    class Meta:
+        model = Review
+        fields = ["reason_for_skip", "comments"]
 
 
-'''class TestCaseForm(forms.ModelForm):
-	    class Meta:
-	    	model = TestCase
-	    	fields = [
-	    	       "no_of_inputs",
-	    	       "no_of_outputs",
-	    	       
-	    	         ]'''
-	    			    	
+class ReviewForm(forms.ModelForm):
+    """Creates a form to skip question and give reasons for it."""
+    class Meta:
+        model = Review
+        fields = ["rating", "comments", "check_citation"]
diff --git a/interface/home.html b/interface/home.html
deleted file mode 100644
index 4268679..0000000
--- a/interface/home.html
+++ /dev/null
@@ -1,18 +0,0 @@
-{% extends "navigation.html" %}
-
-{% block content %}
-<html lang="en">
-<head>
-{% load staticfiles %}
-</head>
-
-<div class="container">
-<center>
-  <h1>Welcome to the interface</h1>
- <p>You should contribute a multiplechoice question and a code question here.You can rate to more than one existing questions.</p>
-  </center>
-</div>
-
-</body>
-</html>
-{% endblock %}
\ No newline at end of file
diff --git a/interface/migrations/0001_initial.py b/interface/migrations/0001_initial.py
index 1e1f480..8c2671b 100644
--- a/interface/migrations/0001_initial.py
+++ b/interface/migrations/0001_initial.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.9 on 2016-06-08 22:04
+# Generated by Django 1.9.5 on 2018-03-09 12:58
 from __future__ import unicode_literals
 
 from django.conf import settings
@@ -16,39 +16,20 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
-        migrations.CreateModel(
-            name='Choice',
-            fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('text', models.TextField(default='')),
-                ('correct', models.BooleanField(default=False)),
-            ],
-        ),
-        migrations.CreateModel(
-            name='Input',
-            fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('_type', models.CharField(default='', max_length=24)),
-                ('value', models.CharField(max_length=24)),
-            ],
-        ),
-        migrations.CreateModel(
-            name='Output',
-            fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('_type', models.CharField(default='', max_length=24)),
-                ('value', models.CharField(max_length=24)),
-            ],
-        ),
         migrations.CreateModel(
             name='Question',
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('title', models.CharField(default='', max_length=50)),
-                ('text', models.TextField(default='')),
-                ('language', models.CharField(choices=[('python', 'Python'), ('bash', 'Bash'), ('c', 'C Language'), ('cpp', 'C++ Language'), ('java', 'Java Language'), ('scilab', 'Scilab')], default='python', max_length=24)),
-                ('marks', models.IntegerField(default=0)),
-                ('status', models.IntegerField(choices=[(1, 'approved'), (0, 'unseen'), (-1, 'discarded')], default=0)),
+                ('summary', models.CharField(max_length=256)),
+                ('description', models.TextField()),
+                ('points', models.FloatField(default=1.0)),
+                ('language', models.CharField(default='python', max_length=24)),
+                ('type', models.CharField(default='code', max_length=24)),
+                ('solution', models.TextField()),
+                ('citation', models.TextField(blank=True, help_text='Please add appropriate citation                                if the question is adapted from elsewhere.', null=True)),
+                ('originality', models.CharField(choices=[('original', 'Original Question'), ('adapted', 'Adapted Question')], default='original', max_length=24)),
+                ('status', models.BooleanField(default=False)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='user', to=settings.AUTH_USER_MODEL)),
             ],
         ),
         migrations.CreateModel(
@@ -56,6 +37,8 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('rate', models.IntegerField(choices=[(1, 'Poor'), (2, 'Average'), (3, 'Good'), (4, 'Verygood'), (5, 'Excellent')], default=3)),
+                ('question', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.Question')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
             ],
         ),
         migrations.CreateModel(
@@ -63,70 +46,33 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('comments', models.CharField(choices=[(1, 'easy'), (2, 'medium'), (3, 'difficult')], max_length=24)),
+                ('question', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.Question')),
+                ('reviewer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
             ],
         ),
         migrations.CreateModel(
             name='TestCase',
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('no_of_inputs', models.IntegerField()),
-                ('no_of_outputs', models.IntegerField()),
+                ('type', models.CharField(default='stdiobasedtestcase', max_length=24)),
             ],
         ),
         migrations.CreateModel(
-            name='CodeQuestion',
+            name='StdIOBasedTestCase',
             fields=[
-                ('question_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='interface.Question')),
-                ('function_name', models.CharField(default=False, max_length=100)),
+                ('testcase_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='interface.TestCase')),
+                ('expected_input', models.TextField(blank=True, default=None, null=True)),
+                ('expected_output', models.TextField(default=None)),
             ],
-            bases=('interface.question',),
-        ),
-        migrations.CreateModel(
-            name='MultipleChoiceQuestion',
-            fields=[
-                ('question_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='interface.Question')),
-                ('no_of_inputs', models.IntegerField(default=4)),
-            ],
-            bases=('interface.question',),
+            bases=('interface.testcase',),
         ),
         migrations.AddField(
             model_name='testcase',
             name='question',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.Question'),
-        ),
-        migrations.AddField(
-            model_name='review',
-            name='question',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.Question'),
-        ),
-        migrations.AddField(
-            model_name='review',
-            name='reviewer',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
-        ),
-        migrations.AddField(
-            model_name='rating',
-            name='question',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.Question'),
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='interface.Question'),
         ),
-        migrations.AddField(
-            model_name='rating',
-            name='user',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
-        ),
-        migrations.AddField(
-            model_name='output',
-            name='test_cases',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.TestCase'),
-        ),
-        migrations.AddField(
-            model_name='input',
-            name='test_cases',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.TestCase'),
-        ),
-        migrations.AddField(
-            model_name='choice',
-            name='question',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.Question'),
+        migrations.AlterUniqueTogether(
+            name='rating',
+            unique_together=set([('user', 'question')]),
         ),
     ]
diff --git a/interface/migrations/0002_auto_20160611_0919.py b/interface/migrations/0002_auto_20160611_0919.py
deleted file mode 100644
index 4002810..0000000
--- a/interface/migrations/0002_auto_20160611_0919.py
+++ /dev/null
@@ -1,26 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9 on 2016-06-11 09:19
-from __future__ import unicode_literals
-
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('interface', '0001_initial'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='choice',
-            name='question',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.MultipleChoiceQuestion'),
-        ),
-        migrations.AlterField(
-            model_name='testcase',
-            name='question',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='interface.CodeQuestion'),
-        ),
-    ]
diff --git a/interface/migrations/0003_auto_20160617_1133.py b/interface/migrations/0003_auto_20160617_1133.py
deleted file mode 100644
index ba97572..0000000
--- a/interface/migrations/0003_auto_20160617_1133.py
+++ /dev/null
@@ -1,30 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9.5 on 2016-06-17 11:33
-from __future__ import unicode_literals
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('interface', '0002_auto_20160611_0919'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='codequestion',
-            name='function_name',
-            field=models.CharField(default=None, max_length=100),
-        ),
-        migrations.AlterField(
-            model_name='input',
-            name='_type',
-            field=models.CharField(choices=[(1, 'integer'), (2, 'float'), (3, 'string'), (4, 'boolean')], max_length=24),
-        ),
-        migrations.AlterField(
-            model_name='output',
-            name='_type',
-            field=models.CharField(choices=[(1, 'integer'), (2, 'float'), (3, 'string'), (4, 'boolean')], max_length=24),
-        ),
-    ]
diff --git a/interface/migrations/0004_auto_20160620_1627.py b/interface/migrations/0004_auto_20160620_1627.py
deleted file mode 100644
index 931b8f9..0000000
--- a/interface/migrations/0004_auto_20160620_1627.py
+++ /dev/null
@@ -1,27 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9.5 on 2016-06-20 16:27
-from __future__ import unicode_literals
-
-from django.conf import settings
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('interface', '0003_auto_20160617_1133'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='rating',
-            name='user',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL, unique=True),
-        ),
-        migrations.AlterField(
-            model_name='review',
-            name='reviewer',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL, unique=True),
-        ),
-    ]
diff --git a/interface/migrations/0005_question_user.py b/interface/migrations/0005_question_user.py
deleted file mode 100644
index 2a17043..0000000
--- a/interface/migrations/0005_question_user.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9.5 on 2016-06-21 17:12
-from __future__ import unicode_literals
-
-from django.conf import settings
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
-        ('interface', '0004_auto_20160620_1627'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='question',
-            name='user',
-            field=models.ForeignKey(default=0, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
-        ),
-    ]
diff --git a/interface/migrations/0006_auto_20160621_2147.py b/interface/migrations/0006_auto_20160621_2147.py
deleted file mode 100644
index 2589db0..0000000
--- a/interface/migrations/0006_auto_20160621_2147.py
+++ /dev/null
@@ -1,35 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9.5 on 2016-06-21 21:47
-from __future__ import unicode_literals
-
-from django.conf import settings
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('interface', '0005_question_user'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='rating',
-            name='user',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
-        ),
-        migrations.AlterField(
-            model_name='review',
-            name='reviewer',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
-        ),
-        migrations.AlterUniqueTogether(
-            name='rating',
-            unique_together=set([('user', 'question')]),
-        ),
-        migrations.AlterUniqueTogether(
-            name='review',
-            unique_together=set([('reviewer', 'question')]),
-        ),
-    ]
diff --git a/interface/migrations/0007_question_avg_rating.py b/interface/migrations/0007_question_avg_rating.py
deleted file mode 100644
index a3785bb..0000000
--- a/interface/migrations/0007_question_avg_rating.py
+++ /dev/null
@@ -1,20 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9.5 on 2016-06-23 16:56
-from __future__ import unicode_literals
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('interface', '0006_auto_20160621_2147'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='question',
-            name='avg_rating',
-            field=models.IntegerField(default=0),
-        ),
-    ]
diff --git a/interface/migrations/0008_auto_20160624_1632.py b/interface/migrations/0008_auto_20160624_1632.py
deleted file mode 100644
index d146d4f..0000000
--- a/interface/migrations/0008_auto_20160624_1632.py
+++ /dev/null
@@ -1,19 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9 on 2016-06-24 16:32
-from __future__ import unicode_literals
-
-from django.db import migrations
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('interface', '0007_question_avg_rating'),
-    ]
-
-    operations = [
-        migrations.AlterUniqueTogether(
-            name='rating',
-            unique_together=set([]),
-        ),
-    ]
diff --git a/interface/migrations/0009_auto_20160624_1640.py b/interface/migrations/0009_auto_20160624_1640.py
deleted file mode 100644
index 6ad38e8..0000000
--- a/interface/migrations/0009_auto_20160624_1640.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# -*- coding: utf-8 -*-
-# Generated by Django 1.9 on 2016-06-24 16:40
-from __future__ import unicode_literals
-
-from django.db import migrations
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('interface', '0008_auto_20160624_1632'),
-    ]
-
-    operations = [
-        migrations.AlterUniqueTogether(
-            name='rating',
-            unique_together=set([('user', 'question')]),
-        ),
-        migrations.AlterUniqueTogether(
-            name='review',
-            unique_together=set([]),
-        ),
-    ]
diff --git a/interface/models.py b/interface/models.py
index 06eea42..2223bf4 100644
--- a/interface/models.py
+++ b/interface/models.py
@@ -1,143 +1,169 @@
 from __future__ import unicode_literals
-from django.contrib.auth.models import User
+from django.contrib.auth.models import User, Group
 from django.db import models
+import json
 
-language = (
-        ("python", "Python"),
-        ("bash", "Bash"),
-        ("c", "C Language"),
-        ("cpp", "C++ Language"),
-        ("java", "Java Language"),
-        ("scilab", "Scilab"),
-    )
-
-
-question_types = (
-        ("mcq", "Multiple Choice"),
-        ("mcc", "Multiple Correct Choices"),
-        ("code", "Code"),
-    )
-
-test_case_types = (
-        ("standardtestcase", "Standard Testcase"),
-        ("stdoutbasedtestcase", "Stdout Based Testcase"),
-        ("mcqtestcase", "MCQ Testcase"),
-    )
-
-question_status_choice = (
-        (1, "approved"),
-        (0, "unseen"),
-        (-1, "discarded"),
-        )
 
-level = (
-		(1, "easy"),
-		(2, "medium"),
-		(3, "difficult"),
-		)
+question_skip_choices = (
+        (1, "Question doesn't make sense."),
+        (2, "Question makes sense, but is too difficult to solve."),
+        (3, "Question is correct, but the test cases are wrong."),
+        )
 
 rating_choice = (
         (1, "Poor"),
         (2, "Average"),
         (3, "Good"),
-        (4, "Verygood"),
+        (4, "Very Good"),
         (5, "Excellent"),
-	    )
-types = (
-		(1, "integer"),
-		(2, "float"),
-		(3, "string"),
-		(4, "boolean"),
-		)
+        )
+
+originality = (
+        ("original", "Original Question"),
+        ("adapted", "Adapted Question"),
+        )
+
 
 class Question(models.Model):
-	title = models.CharField(max_length=50, default="")
-	text = models.TextField(default="")
-	language = models.CharField(max_length=24, choices=language, default='python')
-	marks = models.IntegerField(default=0)
-	status = models.IntegerField(default=0, choices=question_status_choice)
-	user = models.ForeignKey(User,default=0)
-	avg_rating=models.IntegerField(default=0)
-	
-	def __str__(self):
-		return  self.text
-	
-	def approve(self):
-		self.status=1
-	
-	def disapprove(self):
-		self.status=0
-
-class MultipleChoiceQuestion(Question):
-	no_of_inputs = models.IntegerField(default=4)
-	
-	def __str__(self):
-	    return  self.text
-	    
-class Choice(models.Model):
-    text = models.TextField(default='')
-    question = models.ForeignKey(MultipleChoiceQuestion)
-    correct = models.BooleanField(default=False)
-    
+    """Question for a quiz."""
+
+    # A one-line summary of the question.
+    summary = models.CharField(max_length=256)
+
+    # The question text, should be valid HTML.
+    description = models.TextField()
+
+    # Number of points for the question.
+    points = models.FloatField(default=1.0)
+
+    # The language for question.
+    language = models.CharField(max_length=24,
+                                default="python")
+
+    # The type of question.
+    type = models.CharField(max_length=24, default="code")
+
+    # user for particular question
+    user = models.ForeignKey(User, related_name="user")
+
+    # solution for question
+    solution = models.TextField()
+
+    # If the question is cited
+    citation = models.TextField(null=True, blank=True,
+                                help_text="Please add appropriate citation\
+                                if the question is adapted from elsewhere."
+                                )
+
+    # originality of the question
+    originality = models.CharField(max_length=24, choices=originality, default="original")
+
+    #status of question
+    status = models.BooleanField(default=False)
+
+    # All reviews for the question
+    reviews = models.ManyToManyField("Review")
+
     def __str__(self):
-    	return self.text   
+        return  self.summary
+    
+    def _get_test_cases(self):
+        tc_list = [tc.stdiobasedtestcase for tc in TestCase.objects.filter(question=self)]
+        return tc_list
+
+    def consolidate_answer_data(self, user_answer, user=None):
+        question_data = {}
+        metadata = {}
+        test_case_data = []
+
+        test_cases = self._get_test_cases()
 
+        for test in test_cases:
+            test_case_as_dict = test.get_field_value()
+            test_case_data.append(test_case_as_dict)
+
+        question_data['test_case_data'] = test_case_data
+        metadata['user_answer'] = user_answer
+        metadata['language'] = self.language
+        metadata['partial_grading'] = False
+        question_data['metadata'] = metadata
+        return json.dumps(question_data)
 
-class CodeQuestion(Question):
-	function_name = models.CharField(max_length=100, default=None)
-	
-	def __str__(self):
-		return str(self.text)
 
 class TestCase(models.Model):
-	
-	no_of_inputs = models.IntegerField()
-	no_of_outputs = models.IntegerField()
-	question = models.ForeignKey(CodeQuestion)
-	
-	
-	def __str__(self):
-		return str(self.id)
-	
-
-class Rating(models.Model):
-	user = models.ForeignKey(User)
-	question = models.ForeignKey(Question)
-	rate = models.IntegerField(default=3, choices=rating_choice)
-	
-	def __str__(self):	
-		return str(self.user)
-		
-	class Meta:
-		unique_together = ('user', 'question',) 
+    question = models.ForeignKey(Question, blank=True, null=True)
+    type = models.CharField(max_length=24, default="stdiobasedtestcase")
+
+
+class StdIOBasedTestCase(TestCase):
+    expected_input = models.TextField(default=None, blank=True, null=True)
+    expected_output = models.TextField(default=None)
+
+    def get_field_value(self):
+        return {"test_case_type": "stdiobasedtestcase",
+                "expected_output": self.expected_output,
+                "expected_input": self.expected_input,
+                "weight": 1
+                }
+
+    def __str__(self):
+        return u'StdIO Based Testcase | Exp. Output: {0} | Exp. Input: {1}'.\
+            format(
+                self.expected_output, self.expected_input
+            )
+
+
+class AverageRating(models.Model):
+    # Average Rating by moderators and peers for a question.
+    question = models.ForeignKey(Question)
+    avg_moderator_rating = models.FloatField(default=0.0)
+    avg_peer_rating = models.FloatField(default=0.0)
+
+    def __str__(self):  
+        return "Average Rating for {0}".format(self.question.summary)
+
+    def set_average_marks(self):
+        reviews = self.question.reviews.all()
+        mod_marks, reviewer_marks = [],[]
+        for review in reviews:
+            if review.status and review.correct_answer:
+                if review.reviewer.groups.filter(name='moderator').exists():
+                    mod_marks.append(review.rating)
+                elif review.reviewer.groups.filter(name='reviewer').exists():
+                    reviewer_marks.append(review.rating)
+        if mod_marks:
+            self.avg_moderator_rating = round(
+                                        sum(mod_marks)/len(mod_marks), 2
+                                        )
+        if reviewer_marks:
+            self.avg_peer_rating = round(
+                                    sum(reviewer_marks)/len(reviewer_marks),2
+                                    )
+        self.save()
+        return self.avg_moderator_rating, self.avg_peer_rating
+
 
 class Review(models.Model):
-	reviewer = models.ForeignKey(User)
-	question = models.ForeignKey(Question)
-	comments = models.CharField(max_length=24, choices=level)
-	
-	def __str__(self):	
-		return str(self.reviewer)
-	
-	def update_review(self,new_comments):
-		self.comments=new_comments
-	#class Meta:
-	#	unique_together = ('reviewer', 'question',) 
-
-
-
-class Input(models.Model):
-	_type = models.CharField(max_length=24, choices=types)
-	value = models.CharField(max_length=24)
-	test_cases = models.ForeignKey('TestCase')
-	
-	def __str__(self):
-		return str(self._type) +"+"+ str(self.value)
-
-class Output(models.Model):
-	_type = models.CharField(max_length=24, choices=types)
-	value = models.CharField(max_length=24)
-	test_cases = models.ForeignKey('TestCase')
-	
-	def __str__(self):
-		return str(self._type) +"+"+ str(self.value)
+    reviewer = models.ForeignKey(User)
+    rating = models.IntegerField(default=3, choices=rating_choice)
+    comments = models.TextField(null=True, blank=True)
+    check_citation = models.BooleanField(default=False,
+                                         help_text="""(Check if the citation 
+                                                   provided is correct or not)
+                                                   """
+                                         )
+    reason_for_skip = models.IntegerField(blank=True, null=True,
+                                          choices=question_skip_choices
+                                          )
+    skipped = models.BooleanField(default=False)
+    status = models.BooleanField(default=False)
+    last_answer = models.TextField(null=True, blank=True)
+    correct_answer = models.BooleanField(default=False)
+
+    def __str__(self):  
+        return "Review by {0}".format(self.reviewer.username)
+
+
+class QuestionBank(models.Model):
+    user = models.ForeignKey(User)
+    question_bank = models.ManyToManyField(Question)
diff --git a/interface/static/admin/css/base.css b/interface/static/admin/css/base.css
new file mode 100644
index 0000000..a37555a
--- /dev/null
+++ b/interface/static/admin/css/base.css
@@ -0,0 +1,967 @@
+/*
+    DJANGO Admin styles
+*/
+
+@import url(fonts.css);
+
+body {
+    margin: 0;
+    padding: 0;
+    font-size: 14px;
+    font-family: "Roboto","Lucida Grande","DejaVu Sans","Bitstream Vera Sans",Verdana,Arial,sans-serif;
+    color: #333;
+    background: #fff;
+}
+
+/* LINKS */
+
+a:link, a:visited {
+    color: #447e9b;
+    text-decoration: none;
+}
+
+a:focus, a:hover {
+    color: #036;
+}
+
+a:focus {
+    text-decoration: underline;
+}
+
+a img {
+    border: none;
+}
+
+a.section:link, a.section:visited {
+    color: #fff;
+    text-decoration: none;
+}
+
+a.section:focus, a.section:hover {
+    text-decoration: underline;
+}
+
+/* GLOBAL DEFAULTS */
+
+p, ol, ul, dl {
+    margin: .2em 0 .8em 0;
+}
+
+p {
+    padding: 0;
+    line-height: 140%;
+}
+
+h1,h2,h3,h4,h5 {
+    font-weight: bold;
+}
+
+h1 {
+    margin: 0 0 20px;
+    font-weight: 300;
+    font-size: 20px;
+    color: #666;
+}
+
+h2 {
+    font-size: 16px;
+    margin: 1em 0 .5em 0;
+}
+
+h2.subhead {
+    font-weight: normal;
+    margin-top: 0;
+}
+
+h3 {
+    font-size: 14px;
+    margin: .8em 0 .3em 0;
+    color: #666;
+    font-weight: bold;
+}
+
+h4 {
+    font-size: 12px;
+    margin: 1em 0 .8em 0;
+    padding-bottom: 3px;
+}
+
+h5 {
+    font-size: 10px;
+    margin: 1.5em 0 .5em 0;
+    color: #666;
+    text-transform: uppercase;
+    letter-spacing: 1px;
+}
+
+ul li {
+    list-style-type: square;
+    padding: 1px 0;
+}
+
+li ul {
+    margin-bottom: 0;
+}
+
+li, dt, dd {
+    font-size: 13px;
+    line-height: 20px;
+}
+
+dt {
+    font-weight: bold;
+    margin-top: 4px;
+}
+
+dd {
+    margin-left: 0;
+}
+
+form {
+    margin: 0;
+    padding: 0;
+}
+
+fieldset {
+    margin: 0;
+    padding: 0;
+    border: none;
+    border-top: 1px solid #eee;
+}
+
+blockquote {
+    font-size: 11px;
+    color: #777;
+    margin-left: 2px;
+    padding-left: 10px;
+    border-left: 5px solid #ddd;
+}
+
+code, pre {
+    font-family: "Bitstream Vera Sans Mono", Monaco, "Courier New", Courier, monospace;
+    color: #666;
+    font-size: 12px;
+}
+
+pre.literal-block {
+    margin: 10px;
+    background: #eee;
+    padding: 6px 8px;
+}
+
+code strong {
+    color: #930;
+}
+
+hr {
+    clear: both;
+    color: #eee;
+    background-color: #eee;
+    height: 1px;
+    border: none;
+    margin: 0;
+    padding: 0;
+    font-size: 1px;
+    line-height: 1px;
+}
+
+/* TEXT STYLES & MODIFIERS */
+
+.small {
+    font-size: 11px;
+}
+
+.tiny {
+    font-size: 10px;
+}
+
+p.tiny {
+    margin-top: -2px;
+}
+
+.mini {
+    font-size: 10px;
+}
+
+p.mini {
+    margin-top: -3px;
+}
+
+.help, p.help, form p.help {
+    font-size: 11px;
+    color: #999;
+}
+
+.help-tooltip {
+    cursor: help;
+}
+
+p img, h1 img, h2 img, h3 img, h4 img, td img {
+    vertical-align: middle;
+}
+
+.quiet, a.quiet:link, a.quiet:visited {
+    color: #999;
+    font-weight: normal;
+}
+
+.float-right {
+    float: right;
+}
+
+.float-left {
+    float: left;
+}
+
+.clear {
+    clear: both;
+}
+
+.align-left {
+    text-align: left;
+}
+
+.align-right {
+    text-align: right;
+}
+
+.example {
+    margin: 10px 0;
+    padding: 5px 10px;
+    background: #efefef;
+}
+
+.nowrap {
+    white-space: nowrap;
+}
+
+/* TABLES */
+
+table {
+    border-collapse: collapse;
+    border-color: #ccc;
+}
+
+td, th {
+    font-size: 13px;
+    line-height: 16px;
+    border-bottom: 1px solid #eee;
+    vertical-align: top;
+    padding: 8px;
+    font-family: "Roboto", "Lucida Grande", Verdana, Arial, sans-serif;
+}
+
+th {
+    font-weight: 600;
+    text-align: left;
+}
+
+thead th,
+tfoot td {
+    color: #666;
+    padding: 5px 10px;
+    font-size: 11px;
+    background: #fff;
+    border: none;
+    border-top: 1px solid #eee;
+    border-bottom: 1px solid #eee;
+}
+
+tfoot td {
+    border-bottom: none;
+    border-top: 1px solid #eee;
+}
+
+tr.alt {
+    background: #f6f6f6;
+}
+
+.row1 {
+    background: #fff;
+}
+
+.row2 {
+    background: #f9f9f9;
+}
+
+/* SORTABLE TABLES */
+
+thead th {
+    padding: 5px 10px;
+    line-height: normal;
+    text-transform: uppercase;
+    background: #f6f6f6;
+}
+
+thead th a:link, thead th a:visited {
+    color: #666;
+}
+
+thead th.sorted {
+    background: #eee;
+}
+
+thead th.sorted .text {
+    padding-right: 42px;
+}
+
+table thead th .text span {
+    padding: 8px 10px;
+    display: block;
+}
+
+table thead th .text a {
+    display: block;
+    cursor: pointer;
+    padding: 8px 10px;
+}
+
+table thead th .text a:focus, table thead th .text a:hover {
+    background: #eee;
+}
+
+thead th.sorted a.sortremove {
+    visibility: hidden;
+}
+
+table thead th.sorted:hover a.sortremove {
+    visibility: visible;
+}
+
+table thead th.sorted .sortoptions {
+    display: block;
+    padding: 9px 5px 0 5px;
+    float: right;
+    text-align: right;
+}
+
+table thead th.sorted .sortpriority {
+    font-size: .8em;
+    min-width: 12px;
+    text-align: center;
+    vertical-align: 3px;
+    margin-left: 2px;
+    margin-right: 2px;
+}
+
+table thead th.sorted .sortoptions a {
+    position: relative;
+    width: 14px;
+    height: 14px;
+    display: inline-block;
+    background: url(../img/sorting-icons.svg) 0 0 no-repeat;
+    background-size: 14px auto;
+}
+
+table thead th.sorted .sortoptions a.sortremove {
+    background-position: 0 0;
+}
+
+table thead th.sorted .sortoptions a.sortremove:after {
+    content: '\\';
+    position: absolute;
+    top: -6px;
+    left: 3px;
+    font-weight: 200;
+    font-size: 18px;
+    color: #999;
+}
+
+table thead th.sorted .sortoptions a.sortremove:focus:after,
+table thead th.sorted .sortoptions a.sortremove:hover:after {
+    color: #447e9b;
+}
+
+table thead th.sorted .sortoptions a.sortremove:focus,
+table thead th.sorted .sortoptions a.sortremove:hover {
+    background-position: 0 -14px;
+}
+
+table thead th.sorted .sortoptions a.ascending {
+    background-position: 0 -28px;
+}
+
+table thead th.sorted .sortoptions a.ascending:focus,
+table thead th.sorted .sortoptions a.ascending:hover {
+    background-position: 0 -42px;
+}
+
+table thead th.sorted .sortoptions a.descending {
+    top: 1px;
+    background-position: 0 -56px;
+}
+
+table thead th.sorted .sortoptions a.descending:focus,
+table thead th.sorted .sortoptions a.descending:hover {
+    background-position: 0 -70px;
+}
+
+/* FORM DEFAULTS */
+
+input, textarea, select, .form-row p, form .button {
+    margin: 2px 0;
+    padding: 2px 3px;
+    vertical-align: middle;
+    font-family: "Roboto", "Lucida Grande", Verdana, Arial, sans-serif;
+    font-weight: normal;
+    font-size: 13px;
+}
+
+textarea {
+    vertical-align: top;
+}
+
+input[type=text], input[type=password], input[type=email], input[type=url],
+input[type=number], textarea, select, .vTextField {
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    padding: 5px 6px;
+    margin-top: 0;
+}
+
+input[type=text]:focus, input[type=password]:focus, input[type=email]:focus,
+input[type=url]:focus, input[type=number]:focus, textarea:focus, select:focus,
+.vTextField:focus {
+    border-color: #999;
+}
+
+select {
+    height: 30px;
+}
+
+select[multiple] {
+    min-height: 150px;
+}
+
+/* FORM BUTTONS */
+
+.button, input[type=submit], input[type=button], .submit-row input, a.button {
+    background: #79aec8;
+    padding: 10px 15px;
+    border: none;
+    border-radius: 4px;
+    color: #fff;
+    cursor: pointer;
+}
+
+a.button {
+    padding: 4px 5px;
+}
+
+.button:active, input[type=submit]:active, input[type=button]:active,
+.button:focus, input[type=submit]:focus, input[type=button]:focus,
+.button:hover, input[type=submit]:hover, input[type=button]:hover {
+    background: #609ab6;
+}
+
+.button[disabled], input[type=submit][disabled], input[type=button][disabled] {
+    opacity: 0.4;
+}
+
+.button.default, input[type=submit].default, .submit-row input.default {
+    float: right;
+    border: none;
+    font-weight: 400;
+    background: #417690;
+}
+
+.button.default:active, input[type=submit].default:active,
+.button.default:focus, input[type=submit].default:focus,
+.button.default:hover, input[type=submit].default:hover {
+    background: #205067;
+}
+
+.button[disabled].default,
+input[type=submit][disabled].default,
+input[type=button][disabled].default {
+    opacity: 0.4;
+}
+
+
+/* MODULES */
+
+.module {
+    border: none;
+    margin-bottom: 30px;
+    background: #fff;
+}
+
+.module p, .module ul, .module h3, .module h4, .module dl, .module pre {
+    padding-left: 10px;
+    padding-right: 10px;
+}
+
+.module blockquote {
+    margin-left: 12px;
+}
+
+.module ul, .module ol {
+    margin-left: 1.5em;
+}
+
+.module h3 {
+    margin-top: .6em;
+}
+
+.module h2, .module caption, .inline-group h2 {
+    margin: 0;
+    padding: 8px;
+    font-weight: 400;
+    font-size: 13px;
+    text-align: left;
+    background: #79aec8;
+    color: #fff;
+}
+
+.module caption,
+.inline-group h2 {
+    font-size: 12px;
+    letter-spacing: 0.5px;
+    text-transform: uppercase;
+}
+
+.module table {
+    border-collapse: collapse;
+}
+
+/* MESSAGES & ERRORS */
+
+ul.messagelist {
+    padding: 0;
+    margin: 0;
+}
+
+ul.messagelist li {
+    display: block;
+    font-weight: 400;
+    font-size: 13px;
+    padding: 10px 10px 10px 65px;
+    margin: 0 0 10px 0;
+    background: #dfd url(../img/icon-yes.svg) 40px 12px no-repeat;
+    background-size: 16px auto;
+    color: #333;
+}
+
+ul.messagelist li.warning {
+    background: #ffc url(../img/icon-alert.svg) 40px 14px no-repeat;
+    background-size: 14px auto;
+}
+
+ul.messagelist li.error {
+    background: #ffefef url(../img/icon-no.svg) 40px 12px no-repeat;
+    background-size: 16px auto;
+}
+
+.errornote {
+    font-size: 14px;
+    font-weight: 700;
+    display: block;
+    padding: 10px 12px;
+    margin: 0 0 10px 0;
+    color: #ba2121;
+    border: 1px solid #ba2121;
+    border-radius: 4px;
+    background-color: #fff;
+    background-position: 5px 12px;
+}
+
+ul.errorlist {
+    margin: 0 0 4px;
+    padding: 0;
+    color: #ba2121;
+    background: #fff;
+}
+
+ul.errorlist li {
+    font-size: 13px;
+    display: block;
+    margin-bottom: 4px;
+}
+
+ul.errorlist li:first-child {
+    margin-top: 0;
+}
+
+ul.errorlist li a {
+    color: inherit;
+    text-decoration: underline;
+}
+
+td ul.errorlist {
+    margin: 0;
+    padding: 0;
+}
+
+td ul.errorlist li {
+    margin: 0;
+}
+
+.form-row.errors {
+    margin: 0;
+    border: none;
+    border-bottom: 1px solid #eee;
+    background: none;
+}
+
+.form-row.errors ul.errorlist li {
+    padding-left: 0;
+}
+
+.errors input, .errors select, .errors textarea {
+    border: 1px solid #ba2121;
+}
+
+div.system-message {
+    background: #ffc;
+    margin: 10px;
+    padding: 6px 8px;
+    font-size: .8em;
+}
+
+div.system-message p.system-message-title {
+    padding: 4px 5px 4px 25px;
+    margin: 0;
+    color: #c11;
+    background: #ffefef url(../img/icon-no.svg) 5px 5px no-repeat;
+}
+
+.description {
+    font-size: 12px;
+    padding: 5px 0 0 12px;
+}
+
+/* BREADCRUMBS */
+
+div.breadcrumbs {
+    background: #79aec8;
+    padding: 10px 40px;
+    border: none;
+    font-size: 14px;
+    color: #c4dce8;
+    text-align: left;
+}
+
+div.breadcrumbs a {
+    color: #fff;
+}
+
+div.breadcrumbs a:focus, div.breadcrumbs a:hover {
+    color: #c4dce8;
+}
+
+/* ACTION ICONS */
+
+.addlink {
+    padding-left: 16px;
+    background: url(../img/icon-addlink.svg) 0 1px no-repeat;
+}
+
+.changelink, .inlinechangelink {
+    padding-left: 16px;
+    background: url(../img/icon-changelink.svg) 0 1px no-repeat;
+}
+
+.deletelink {
+    padding-left: 16px;
+    background: url(../img/icon-deletelink.svg) 0 1px no-repeat;
+}
+
+a.deletelink:link, a.deletelink:visited {
+    color: #CC3434;
+}
+
+a.deletelink:focus, a.deletelink:hover {
+    color: #993333;
+    text-decoration: none;
+}
+
+/* OBJECT TOOLS */
+
+.object-tools {
+    font-size: 10px;
+    font-weight: bold;
+    padding-left: 0;
+    float: right;
+    position: relative;
+    margin-top: -48px;
+}
+
+.form-row .object-tools {
+    margin-top: 5px;
+    margin-bottom: 5px;
+    float: none;
+    height: 2em;
+    padding-left: 3.5em;
+}
+
+.object-tools li {
+    display: block;
+    float: left;
+    margin-left: 5px;
+    height: 16px;
+}
+
+.object-tools a {
+    border-radius: 15px;
+}
+
+.object-tools a:link, .object-tools a:visited {
+    display: block;
+    float: left;
+    padding: 3px 12px;
+    background: #999;
+    font-weight: 400;
+    font-size: 11px;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+    color: #fff;
+}
+
+.object-tools a:focus, .object-tools a:hover {
+    background-color: #417690;
+}
+
+.object-tools a:focus{
+    text-decoration: none;
+}
+
+.object-tools a.viewsitelink, .object-tools a.golink,.object-tools a.addlink {
+    background-repeat: no-repeat;
+    background-position: 93% center;
+    padding-right: 26px;
+}
+
+.object-tools a.viewsitelink, .object-tools a.golink {
+    background-image: url(../img/tooltag-arrowright.svg);
+}
+
+.object-tools a.addlink {
+    background-image: url(../img/tooltag-add.svg);
+}
+
+/* OBJECT HISTORY */
+
+table#change-history {
+    width: 100%;
+}
+
+table#change-history tbody th {
+    width: 16em;
+}
+
+/* PAGE STRUCTURE */
+
+#container {
+    position: relative;
+    width: 100%;
+    min-width: 980px;
+    padding: 0;
+}
+
+#content {
+    padding: 20px 40px;
+}
+
+.dashboard #content {
+    width: 600px;
+}
+
+#content-main {
+    float: left;
+    width: 100%;
+}
+
+#content-related {
+    float: right;
+    width: 260px;
+    position: relative;
+    margin-right: -300px;
+}
+
+#footer {
+    clear: both;
+    padding: 10px;
+}
+
+/* COLUMN TYPES */
+
+.colMS {
+    margin-right: 300px;
+}
+
+.colSM {
+    margin-left: 300px;
+}
+
+.colSM #content-related {
+    float: left;
+    margin-right: 0;
+    margin-left: -300px;
+}
+
+.colSM #content-main {
+    float: right;
+}
+
+.popup .colM {
+    width: auto;
+}
+
+/* HEADER */
+
+#header {
+    width: auto;
+    height: 40px;
+    padding: 10px 40px;
+    background: #417690;
+    line-height: 40px;
+    color: #ffc;
+    overflow: hidden;
+}
+
+#header a:link, #header a:visited {
+    color: #fff;
+}
+
+#header a:focus , #header a:hover {
+    text-decoration: underline;
+}
+
+#branding {
+    float: left;
+}
+
+#branding h1 {
+    padding: 0;
+    margin: 0 20px 0 0;
+    font-weight: 300;
+    font-size: 24px;
+    color: #f5dd5d;
+}
+
+#branding h1, #branding h1 a:link, #branding h1 a:visited {
+    color: #f5dd5d;
+}
+
+#branding h2 {
+    padding: 0 10px;
+    font-size: 14px;
+    margin: -8px 0 8px 0;
+    font-weight: normal;
+    color: #ffc;
+}
+
+#branding a:hover {
+    text-decoration: none;
+}
+
+#user-tools {
+    float: right;
+    padding: 0;
+    margin: 0 0 0 20px;
+    font-weight: 300;
+    font-size: 11px;
+    letter-spacing: 0.5px;
+    text-transform: uppercase;
+    text-align: right;
+}
+
+#user-tools a {
+    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
+}
+
+#user-tools a:focus, #user-tools a:hover {
+    text-decoration: none;
+    border-bottom-color: #79aec8;
+    color: #79aec8;
+}
+
+/* SIDEBAR */
+
+#content-related {
+    background: #f8f8f8;
+}
+
+#content-related .module {
+    background: none;
+}
+
+#content-related h3 {
+    font-size: 14px;
+    color: #666;
+    padding: 0 16px;
+    margin: 0 0 16px;
+}
+
+#content-related h4 {
+    font-size: 13px;
+}
+
+#content-related p {
+    padding-left: 16px;
+    padding-right: 16px;
+}
+
+#content-related .actionlist {
+    padding: 0;
+    margin: 16px;
+}
+
+#content-related .actionlist li {
+    line-height: 1.2;
+    margin-bottom: 10px;
+    padding-left: 18px;
+}
+
+#content-related .module h2 {
+    background: none;
+    padding: 16px;
+    margin-bottom: 16px;
+    border-bottom: 1px solid #eaeaea;
+    font-size: 18px;
+    color: #333;
+}
+
+.delete-confirmation form input[type="submit"] {
+    background: #ba2121;
+    border-radius: 4px;
+    padding: 10px 15px;
+    color: #fff;
+}
+
+.delete-confirmation form input[type="submit"]:active,
+.delete-confirmation form input[type="submit"]:focus,
+.delete-confirmation form input[type="submit"]:hover {
+    background: #a41515;
+}
+
+.delete-confirmation form .cancel-link {
+    display: inline-block;
+    vertical-align: middle;
+    height: 15px;
+    line-height: 15px;
+    background: #ddd;
+    border-radius: 4px;
+    padding: 10px 15px;
+    color: #333;
+    margin: 0 0 0 10px;
+}
+
+.delete-confirmation form .cancel-link:active,
+.delete-confirmation form .cancel-link:focus,
+.delete-confirmation form .cancel-link:hover {
+    background: #ccc;
+}
+
+/* POPUP */
+.popup #content {
+    padding: 20px;
+}
+
+.popup #container {
+    min-width: 0;
+}
+
+.popup #header {
+    padding: 10px 20px;
+}
diff --git a/interface/static/admin/css/changelists.css b/interface/static/admin/css/changelists.css
new file mode 100644
index 0000000..fd9e784
--- /dev/null
+++ b/interface/static/admin/css/changelists.css
@@ -0,0 +1,341 @@
+/* CHANGELISTS */
+
+#changelist {
+    position: relative;
+    width: 100%;
+}
+
+#changelist table {
+    width: 100%;
+}
+
+.change-list .hiddenfields { display:none; }
+
+.change-list .filtered table {
+    border-right: none;
+}
+
+.change-list .filtered {
+    min-height: 400px;
+}
+
+.change-list .filtered .results, .change-list .filtered .paginator,
+.filtered #toolbar, .filtered div.xfull {
+    margin-right: 280px;
+    width: auto;
+}
+
+.change-list .filtered table tbody th {
+    padding-right: 1em;
+}
+
+#changelist-form .results {
+  overflow-x: auto;
+}
+
+#changelist .toplinks {
+    border-bottom: 1px solid #ddd;
+}
+
+#changelist .paginator {
+    color: #666;
+    border-bottom: 1px solid #eee;
+    background: #fff;
+    overflow: hidden;
+}
+
+/* CHANGELIST TABLES */
+
+#changelist table thead th {
+    padding: 0;
+    white-space: nowrap;
+    vertical-align: middle;
+}
+
+#changelist table thead th.action-checkbox-column {
+    width: 1.5em;
+    text-align: center;
+}
+
+#changelist table tbody td.action-checkbox {
+    text-align: center;
+}
+
+#changelist table tfoot {
+    color: #666;
+}
+
+/* TOOLBAR */
+
+#changelist #toolbar {
+    padding: 8px 10px;
+    margin-bottom: 15px;
+    border-top: 1px solid #eee;
+    border-bottom: 1px solid #eee;
+    background: #f8f8f8;
+    color: #666;
+}
+
+#changelist #toolbar form input {
+    border-radius: 4px;
+    font-size: 14px;
+    padding: 5px;
+    color: #333;
+}
+
+#changelist #toolbar form #searchbar {
+    height: 19px;
+    border: 1px solid #ccc;
+    padding: 2px 5px;
+    margin: 0;
+    vertical-align: top;
+    font-size: 13px;
+}
+
+#changelist #toolbar form #searchbar:focus {
+    border-color: #999;
+}
+
+#changelist #toolbar form input[type="submit"] {
+    border: 1px solid #ccc;
+    padding: 2px 10px;
+    margin: 0;
+    vertical-align: middle;
+    background: #fff;
+    box-shadow: 0 -15px 20px -10px rgba(0, 0, 0, 0.15) inset;
+    cursor: pointer;
+    color: #333;
+}
+
+#changelist #toolbar form input[type="submit"]:focus,
+#changelist #toolbar form input[type="submit"]:hover {
+    border-color: #999;
+}
+
+#changelist #changelist-search img {
+    vertical-align: middle;
+    margin-right: 4px;
+}
+
+/* FILTER COLUMN */
+
+#changelist-filter {
+    position: absolute;
+    top: 0;
+    right: 0;
+    z-index: 1000;
+    width: 240px;
+    background: #f8f8f8;
+    border-left: none;
+    margin: 0;
+}
+
+#changelist-filter h2 {
+    font-size: 14px;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+    padding: 5px 15px;
+    margin-bottom: 12px;
+    border-bottom: none;
+}
+
+#changelist-filter h3 {
+    font-weight: 400;
+    font-size: 14px;
+    padding: 0 15px;
+    margin-bottom: 10px;
+}
+
+#changelist-filter ul {
+    margin: 5px 0;
+    padding: 0 15px 15px;
+    border-bottom: 1px solid #eaeaea;
+}
+
+#changelist-filter ul:last-child {
+    border-bottom: none;
+    padding-bottom: none;
+}
+
+#changelist-filter li {
+    list-style-type: none;
+    margin-left: 0;
+    padding-left: 0;
+}
+
+#changelist-filter a {
+    display: block;
+    color: #999;
+}
+
+#changelist-filter li.selected {
+    border-left: 5px solid #eaeaea;
+    padding-left: 10px;
+    margin-left: -15px;
+}
+
+#changelist-filter li.selected a {
+    color: #5b80b2;
+}
+
+#changelist-filter a:focus, #changelist-filter a:hover,
+#changelist-filter li.selected a:focus,
+#changelist-filter li.selected a:hover {
+    color: #036;
+}
+
+/* DATE DRILLDOWN */
+
+.change-list ul.toplinks {
+    display: block;
+    float: left;
+    padding: 0;
+    margin: 0;
+    width: 100%;
+}
+
+.change-list ul.toplinks li {
+    padding: 3px 6px;
+    font-weight: bold;
+    list-style-type: none;
+    display: inline-block;
+}
+
+.change-list ul.toplinks .date-back a {
+    color: #999;
+}
+
+.change-list ul.toplinks .date-back a:focus,
+.change-list ul.toplinks .date-back a:hover {
+    color: #036;
+}
+
+/* PAGINATOR */
+
+.paginator {
+    font-size: 13px;
+    padding-top: 10px;
+    padding-bottom: 10px;
+    line-height: 22px;
+    margin: 0;
+    border-top: 1px solid #ddd;
+}
+
+.paginator a:link, .paginator a:visited {
+    padding: 2px 6px;
+    background: #79aec8;
+    text-decoration: none;
+    color: #fff;
+}
+
+.paginator a.showall {
+    padding: 0;
+    border: none;
+    background: none;
+    color: #5b80b2;
+}
+
+.paginator a.showall:focus, .paginator a.showall:hover {
+    background: none;
+    color: #036;
+}
+
+.paginator .end {
+    margin-right: 6px;
+}
+
+.paginator .this-page {
+    padding: 2px 6px;
+    font-weight: bold;
+    font-size: 13px;
+    vertical-align: top;
+}
+
+.paginator a:focus, .paginator a:hover {
+    color: white;
+    background: #036;
+}
+
+/* ACTIONS */
+
+.filtered .actions {
+    margin-right: 280px;
+    border-right: none;
+}
+
+#changelist table input {
+    margin: 0;
+    vertical-align: baseline;
+}
+
+#changelist table tbody tr.selected {
+    background-color: #FFFFCC;
+}
+
+#changelist .actions {
+    padding: 10px;
+    background: #fff;
+    border-top: none;
+    border-bottom: none;
+    line-height: 24px;
+    color: #999;
+}
+
+#changelist .actions.selected {
+    background: #fffccf;
+    border-top: 1px solid #fffee8;
+    border-bottom: 1px solid #edecd6;
+}
+
+#changelist .actions span.all,
+#changelist .actions span.action-counter,
+#changelist .actions span.clear,
+#changelist .actions span.question {
+    font-size: 13px;
+    margin: 0 0.5em;
+    display: none;
+}
+
+#changelist .actions:last-child {
+    border-bottom: none;
+}
+
+#changelist .actions select {
+    vertical-align: top;
+    height: 24px;
+    background: none;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    font-size: 14px;
+    padding: 0 0 0 4px;
+    margin: 0;
+    margin-left: 10px;
+}
+
+#changelist .actions select:focus {
+    border-color: #999;
+}
+
+#changelist .actions label {
+    display: inline-block;
+    vertical-align: middle;
+    font-size: 13px;
+}
+
+#changelist .actions .button {
+    font-size: 13px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    background: #fff;
+    box-shadow: 0 -15px 20px -10px rgba(0, 0, 0, 0.15) inset;
+    cursor: pointer;
+    height: 24px;
+    line-height: 1;
+    padding: 4px 8px;
+    margin: 0;
+    color: #333;
+}
+
+#changelist .actions .button:focus, #changelist .actions .button:hover {
+    border-color: #999;
+}
diff --git a/interface/static/admin/css/dashboard.css b/interface/static/admin/css/dashboard.css
new file mode 100644
index 0000000..05808bc
--- /dev/null
+++ b/interface/static/admin/css/dashboard.css
@@ -0,0 +1,30 @@
+/* DASHBOARD */
+
+.dashboard .module table th {
+    width: 100%;
+}
+
+.dashboard .module table td {
+    white-space: nowrap;
+}
+
+.dashboard .module table td a {
+    display: block;
+    padding-right: .6em;
+}
+
+/* RECENT ACTIONS MODULE */
+
+.module ul.actionlist {
+    margin-left: 0;
+}
+
+ul.actionlist li {
+    list-style-type: none;
+}
+
+ul.actionlist li {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    -o-text-overflow: ellipsis;
+}
diff --git a/interface/static/admin/css/fonts.css b/interface/static/admin/css/fonts.css
new file mode 100644
index 0000000..c837e01
--- /dev/null
+++ b/interface/static/admin/css/fonts.css
@@ -0,0 +1,20 @@
+@font-face {
+    font-family: 'Roboto';
+    src: url('../fonts/Roboto-Bold-webfont.woff');
+    font-weight: 700;
+    font-style: normal;
+}
+
+@font-face {
+    font-family: 'Roboto';
+    src: url('../fonts/Roboto-Regular-webfont.woff');
+    font-weight: 400;
+    font-style: normal;
+}
+
+@font-face {
+    font-family: 'Roboto';
+    src: url('../fonts/Roboto-Light-webfont.woff');
+    font-weight: 300;
+    font-style: normal;
+}
diff --git a/interface/static/admin/css/forms.css b/interface/static/admin/css/forms.css
new file mode 100644
index 0000000..2a21257
--- /dev/null
+++ b/interface/static/admin/css/forms.css
@@ -0,0 +1,499 @@
+@import url('widgets.css');
+
+/* FORM ROWS */
+
+.form-row {
+    overflow: hidden;
+    padding: 10px;
+    font-size: 13px;
+    border-bottom: 1px solid #eee;
+}
+
+.form-row img, .form-row input {
+    vertical-align: middle;
+}
+
+.form-row label input[type="checkbox"] {
+    margin-top: 0;
+    vertical-align: 0;
+}
+
+form .form-row p {
+    padding-left: 0;
+}
+
+.hidden {
+    display: none;
+}
+
+/* FORM LABELS */
+
+label {
+    font-weight: normal;
+    color: #666;
+    font-size: 13px;
+}
+
+.required label, label.required {
+    font-weight: bold;
+    color: #333;
+}
+
+/* RADIO BUTTONS */
+
+form ul.radiolist li {
+    list-style-type: none;
+}
+
+form ul.radiolist label {
+    float: none;
+    display: inline;
+}
+
+form ul.radiolist input[type="radio"] {
+    margin: -2px 4px 0 0;
+    padding: 0;
+}
+
+form ul.inline {
+    margin-left: 0;
+    padding: 0;
+}
+
+form ul.inline li {
+    float: left;
+    padding-right: 7px;
+}
+
+/* ALIGNED FIELDSETS */
+
+.aligned label {
+    display: block;
+    padding: 4px 10px 0 0;
+    float: left;
+    width: 160px;
+    word-wrap: break-word;
+    line-height: 1;
+}
+
+.aligned label:not(.vCheckboxLabel):after {
+    content: '';
+    display: inline-block;
+    vertical-align: middle;
+    height: 26px;
+}
+
+.aligned label + p {
+    padding: 6px 0;
+    margin-top: 0;
+    margin-bottom: 0;
+    margin-left: 170px;
+}
+
+.aligned ul label {
+    display: inline;
+    float: none;
+    width: auto;
+}
+
+.aligned .form-row input {
+    margin-bottom: 0;
+}
+
+.colMS .aligned .vLargeTextField, .colMS .aligned .vXMLLargeTextField {
+    width: 350px;
+}
+
+form .aligned ul {
+    margin-left: 160px;
+    padding-left: 10px;
+}
+
+form .aligned ul.radiolist {
+    display: inline-block;
+    margin: 0;
+    padding: 0;
+}
+
+form .aligned p.help {
+    clear: left;
+    margin-top: 0;
+    margin-left: 160px;
+    padding-left: 10px;
+}
+
+form .aligned label + p.help {
+    margin-left: 0;
+    padding-left: 0;
+}
+
+form .aligned p.help:last-child {
+    margin-bottom: 0;
+    padding-bottom: 0;
+}
+
+form .aligned input + p.help,
+form .aligned textarea + p.help,
+form .aligned select + p.help {
+    margin-left: 160px;
+    padding-left: 10px;
+}
+
+form .aligned ul li {
+    list-style: none;
+}
+
+form .aligned table p {
+    margin-left: 0;
+    padding-left: 0;
+}
+
+.aligned .vCheckboxLabel {
+    float: none;
+    width: auto;
+    display: inline-block;
+    vertical-align: -3px;
+    padding: 0 0 5px 5px;
+}
+
+.aligned .vCheckboxLabel + p.help {
+    margin-top: -4px;
+}
+
+.colM .aligned .vLargeTextField, .colM .aligned .vXMLLargeTextField {
+    width: 610px;
+}
+
+.checkbox-row p.help {
+    margin-left: 0;
+    padding-left: 0;
+}
+
+fieldset .field-box {
+    float: left;
+    margin-right: 20px;
+}
+
+/* WIDE FIELDSETS */
+
+.wide label {
+    width: 200px;
+}
+
+form .wide p, form .wide input + p.help {
+    margin-left: 200px;
+}
+
+form .wide p.help {
+    padding-left: 38px;
+}
+
+.colM fieldset.wide .vLargeTextField, .colM fieldset.wide .vXMLLargeTextField {
+    width: 450px;
+}
+
+/* COLLAPSED FIELDSETS */
+
+fieldset.collapsed * {
+    display: none;
+}
+
+fieldset.collapsed h2, fieldset.collapsed {
+    display: block;
+}
+
+fieldset.collapsed {
+    border: 1px solid #eee;
+    border-radius: 4px;
+    overflow: hidden;
+}
+
+fieldset.collapsed h2 {
+    background: #f8f8f8;
+    color: #666;
+}
+
+fieldset .collapse-toggle {
+    color: #fff;
+}
+
+fieldset.collapsed .collapse-toggle {
+    background: transparent;
+    display: inline;
+    color: #447e9b;
+}
+
+/* MONOSPACE TEXTAREAS */
+
+fieldset.monospace textarea {
+    font-family: "Bitstream Vera Sans Mono", Monaco, "Courier New", Courier, monospace;
+}
+
+/* SUBMIT ROW */
+
+.submit-row {
+    padding: 12px 14px;
+    margin: 0 0 20px;
+    background: #f8f8f8;
+    border: 1px solid #eee;
+    border-radius: 4px;
+    text-align: right;
+    overflow: hidden;
+}
+
+body.popup .submit-row {
+    overflow: auto;
+}
+
+.submit-row input {
+    height: 35px;
+    line-height: 15px;
+    margin: 0 0 0 5px;
+}
+
+.submit-row input.default {
+    margin: 0 0 0 8px;
+    text-transform: uppercase;
+}
+
+.submit-row p {
+    margin: 0.3em;
+}
+
+.submit-row p.deletelink-box {
+    float: left;
+    margin: 0;
+}
+
+.submit-row a.deletelink {
+    display: block;
+    background: #ba2121;
+    border-radius: 4px;
+    padding: 10px 15px;
+    height: 15px;
+    line-height: 15px;
+    color: #fff;
+}
+
+.submit-row a.deletelink:focus,
+.submit-row a.deletelink:hover,
+.submit-row a.deletelink:active {
+    background: #a41515;
+}
+
+/* CUSTOM FORM FIELDS */
+
+.vSelectMultipleField {
+    vertical-align: top;
+}
+
+.vCheckboxField {
+    border: none;
+}
+
+.vDateField, .vTimeField {
+    margin-right: 2px;
+    margin-bottom: 4px;
+}
+
+.vDateField {
+    min-width: 6.85em;
+}
+
+.vTimeField {
+    min-width: 4.7em;
+}
+
+.vURLField {
+    width: 30em;
+}
+
+.vLargeTextField, .vXMLLargeTextField {
+    width: 48em;
+}
+
+.flatpages-flatpage #id_content {
+    height: 40.2em;
+}
+
+.module table .vPositiveSmallIntegerField {
+    width: 2.2em;
+}
+
+.vTextField {
+    width: 20em;
+}
+
+.vIntegerField {
+    width: 5em;
+}
+
+.vBigIntegerField {
+    width: 10em;
+}
+
+.vForeignKeyRawIdAdminField {
+    width: 5em;
+}
+
+/* INLINES */
+
+.inline-group {
+    padding: 0;
+    margin: 0 0 30px;
+}
+
+.inline-group thead th {
+    padding: 8px 10px;
+}
+
+.inline-group .aligned label {
+    width: 160px;
+}
+
+.inline-related {
+    position: relative;
+}
+
+.inline-related h3 {
+    margin: 0;
+    color: #666;
+    padding: 5px;
+    font-size: 13px;
+    background: #f8f8f8;
+    border-top: 1px solid #eee;
+    border-bottom: 1px solid #eee;
+}
+
+.inline-related h3 span.delete {
+    float: right;
+}
+
+.inline-related h3 span.delete label {
+    margin-left: 2px;
+    font-size: 11px;
+}
+
+.inline-related fieldset {
+    margin: 0;
+    background: #fff;
+    border: none;
+    width: 100%;
+}
+
+.inline-related fieldset.module h3 {
+    margin: 0;
+    padding: 2px 5px 3px 5px;
+    font-size: 11px;
+    text-align: left;
+    font-weight: bold;
+    background: #bcd;
+    color: #fff;
+}
+
+.inline-group .tabular fieldset.module {
+    border: none;
+}
+
+.inline-related.tabular fieldset.module table {
+    width: 100%;
+}
+
+.last-related fieldset {
+    border: none;
+}
+
+.inline-group .tabular tr.has_original td {
+    padding-top: 2em;
+}
+
+.inline-group .tabular tr td.original {
+    padding: 2px 0 0 0;
+    width: 0;
+    _position: relative;
+}
+
+.inline-group .tabular th.original {
+    width: 0px;
+    padding: 0;
+}
+
+.inline-group .tabular td.original p {
+    position: absolute;
+    left: 0;
+    height: 1.1em;
+    padding: 2px 9px;
+    overflow: hidden;
+    font-size: 9px;
+    font-weight: bold;
+    color: #666;
+    _width: 700px;
+}
+
+.inline-group ul.tools {
+    padding: 0;
+    margin: 0;
+    list-style: none;
+}
+
+.inline-group ul.tools li {
+    display: inline;
+    padding: 0 5px;
+}
+
+.inline-group div.add-row,
+.inline-group .tabular tr.add-row td {
+    color: #666;
+    background: #f8f8f8;
+    padding: 8px 10px;
+    border-bottom: 1px solid #eee;
+}
+
+.inline-group .tabular tr.add-row td {
+    padding: 8px 10px;
+    border-bottom: 1px solid #eee;
+}
+
+.inline-group ul.tools a.add,
+.inline-group div.add-row a,
+.inline-group .tabular tr.add-row td a {
+    background: url(../img/icon-addlink.svg) 0 1px no-repeat;
+    padding-left: 16px;
+    font-size: 12px;
+}
+
+.empty-form {
+    display: none;
+}
+
+/* RELATED FIELD ADD ONE / LOOKUP */
+
+.add-another, .related-lookup {
+    margin-left: 5px;
+    display: inline-block;
+    vertical-align: middle;
+    background-repeat: no-repeat;
+    background-size: 14px;
+}
+
+.add-another {
+    width: 16px;
+    height: 16px;
+    background-image: url(../img/icon-addlink.svg);
+}
+
+.related-lookup {
+    width: 16px;
+    height: 16px;
+    background-image: url(../img/search.svg);
+}
+
+form .related-widget-wrapper ul {
+    display: inline-block;
+    margin-left: 0;
+    padding-left: 0;
+}
+
+.clearable-file-input input {
+    margin-top: 0;
+}
diff --git a/interface/static/admin/css/login.css b/interface/static/admin/css/login.css
new file mode 100644
index 0000000..cab3bbf
--- /dev/null
+++ b/interface/static/admin/css/login.css
@@ -0,0 +1,78 @@
+/* LOGIN FORM */
+
+body.login {
+    background: #f8f8f8;
+}
+
+.login #header {
+    height: auto;
+    padding: 5px 16px;
+}
+
+.login #header h1 {
+    font-size: 18px;
+}
+
+.login #header h1 a {
+    color: #fff;
+}
+
+.login #content {
+    padding: 20px 20px 0;
+}
+
+.login #container {
+    background: #fff;
+    border: 1px solid #eaeaea;
+    border-radius: 4px;
+    overflow: hidden;
+    width: 28em;
+    min-width: 300px;
+    margin: 100px auto;
+}
+
+.login #content-main {
+    width: 100%;
+}
+
+.login .form-row {
+    padding: 4px 0;
+    float: left;
+    width: 100%;
+    border-bottom: none;
+}
+
+.login .form-row label {
+    padding-right: 0.5em;
+    line-height: 2em;
+    font-size: 1em;
+    clear: both;
+    color: #333;
+}
+
+.login .form-row #id_username, .login .form-row #id_password {
+    clear: both;
+    padding: 8px;
+    width: 100%;
+    -webkit-box-sizing: border-box;
+       -moz-box-sizing: border-box;
+            box-sizing: border-box;
+}
+
+.login span.help {
+    font-size: 10px;
+    display: block;
+}
+
+.login .submit-row {
+    clear: both;
+    padding: 1em 0 0 9.4em;
+    margin: 0;
+    border: none;
+    background: none;
+    text-align: left;
+}
+
+.login .password-reset-link {
+    text-align: center;
+}
diff --git a/interface/static/admin/css/rtl.css b/interface/static/admin/css/rtl.css
new file mode 100644
index 0000000..8c1ceb4
--- /dev/null
+++ b/interface/static/admin/css/rtl.css
@@ -0,0 +1,256 @@
+body {
+    direction: rtl;
+}
+
+/* LOGIN */
+
+.login .form-row {
+    float: right;
+}
+
+.login .form-row label {
+    float: right;
+    padding-left: 0.5em;
+    padding-right: 0;
+    text-align: left;
+}
+
+.login .submit-row {
+    clear: both;
+    padding: 1em 9.4em 0 0;
+}
+
+/* GLOBAL */
+
+th {
+    text-align: right;
+}
+
+.module h2, .module caption {
+    text-align: right;
+}
+
+.module ul, .module ol {
+    margin-left: 0;
+    margin-right: 1.5em;
+}
+
+.addlink, .changelink {
+    padding-left: 0;
+    padding-right: 16px;
+    background-position: 100% 1px;
+}
+
+.deletelink {
+    padding-left: 0;
+    padding-right: 16px;
+    background-position: 100% 1px;
+}
+
+.object-tools {
+    float: left;
+}
+
+thead th:first-child,
+tfoot td:first-child {
+    border-left: none;
+}
+
+/* LAYOUT */
+
+#user-tools {
+    right: auto;
+    left: 0;
+    text-align: left;
+}
+
+div.breadcrumbs {
+    text-align: right;
+}
+
+#content-main {
+    float: right;
+}
+
+#content-related {
+    float: left;
+    margin-left: -300px;
+    margin-right: auto;
+}
+
+.colMS {
+    margin-left: 300px;
+    margin-right: 0;
+}
+
+/* SORTABLE TABLES */
+
+table thead th.sorted .sortoptions {
+   float: left;
+}
+
+thead th.sorted .text {
+    padding-right: 0;
+    padding-left: 42px;
+}
+
+/* dashboard styles */
+
+.dashboard .module table td a {
+    padding-left: .6em;
+    padding-right: 16px;
+}
+
+/* changelists styles */
+
+.change-list .filtered table {
+    border-left: none;
+    border-right: 0px none;
+}
+
+#changelist-filter {
+    right: auto;
+    left: 0;
+    border-left: none;
+    border-right: none;
+}
+
+.change-list .filtered .results, .change-list .filtered .paginator, .filtered #toolbar, .filtered div.xfull {
+    margin-right: 0;
+    margin-left: 280px;
+}
+
+#changelist-filter li.selected {
+    border-left: none;
+    padding-left: 10px;
+    margin-left: 0;
+    border-right: 5px solid #eaeaea;
+    padding-right: 10px;
+    margin-right: -15px;
+}
+
+.filtered .actions {
+    margin-left: 280px;
+    margin-right: 0;
+}
+
+#changelist table tbody td:first-child, #changelist table tbody th:first-child {
+    border-right: none;
+    border-left: none;
+}
+
+/* FORMS */
+
+.aligned label {
+    padding: 0 0 3px 1em;
+    float: right;
+}
+
+.submit-row {
+    text-align: left
+}
+
+.submit-row p.deletelink-box {
+    float: right;
+}
+
+.submit-row input.default {
+    margin-left: 0;
+}
+
+.vDateField, .vTimeField {
+    margin-left: 2px;
+}
+
+.aligned .form-row input {
+    margin-left: 5px;
+}
+
+form ul.inline li {
+    float: right;
+    padding-right: 0;
+    padding-left: 7px;
+}
+
+input[type=submit].default, .submit-row input.default {
+    float: left;
+}
+
+fieldset .field-box {
+    float: right;
+    margin-left: 20px;
+    margin-right: 0;
+}
+
+.errorlist li {
+    background-position: 100% 12px;
+    padding: 0;
+}
+
+.errornote {
+    background-position: 100% 12px;
+    padding: 10px 12px;
+}
+
+/* WIDGETS */
+
+.calendarnav-previous {
+    top: 0;
+    left: auto;
+    right: 10px;
+}
+
+.calendarnav-next {
+    top: 0;
+    right: auto;
+    left: 10px;
+}
+
+.calendar caption, .calendarbox h2 {
+    text-align: center;
+}
+
+.selector {
+    float: right;
+}
+
+.selector .selector-filter {
+    text-align: right;
+}
+
+.inline-deletelink {
+    float: left;
+}
+
+form .form-row p.datetime {
+    overflow: hidden;
+}
+
+/* MISC */
+
+.inline-related h2, .inline-group h2 {
+    text-align: right
+}
+
+.inline-related h3 span.delete {
+    padding-right: 20px;
+    padding-left: inherit;
+    left: 10px;
+    right: inherit;
+    float:left;
+}
+
+.inline-related h3 span.delete label {
+    margin-left: inherit;
+    margin-right: 2px;
+}
+
+/* IE7 specific bug fixes */
+
+div.colM {
+    position: relative;
+}
+
+.submit-row input {
+    float: left;
+}
diff --git a/interface/static/admin/css/widgets.css b/interface/static/admin/css/widgets.css
new file mode 100644
index 0000000..d3bd67a
--- /dev/null
+++ b/interface/static/admin/css/widgets.css
@@ -0,0 +1,565 @@
+/* SELECTOR (FILTER INTERFACE) */
+
+.selector {
+    width: 800px;
+    float: left;
+}
+
+.selector select {
+    width: 380px;
+    height: 17.2em;
+}
+
+.selector-available, .selector-chosen {
+    float: left;
+    width: 380px;
+    text-align: center;
+    margin-bottom: 5px;
+}
+
+.selector-chosen select {
+    border-top: none;
+}
+
+.selector-available h2, .selector-chosen h2 {
+    border: 1px solid #ccc;
+    border-radius: 4px 4px 0 0;
+}
+
+.selector-chosen h2 {
+    background: #79aec8;
+    color: #fff;
+}
+
+.selector .selector-available h2 {
+    background: #f8f8f8;
+    color: #666;
+}
+
+.selector .selector-filter {
+    background: white;
+    border: 1px solid #ccc;
+    border-width: 0 1px;
+    padding: 8px;
+    color: #999;
+    font-size: 10px;
+    margin: 0;
+    text-align: left;
+}
+
+.selector .selector-filter label,
+.inline-group .aligned .selector .selector-filter label {
+    float: left;
+    margin: 7px 0 0;
+    width: 18px;
+    height: 18px;
+    padding: 0;
+    overflow: hidden;
+    line-height: 1;
+}
+
+.selector .selector-available input {
+    width: 320px;
+    margin-left: 8px;
+}
+
+.selector ul.selector-chooser {
+    float: left;
+    width: 22px;
+    background-color: #eee;
+    border-radius: 10px;
+    margin: 10em 5px 0 5px;
+    padding: 0;
+}
+
+.selector-chooser li {
+    margin: 0;
+    padding: 3px;
+    list-style-type: none;
+}
+
+.selector select {
+    padding: 0 10px;
+    margin: 0 0 10px;
+    border-radius: 0 0 4px 4px;
+}
+
+.selector-add, .selector-remove {
+    width: 16px;
+    height: 16px;
+    display: block;
+    text-indent: -3000px;
+    overflow: hidden;
+    cursor: default;
+    opacity: 0.3;
+}
+
+.active.selector-add, .active.selector-remove {
+    opacity: 1;
+}
+
+.active.selector-add:hover, .active.selector-remove:hover {
+    cursor: pointer;
+}
+
+.selector-add {
+    background: url(../img/selector-icons.svg) 0 -96px no-repeat;
+}
+
+.active.selector-add:focus, .active.selector-add:hover {
+    background-position: 0 -112px;
+}
+
+.selector-remove {
+    background: url(../img/selector-icons.svg) 0 -64px no-repeat;
+}
+
+.active.selector-remove:focus, .active.selector-remove:hover {
+    background-position: 0 -80px;
+}
+
+a.selector-chooseall, a.selector-clearall {
+    display: inline-block;
+    height: 16px;
+    text-align: left;
+    margin: 1px auto 3px;
+    overflow: hidden;
+    font-weight: bold;
+    line-height: 16px;
+    color: #666;
+    text-decoration: none;
+    opacity: 0.3;
+}
+
+a.active.selector-chooseall:focus, a.active.selector-clearall:focus,
+a.active.selector-chooseall:hover, a.active.selector-clearall:hover {
+    color: #447e9b;
+}
+
+a.active.selector-chooseall, a.active.selector-clearall {
+    opacity: 1;
+}
+
+a.active.selector-chooseall:hover, a.active.selector-clearall:hover {
+    cursor: pointer;
+}
+
+a.selector-chooseall {
+    padding: 0 18px 0 0;
+    background: url(../img/selector-icons.svg) right -160px no-repeat;
+    cursor: default;
+}
+
+a.active.selector-chooseall:focus, a.active.selector-chooseall:hover {
+    background-position: 100% -176px;
+}
+
+a.selector-clearall {
+    padding: 0 0 0 18px;
+    background: url(../img/selector-icons.svg) 0 -128px no-repeat;
+    cursor: default;
+}
+
+a.active.selector-clearall:focus, a.active.selector-clearall:hover {
+    background-position: 0 -144px;
+}
+
+/* STACKED SELECTORS */
+
+.stacked {
+    float: left;
+    width: 490px;
+}
+
+.stacked select {
+    width: 480px;
+    height: 10.1em;
+}
+
+.stacked .selector-available, .stacked .selector-chosen {
+    width: 480px;
+}
+
+.stacked .selector-available {
+    margin-bottom: 0;
+}
+
+.stacked .selector-available input {
+    width: 422px;
+}
+
+.stacked ul.selector-chooser {
+    height: 22px;
+    width: 50px;
+    margin: 0 0 10px 40%;
+    background-color: #eee;
+    border-radius: 10px;
+}
+
+.stacked .selector-chooser li {
+    float: left;
+    padding: 3px 3px 3px 5px;
+}
+
+.stacked .selector-chooseall, .stacked .selector-clearall {
+    display: none;
+}
+
+.stacked .selector-add {
+    background: url(../img/selector-icons.svg) 0 -32px no-repeat;
+    cursor: default;
+}
+
+.stacked .active.selector-add {
+    background-position: 0 -48px;
+    cursor: pointer;
+}
+
+.stacked .selector-remove {
+    background: url(../img/selector-icons.svg) 0 0 no-repeat;
+    cursor: default;
+}
+
+.stacked .active.selector-remove {
+    background-position: 0 -16px;
+    cursor: pointer;
+}
+
+.selector .help-icon {
+    background: url(../img/icon-unknown.svg) 0 0 no-repeat;
+    display: inline-block;
+    vertical-align: middle;
+    margin: -2px 0 0 2px;
+    width: 13px;
+    height: 13px;
+}
+
+.selector .selector-chosen .help-icon {
+    background: url(../img/icon-unknown-alt.svg) 0 0 no-repeat;
+}
+
+.selector .search-label-icon {
+    background: url(../img/search.svg) 0 0 no-repeat;
+    display: inline-block;
+    height: 18px;
+    width: 18px;
+}
+
+/* DATE AND TIME */
+
+p.datetime {
+    line-height: 20px;
+    margin: 0;
+    padding: 0;
+    color: #666;
+    font-weight: bold;
+}
+
+.datetime span {
+    white-space: nowrap;
+    font-weight: normal;
+    font-size: 11px;
+    color: #ccc;
+}
+
+.datetime input, .form-row .datetime input.vDateField, .form-row .datetime input.vTimeField {
+    min-width: 0;
+    margin-left: 5px;
+    margin-bottom: 4px;
+}
+
+table p.datetime {
+    font-size: 11px;
+    margin-left: 0;
+    padding-left: 0;
+}
+
+.datetimeshortcuts .clock-icon, .datetimeshortcuts .date-icon {
+    position: relative;
+    display: inline-block;
+    vertical-align: middle;
+    height: 16px;
+    width: 16px;
+    overflow: hidden;
+}
+
+.datetimeshortcuts .clock-icon {
+    background: url(../img/icon-clock.svg) 0 0 no-repeat;
+}
+
+.datetimeshortcuts a:focus .clock-icon,
+.datetimeshortcuts a:hover .clock-icon {
+    background-position: 0 -16px;
+}
+
+.datetimeshortcuts .date-icon {
+    background: url(../img/icon-calendar.svg) 0 0 no-repeat;
+    top: -1px;
+}
+
+.datetimeshortcuts a:focus .date-icon,
+.datetimeshortcuts a:hover .date-icon {
+    background-position: 0 -16px;
+}
+
+.timezonewarning {
+    font-size: 11px;
+    color: #999;
+}
+
+/* URL */
+
+p.url {
+    line-height: 20px;
+    margin: 0;
+    padding: 0;
+    color: #666;
+    font-size: 11px;
+    font-weight: bold;
+}
+
+.url a {
+    font-weight: normal;
+}
+
+/* FILE UPLOADS */
+
+p.file-upload {
+    line-height: 20px;
+    margin: 0;
+    padding: 0;
+    color: #666;
+    font-size: 11px;
+    font-weight: bold;
+}
+
+.aligned p.file-upload {
+    margin-left: 170px;
+}
+
+.file-upload a {
+    font-weight: normal;
+}
+
+.file-upload .deletelink {
+    margin-left: 5px;
+}
+
+span.clearable-file-input label {
+    color: #333;
+    font-size: 11px;
+    display: inline;
+    float: none;
+}
+
+/* CALENDARS & CLOCKS */
+
+.calendarbox, .clockbox {
+    margin: 5px auto;
+    font-size: 12px;
+    width: 19em;
+    text-align: center;
+    background: white;
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
+    overflow: hidden;
+    position: relative;
+}
+
+.clockbox {
+    width: auto;
+}
+
+.calendar {
+    margin: 0;
+    padding: 0;
+}
+
+.calendar table {
+    margin: 0;
+    padding: 0;
+    border-collapse: collapse;
+    background: white;
+    width: 100%;
+}
+
+.calendar caption, .calendarbox h2 {
+    margin: 0;
+    text-align: center;
+    border-top: none;
+    background: #f5dd5d;
+    font-weight: 700;
+    font-size: 12px;
+    color: #333;
+}
+
+.calendar th {
+    padding: 8px 5px;
+    background: #f8f8f8;
+    border-bottom: 1px solid #ddd;
+    font-weight: 400;
+    font-size: 12px;
+    text-align: center;
+    color: #666;
+}
+
+.calendar td {
+    font-weight: 400;
+    font-size: 12px;
+    text-align: center;
+    padding: 0;
+    border-top: 1px solid #eee;
+    border-bottom: none;
+}
+
+.calendar td.selected a {
+    background: #79aec8;
+    color: #fff;
+}
+
+.calendar td.nonday {
+    background: #f8f8f8;
+}
+
+.calendar td.today a {
+    font-weight: 700;
+}
+
+.calendar td a, .timelist a {
+    display: block;
+    font-weight: 400;
+    padding: 6px;
+    text-decoration: none;
+    color: #444;
+}
+
+.calendar td a:focus, .timelist a:focus,
+.calendar td a:hover, .timelist a:hover {
+    background: #79aec8;
+    color: white;
+}
+
+.calendar td a:active, .timelist a:active {
+    background: #417690;
+    color: white;
+}
+
+.calendarnav {
+    font-size: 10px;
+    text-align: center;
+    color: #ccc;
+    margin: 0;
+    padding: 1px 3px;
+}
+
+.calendarnav a:link, #calendarnav a:visited,
+#calendarnav a:focus, #calendarnav a:hover {
+    color: #999;
+}
+
+.calendar-shortcuts {
+    background: white;
+    font-size: 11px;
+    line-height: 11px;
+    border-top: 1px solid #eee;
+    padding: 8px 0;
+    color: #ccc;
+}
+
+.calendarbox .calendarnav-previous, .calendarbox .calendarnav-next {
+    display: block;
+    position: absolute;
+    top: 8px;
+    width: 15px;
+    height: 15px;
+    text-indent: -9999px;
+    padding: 0;
+}
+
+.calendarnav-previous {
+    left: 10px;
+    background: url(../img/calendar-icons.svg) 0 0 no-repeat;
+}
+
+.calendarbox .calendarnav-previous:focus,
+.calendarbox .calendarnav-previous:hover {
+    background-position: 0 -15px;
+}
+
+.calendarnav-next {
+    right: 10px;
+    background: url(../img/calendar-icons.svg) 0 -30px no-repeat;
+}
+
+.calendarbox .calendarnav-next:focus,
+.calendarbox .calendarnav-next:hover {
+    background-position: 0 -45px;
+}
+
+.calendar-cancel {
+    margin: 0;
+    padding: 4px 0;
+    font-size: 12px;
+    background: #eee;
+    border-top: 1px solid #ddd;
+    color: #333;
+}
+
+.calendar-cancel:focus, .calendar-cancel:hover {
+    background: #ddd;
+}
+
+.calendar-cancel a {
+    color: black;
+    display: block;
+}
+
+ul.timelist, .timelist li {
+    list-style-type: none;
+    margin: 0;
+    padding: 0;
+}
+
+.timelist a {
+    padding: 2px;
+}
+
+/* EDIT INLINE */
+
+.inline-deletelink {
+    float: right;
+    text-indent: -9999px;
+    background: url(../img/inline-delete.svg) 0 0 no-repeat;
+    width: 16px;
+    height: 16px;
+    border: 0px none;
+}
+
+.inline-deletelink:focus, .inline-deletelink:hover {
+    cursor: pointer;
+}
+
+/* RELATED WIDGET WRAPPER */
+.related-widget-wrapper {
+    float: left;       /* display properly in form rows with multiple fields */
+    overflow: hidden;  /* clear floated contents */
+}
+
+.related-widget-wrapper-link {
+    opacity: 0.3;
+}
+
+.related-widget-wrapper-link:link {
+    opacity: .8;
+}
+
+.related-widget-wrapper-link:link:focus,
+.related-widget-wrapper-link:link:hover {
+    opacity: 1;
+}
+
+select + .related-widget-wrapper-link,
+.related-widget-wrapper-link + .related-widget-wrapper-link {
+    margin-left: 7px;
+}
diff --git a/interface/static/admin/fonts/LICENSE.txt b/interface/static/admin/fonts/LICENSE.txt
new file mode 100644
index 0000000..75b5248
--- /dev/null
+++ b/interface/static/admin/fonts/LICENSE.txt
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      Work (including but not limited to damages for loss of goodwill,
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+
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+       http://www.apache.org/licenses/LICENSE-2.0
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+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
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diff --git a/interface/static/admin/fonts/README.txt b/interface/static/admin/fonts/README.txt
new file mode 100644
index 0000000..cc2135a
--- /dev/null
+++ b/interface/static/admin/fonts/README.txt
@@ -0,0 +1,2 @@
+Roboto webfont source: https://www.google.com/fonts/specimen/Roboto
+Weights used in this project: Light (300), Regular (400), Bold (700)
diff --git a/interface/static/admin/fonts/Roboto-Bold-webfont.woff b/interface/static/admin/fonts/Roboto-Bold-webfont.woff
new file mode 100644
index 0000000..03357ce
Binary files /dev/null and b/interface/static/admin/fonts/Roboto-Bold-webfont.woff differ
diff --git a/interface/static/admin/fonts/Roboto-Light-webfont.woff b/interface/static/admin/fonts/Roboto-Light-webfont.woff
new file mode 100644
index 0000000..f6abd87
Binary files /dev/null and b/interface/static/admin/fonts/Roboto-Light-webfont.woff differ
diff --git a/interface/static/admin/fonts/Roboto-Regular-webfont.woff b/interface/static/admin/fonts/Roboto-Regular-webfont.woff
new file mode 100644
index 0000000..6ff6afd
Binary files /dev/null and b/interface/static/admin/fonts/Roboto-Regular-webfont.woff differ
diff --git a/interface/static/admin/img/LICENSE b/interface/static/admin/img/LICENSE
new file mode 100644
index 0000000..a4faaa1
--- /dev/null
+++ b/interface/static/admin/img/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Code Charm Ltd
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/interface/static/admin/img/README.txt b/interface/static/admin/img/README.txt
new file mode 100644
index 0000000..43373ad
--- /dev/null
+++ b/interface/static/admin/img/README.txt
@@ -0,0 +1,7 @@
+All icons are taken from Font Awesome (http://fontawesome.io/) project.
+The Font Awesome font is licensed under the SIL OFL 1.1:
+- http://scripts.sil.org/OFL
+
+SVG icons source: https://github.com/encharm/Font-Awesome-SVG-PNG
+Font-Awesome-SVG-PNG is licensed under the MIT license (see file license
+in current folder).
diff --git a/interface/static/admin/img/calendar-icons.svg b/interface/static/admin/img/calendar-icons.svg
new file mode 100644
index 0000000..dbf21c3
--- /dev/null
+++ b/interface/static/admin/img/calendar-icons.svg
@@ -0,0 +1,14 @@
+<svg width="15" height="60" viewBox="0 0 1792 7168" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <g id="previous">
+      <path d="M1037 1395l102-102q19-19 19-45t-19-45l-307-307 307-307q19-19 19-45t-19-45l-102-102q-19-19-45-19t-45 19l-454 454q-19 19-19 45t19 45l454 454q19 19 45 19t45-19zm627-499q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+    <g id="next">
+      <path d="M845 1395l454-454q19-19 19-45t-19-45l-454-454q-19-19-45-19t-45 19l-102 102q-19 19-19 45t19 45l307 307-307 307q-19 19-19 45t19 45l102 102q19 19 45 19t45-19zm819-499q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+  </defs>
+  <use xlink:href="#previous" x="0" y="0" fill="#333333" />
+  <use xlink:href="#previous" x="0" y="1792" fill="#000000" />
+  <use xlink:href="#next" x="0" y="3584" fill="#333333" />
+  <use xlink:href="#next" x="0" y="5376" fill="#000000" />
+</svg>
diff --git a/interface/static/admin/img/gis/move_vertex_off.svg b/interface/static/admin/img/gis/move_vertex_off.svg
new file mode 100644
index 0000000..228854f
--- /dev/null
+++ b/interface/static/admin/img/gis/move_vertex_off.svg
@@ -0,0 +1 @@
+<svg width="24" height="22" viewBox="0 0 847 779" xmlns="http://www.w3.org/2000/svg"><g><path fill="#EBECE6" d="M120 1h607c66 0 120 54 120 120v536c0 66-54 120-120 120h-607c-66 0-120-54-120-120v-536c0-66 54-120 120-120z"/><path fill="#9E9E93" d="M120 1h607c66 0 120 54 120 120v536c0 66-54 120-120 120h-607c-66 0-120-54-120-120v-536c0-66 54-120 120-120zm607 25h-607c-26 0-50 11-67 28-17 18-28 41-28 67v536c0 27 11 50 28 68 17 17 41 27 67 27h607c26 0 49-10 67-27 17-18 28-41 28-68v-536c0-26-11-49-28-67-18-17-41-28-67-28z"/><path stroke="#A9A8A4" stroke-width="20" d="M706 295l-68 281"/><path stroke="#E47474" stroke-width="20" d="M316 648l390-353M141 435l175 213"/><path stroke="#C9C9C9" stroke-width="20" d="M319 151l-178 284M706 295l-387-144"/><g fill="#040405"><path d="M319 111c22 0 40 18 40 40s-18 40-40 40-40-18-40-40 18-40 40-40zM141 395c22 0 40 18 40 40s-18 40-40 40c-23 0-41-18-41-40s18-40 41-40zM316 608c22 0 40 18 40 40 0 23-18 41-40 41s-40-18-40-41c0-22 18-40 40-40zM706 254c22 0 40 18 40 41 0 22-18 40-40 40s-40-18-40-40c0-23 18-41 40-41zM638 536c22 0 40 18 40 40s-18 40-40 40-40-18-40-40 18-40 40-40z"/></g></g></svg>
\ No newline at end of file
diff --git a/interface/static/admin/img/gis/move_vertex_on.svg b/interface/static/admin/img/gis/move_vertex_on.svg
new file mode 100644
index 0000000..96b87fd
--- /dev/null
+++ b/interface/static/admin/img/gis/move_vertex_on.svg
@@ -0,0 +1 @@
+<svg width="24" height="22" viewBox="0 0 847 779" xmlns="http://www.w3.org/2000/svg"><g><path fill="#F1C02A" d="M120 1h607c66 0 120 54 120 120v536c0 66-54 120-120 120h-607c-66 0-120-54-120-120v-536c0-66 54-120 120-120z"/><path fill="#9E9E93" d="M120 1h607c66 0 120 54 120 120v536c0 66-54 120-120 120h-607c-66 0-120-54-120-120v-536c0-66 54-120 120-120zm607 25h-607c-26 0-50 11-67 28-17 18-28 41-28 67v536c0 27 11 50 28 68 17 17 41 27 67 27h607c26 0 49-10 67-27 17-18 28-41 28-68v-536c0-26-11-49-28-67-18-17-41-28-67-28z"/><path stroke="#A9A8A4" stroke-width="20" d="M706 295l-68 281"/><path stroke="#E47474" stroke-width="20" d="M316 648l390-353M141 435l175 213"/><path stroke="#C9A741" stroke-width="20" d="M319 151l-178 284M706 295l-387-144"/><g fill="#040405"><path d="M319 111c22 0 40 18 40 40s-18 40-40 40-40-18-40-40 18-40 40-40zM141 395c22 0 40 18 40 40s-18 40-40 40c-23 0-41-18-41-40s18-40 41-40zM316 608c22 0 40 18 40 40 0 23-18 41-40 41s-40-18-40-41c0-22 18-40 40-40zM706 254c22 0 40 18 40 41 0 22-18 40-40 40s-40-18-40-40c0-23 18-41 40-41zM638 536c22 0 40 18 40 40s-18 40-40 40-40-18-40-40 18-40 40-40z"/></g></g></svg>
\ No newline at end of file
diff --git a/interface/static/admin/img/icon-addlink.svg b/interface/static/admin/img/icon-addlink.svg
new file mode 100644
index 0000000..e004fb1
--- /dev/null
+++ b/interface/static/admin/img/icon-addlink.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#70bf2b" d="M1600 796v192q0 40-28 68t-68 28h-416v416q0 40-28 68t-68 28h-192q-40 0-68-28t-28-68v-416h-416q-40 0-68-28t-28-68v-192q0-40 28-68t68-28h416v-416q0-40 28-68t68-28h192q40 0 68 28t28 68v416h416q40 0 68 28t28 68z"/>
+</svg>
diff --git a/interface/static/admin/img/icon-alert.svg b/interface/static/admin/img/icon-alert.svg
new file mode 100644
index 0000000..e51ea83
--- /dev/null
+++ b/interface/static/admin/img/icon-alert.svg
@@ -0,0 +1,3 @@
+<svg width="14" height="14" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#efb80b" d="M1024 1375v-190q0-14-9.5-23.5t-22.5-9.5h-192q-13 0-22.5 9.5t-9.5 23.5v190q0 14 9.5 23.5t22.5 9.5h192q13 0 22.5-9.5t9.5-23.5zm-2-374l18-459q0-12-10-19-13-11-24-11h-220q-11 0-24 11-10 7-10 21l17 457q0 10 10 16.5t24 6.5h185q14 0 23.5-6.5t10.5-16.5zm-14-934l768 1408q35 63-2 126-17 29-46.5 46t-63.5 17h-1536q-34 0-63.5-17t-46.5-46q-37-63-2-126l768-1408q17-31 47-49t65-18 65 18 47 49z"/>
+</svg>
diff --git a/interface/static/admin/img/icon-calendar.svg b/interface/static/admin/img/icon-calendar.svg
new file mode 100644
index 0000000..97910a9
--- /dev/null
+++ b/interface/static/admin/img/icon-calendar.svg
@@ -0,0 +1,9 @@
+<svg width="16" height="32" viewBox="0 0 1792 3584" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <g id="icon">
+      <path d="M192 1664h288v-288h-288v288zm352 0h320v-288h-320v288zm-352-352h288v-320h-288v320zm352 0h320v-320h-320v320zm-352-384h288v-288h-288v288zm736 736h320v-288h-320v288zm-384-736h320v-288h-320v288zm768 736h288v-288h-288v288zm-384-352h320v-320h-320v320zm-352-864v-288q0-13-9.5-22.5t-22.5-9.5h-64q-13 0-22.5 9.5t-9.5 22.5v288q0 13 9.5 22.5t22.5 9.5h64q13 0 22.5-9.5t9.5-22.5zm736 864h288v-320h-288v320zm-384-384h320v-288h-320v288zm384 0h288v-288h-288v288zm32-480v-288q0-13-9.5-22.5t-22.5-9.5h-64q-13 0-22.5 9.5t-9.5 22.5v288q0 13 9.5 22.5t22.5 9.5h64q13 0 22.5-9.5t9.5-22.5zm384-64v1280q0 52-38 90t-90 38h-1408q-52 0-90-38t-38-90v-1280q0-52 38-90t90-38h128v-96q0-66 47-113t113-47h64q66 0 113 47t47 113v96h384v-96q0-66 47-113t113-47h64q66 0 113 47t47 113v96h128q52 0 90 38t38 90z"/>
+    </g>
+  </defs>
+  <use xlink:href="#icon" x="0" y="0" fill="#447e9b" />
+  <use xlink:href="#icon" x="0" y="1792" fill="#003366" />
+</svg>
diff --git a/interface/static/admin/img/icon-changelink.svg b/interface/static/admin/img/icon-changelink.svg
new file mode 100644
index 0000000..bbb137a
--- /dev/null
+++ b/interface/static/admin/img/icon-changelink.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#efb80b" d="M491 1536l91-91-235-235-91 91v107h128v128h107zm523-928q0-22-22-22-10 0-17 7l-542 542q-7 7-7 17 0 22 22 22 10 0 17-7l542-542q7-7 7-17zm-54-192l416 416-832 832h-416v-416zm683 96q0 53-37 90l-166 166-416-416 166-165q36-38 90-38 53 0 91 38l235 234q37 39 37 91z"/>
+</svg>
diff --git a/interface/static/admin/img/icon-clock.svg b/interface/static/admin/img/icon-clock.svg
new file mode 100644
index 0000000..bf9985d
--- /dev/null
+++ b/interface/static/admin/img/icon-clock.svg
@@ -0,0 +1,9 @@
+<svg width="16" height="32" viewBox="0 0 1792 3584" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <g id="icon">
+      <path d="M1024 544v448q0 14-9 23t-23 9h-320q-14 0-23-9t-9-23v-64q0-14 9-23t23-9h224v-352q0-14 9-23t23-9h64q14 0 23 9t9 23zm416 352q0-148-73-273t-198-198-273-73-273 73-198 198-73 273 73 273 198 198 273 73 273-73 198-198 73-273zm224 0q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+  </defs>
+  <use xlink:href="#icon" x="0" y="0" fill="#447e9b" />
+  <use xlink:href="#icon" x="0" y="1792" fill="#003366" />
+</svg>
diff --git a/interface/static/admin/img/icon-deletelink.svg b/interface/static/admin/img/icon-deletelink.svg
new file mode 100644
index 0000000..4059b15
--- /dev/null
+++ b/interface/static/admin/img/icon-deletelink.svg
@@ -0,0 +1,3 @@
+<svg width="14" height="14" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#dd4646" d="M1490 1322q0 40-28 68l-136 136q-28 28-68 28t-68-28l-294-294-294 294q-28 28-68 28t-68-28l-136-136q-28-28-28-68t28-68l294-294-294-294q-28-28-28-68t28-68l136-136q28-28 68-28t68 28l294 294 294-294q28-28 68-28t68 28l136 136q28 28 28 68t-28 68l-294 294 294 294q28 28 28 68z"/>
+</svg>
diff --git a/interface/static/admin/img/icon-no.svg b/interface/static/admin/img/icon-no.svg
new file mode 100644
index 0000000..2e0d383
--- /dev/null
+++ b/interface/static/admin/img/icon-no.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#dd4646" d="M1277 1122q0-26-19-45l-181-181 181-181q19-19 19-45 0-27-19-46l-90-90q-19-19-46-19-26 0-45 19l-181 181-181-181q-19-19-45-19-27 0-46 19l-90 90q-19 19-19 46 0 26 19 45l181 181-181 181q-19 19-19 45 0 27 19 46l90 90q19 19 46 19 26 0 45-19l181-181 181 181q19 19 45 19 27 0 46-19l90-90q19-19 19-46zm387-226q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+</svg>
diff --git a/interface/static/admin/img/icon-unknown-alt.svg b/interface/static/admin/img/icon-unknown-alt.svg
new file mode 100644
index 0000000..1c6b99f
--- /dev/null
+++ b/interface/static/admin/img/icon-unknown-alt.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#ffffff" d="M1024 1376v-192q0-14-9-23t-23-9h-192q-14 0-23 9t-9 23v192q0 14 9 23t23 9h192q14 0 23-9t9-23zm256-672q0-88-55.5-163t-138.5-116-170-41q-243 0-371 213-15 24 8 42l132 100q7 6 19 6 16 0 25-12 53-68 86-92 34-24 86-24 48 0 85.5 26t37.5 59q0 38-20 61t-68 45q-63 28-115.5 86.5t-52.5 125.5v36q0 14 9 23t23 9h192q14 0 23-9t9-23q0-19 21.5-49.5t54.5-49.5q32-18 49-28.5t46-35 44.5-48 28-60.5 12.5-81zm384 192q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+</svg>
diff --git a/interface/static/admin/img/icon-unknown.svg b/interface/static/admin/img/icon-unknown.svg
new file mode 100644
index 0000000..50b4f97
--- /dev/null
+++ b/interface/static/admin/img/icon-unknown.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#666666" d="M1024 1376v-192q0-14-9-23t-23-9h-192q-14 0-23 9t-9 23v192q0 14 9 23t23 9h192q14 0 23-9t9-23zm256-672q0-88-55.5-163t-138.5-116-170-41q-243 0-371 213-15 24 8 42l132 100q7 6 19 6 16 0 25-12 53-68 86-92 34-24 86-24 48 0 85.5 26t37.5 59q0 38-20 61t-68 45q-63 28-115.5 86.5t-52.5 125.5v36q0 14 9 23t23 9h192q14 0 23-9t9-23q0-19 21.5-49.5t54.5-49.5q32-18 49-28.5t46-35 44.5-48 28-60.5 12.5-81zm384 192q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+</svg>
diff --git a/interface/static/admin/img/icon-yes.svg b/interface/static/admin/img/icon-yes.svg
new file mode 100644
index 0000000..5883d87
--- /dev/null
+++ b/interface/static/admin/img/icon-yes.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#70bf2b" d="M1412 734q0-28-18-46l-91-90q-19-19-45-19t-45 19l-408 407-226-226q-19-19-45-19t-45 19l-91 90q-18 18-18 46 0 27 18 45l362 362q19 19 45 19 27 0 46-19l543-543q18-18 18-45zm252 162q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+</svg>
diff --git a/interface/static/admin/img/inline-delete.svg b/interface/static/admin/img/inline-delete.svg
new file mode 100644
index 0000000..17d1ad6
--- /dev/null
+++ b/interface/static/admin/img/inline-delete.svg
@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#999999" d="M1277 1122q0-26-19-45l-181-181 181-181q19-19 19-45 0-27-19-46l-90-90q-19-19-46-19-26 0-45 19l-181 181-181-181q-19-19-45-19-27 0-46 19l-90 90q-19 19-19 46 0 26 19 45l181 181-181 181q-19 19-19 45 0 27 19 46l90 90q19 19 46 19 26 0 45-19l181-181 181 181q19 19 45 19 27 0 46-19l90-90q19-19 19-46zm387-226q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+</svg>
diff --git a/interface/static/admin/img/search.svg b/interface/static/admin/img/search.svg
new file mode 100644
index 0000000..c8c69b2
--- /dev/null
+++ b/interface/static/admin/img/search.svg
@@ -0,0 +1,3 @@
+<svg width="15" height="15" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#555555" d="M1216 832q0-185-131.5-316.5t-316.5-131.5-316.5 131.5-131.5 316.5 131.5 316.5 316.5 131.5 316.5-131.5 131.5-316.5zm512 832q0 52-38 90t-90 38q-54 0-90-38l-343-342q-179 124-399 124-143 0-273.5-55.5t-225-150-150-225-55.5-273.5 55.5-273.5 150-225 225-150 273.5-55.5 273.5 55.5 225 150 150 225 55.5 273.5q0 220-124 399l343 343q37 37 37 90z"/>
+</svg>
diff --git a/interface/static/admin/img/selector-icons.svg b/interface/static/admin/img/selector-icons.svg
new file mode 100644
index 0000000..926b8e2
--- /dev/null
+++ b/interface/static/admin/img/selector-icons.svg
@@ -0,0 +1,34 @@
+<svg width="16" height="192" viewBox="0 0 1792 21504" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <g id="up">
+      <path d="M1412 895q0-27-18-45l-362-362-91-91q-18-18-45-18t-45 18l-91 91-362 362q-18 18-18 45t18 45l91 91q18 18 45 18t45-18l189-189v502q0 26 19 45t45 19h128q26 0 45-19t19-45v-502l189 189q19 19 45 19t45-19l91-91q18-18 18-45zm252 1q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+    <g id="down">
+      <path d="M1412 897q0-27-18-45l-91-91q-18-18-45-18t-45 18l-189 189v-502q0-26-19-45t-45-19h-128q-26 0-45 19t-19 45v502l-189-189q-19-19-45-19t-45 19l-91 91q-18 18-18 45t18 45l362 362 91 91q18 18 45 18t45-18l91-91 362-362q18-18 18-45zm252-1q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+    <g id="left">
+      <path d="M1408 960v-128q0-26-19-45t-45-19h-502l189-189q19-19 19-45t-19-45l-91-91q-18-18-45-18t-45 18l-362 362-91 91q-18 18-18 45t18 45l91 91 362 362q18 18 45 18t45-18l91-91q18-18 18-45t-18-45l-189-189h502q26 0 45-19t19-45zm256-64q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+    <g id="right">
+      <path d="M1413 896q0-27-18-45l-91-91-362-362q-18-18-45-18t-45 18l-91 91q-18 18-18 45t18 45l189 189h-502q-26 0-45 19t-19 45v128q0 26 19 45t45 19h502l-189 189q-19 19-19 45t19 45l91 91q18 18 45 18t45-18l362-362 91-91q18-18 18-45zm251 0q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+    <g id="clearall">
+      <path transform="translate(336, 336) scale(0.75)" d="M1037 1395l102-102q19-19 19-45t-19-45l-307-307 307-307q19-19 19-45t-19-45l-102-102q-19-19-45-19t-45 19l-454 454q-19 19-19 45t19 45l454 454q19 19 45 19t45-19zm627-499q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+    <g id="chooseall">
+      <path transform="translate(336, 336) scale(0.75)" d="M845 1395l454-454q19-19 19-45t-19-45l-454-454q-19-19-45-19t-45 19l-102 102q-19 19-19 45t19 45l307 307-307 307q-19 19-19 45t19 45l102 102q19 19 45 19t45-19zm819-499q0 209-103 385.5t-279.5 279.5-385.5 103-385.5-103-279.5-279.5-103-385.5 103-385.5 279.5-279.5 385.5-103 385.5 103 279.5 279.5 103 385.5z"/>
+    </g>
+  </defs>
+  <use xlink:href="#up" x="0" y="0" fill="#666666" />
+  <use xlink:href="#up" x="0" y="1792" fill="#447e9b" />
+  <use xlink:href="#down" x="0" y="3584" fill="#666666" />
+  <use xlink:href="#down" x="0" y="5376" fill="#447e9b" />
+  <use xlink:href="#left" x="0" y="7168" fill="#666666" />
+  <use xlink:href="#left" x="0" y="8960" fill="#447e9b" />
+  <use xlink:href="#right" x="0" y="10752" fill="#666666" />
+  <use xlink:href="#right" x="0" y="12544" fill="#447e9b" />
+  <use xlink:href="#clearall" x="0" y="14336" fill="#666666" />
+  <use xlink:href="#clearall" x="0" y="16128" fill="#447e9b" />
+  <use xlink:href="#chooseall" x="0" y="17920" fill="#666666" />
+  <use xlink:href="#chooseall" x="0" y="19712" fill="#447e9b" />
+</svg>
diff --git a/interface/static/admin/img/sorting-icons.svg b/interface/static/admin/img/sorting-icons.svg
new file mode 100644
index 0000000..7c31ec9
--- /dev/null
+++ b/interface/static/admin/img/sorting-icons.svg
@@ -0,0 +1,19 @@
+<svg width="14" height="84" viewBox="0 0 1792 10752" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <g id="sort">
+      <path d="M1408 1088q0 26-19 45l-448 448q-19 19-45 19t-45-19l-448-448q-19-19-19-45t19-45 45-19h896q26 0 45 19t19 45zm0-384q0 26-19 45t-45 19h-896q-26 0-45-19t-19-45 19-45l448-448q19-19 45-19t45 19l448 448q19 19 19 45z"/>
+    </g>
+    <g id="ascending">
+      <path d="M1408 1216q0 26-19 45t-45 19h-896q-26 0-45-19t-19-45 19-45l448-448q19-19 45-19t45 19l448 448q19 19 19 45z"/>
+    </g>
+    <g id="descending">
+      <path d="M1408 704q0 26-19 45l-448 448q-19 19-45 19t-45-19l-448-448q-19-19-19-45t19-45 45-19h896q26 0 45 19t19 45z"/>
+    </g>
+  </defs>
+  <use xlink:href="#sort" x="0" y="0" fill="#999999" />
+  <use xlink:href="#sort" x="0" y="1792" fill="#447e9b" />
+  <use xlink:href="#ascending" x="0" y="3584" fill="#999999" />
+  <use xlink:href="#ascending" x="0" y="5376" fill="#447e9b" />
+  <use xlink:href="#descending" x="0" y="7168" fill="#999999" />
+  <use xlink:href="#descending" x="0" y="8960" fill="#447e9b" />
+</svg>
diff --git a/interface/static/admin/img/tooltag-add.svg b/interface/static/admin/img/tooltag-add.svg
new file mode 100644
index 0000000..1ca64ae
--- /dev/null
+++ b/interface/static/admin/img/tooltag-add.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#ffffff" d="M1600 736v192q0 40-28 68t-68 28h-416v416q0 40-28 68t-68 28h-192q-40 0-68-28t-28-68v-416h-416q-40 0-68-28t-28-68v-192q0-40 28-68t68-28h416v-416q0-40 28-68t68-28h192q40 0 68 28t28 68v416h416q40 0 68 28t28 68z"/>
+</svg>
diff --git a/interface/static/admin/img/tooltag-arrowright.svg b/interface/static/admin/img/tooltag-arrowright.svg
new file mode 100644
index 0000000..b664d61
--- /dev/null
+++ b/interface/static/admin/img/tooltag-arrowright.svg
@@ -0,0 +1,3 @@
+<svg width="13" height="13" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
+  <path fill="#ffffff" d="M1363 877l-742 742q-19 19-45 19t-45-19l-166-166q-19-19-19-45t19-45l531-531-531-531q-19-19-19-45t19-45l166-166q19-19 45-19t45 19l742 742q19 19 19 45t-19 45z"/>
+</svg>
diff --git a/interface/static/admin/js/SelectBox.js b/interface/static/admin/js/SelectBox.js
new file mode 100644
index 0000000..95825d8
--- /dev/null
+++ b/interface/static/admin/js/SelectBox.js
@@ -0,0 +1,135 @@
+(function() {
+    'use strict';
+    var SelectBox = {
+        cache: {},
+        init: function(id) {
+            var box = document.getElementById(id);
+            var node;
+            SelectBox.cache[id] = [];
+            var cache = SelectBox.cache[id];
+            for (var i = 0, j = box.options.length; i < j; i++) {
+                node = box.options[i];
+                cache.push({value: node.value, text: node.text, displayed: 1});
+            }
+        },
+        redisplay: function(id) {
+            // Repopulate HTML select box from cache
+            var box = document.getElementById(id);
+            var node;
+            box.options.length = 0; // clear all options
+            var cache = SelectBox.cache[id];
+            for (var i = 0, j = cache.length; i < j; i++) {
+                node = cache[i];
+                if (node.displayed) {
+                    var new_option = new Option(node.text, node.value, false, false);
+                    // Shows a tooltip when hovering over the option
+                    new_option.setAttribute("title", node.text);
+                    box.options[box.options.length] = new_option;
+                }
+            }
+        },
+        filter: function(id, text) {
+            // Redisplay the HTML select box, displaying only the choices containing ALL
+            // the words in text. (It's an AND search.)
+            var tokens = text.toLowerCase().split(/\s+/);
+            var node, token;
+            var cache = SelectBox.cache[id];
+            for (var i = 0, j = cache.length; i < j; i++) {
+                node = cache[i];
+                node.displayed = 1;
+                var numTokens = tokens.length;
+                for (var k = 0; k < numTokens; k++) {
+                    token = tokens[k];
+                    if (node.text.toLowerCase().indexOf(token) === -1) {
+                        node.displayed = 0;
+                    }
+                }
+            }
+            SelectBox.redisplay(id);
+        },
+        delete_from_cache: function(id, value) {
+            var node, delete_index = null;
+            var cache = SelectBox.cache[id];
+            for (var i = 0, j = cache.length; i < j; i++) {
+                node = cache[i];
+                if (node.value === value) {
+                    delete_index = i;
+                    break;
+                }
+            }
+            var k = cache.length - 1;
+            for (i = delete_index; i < k; i++) {
+                cache[i] = cache[i + 1];
+            }
+            cache.length--;
+        },
+        add_to_cache: function(id, option) {
+            SelectBox.cache[id].push({value: option.value, text: option.text, displayed: 1});
+        },
+        cache_contains: function(id, value) {
+            // Check if an item is contained in the cache
+            var node;
+            var cache = SelectBox.cache[id];
+            for (var i = 0, j = cache.length; i < j; i++) {
+                node = cache[i];
+                if (node.value === value) {
+                    return true;
+                }
+            }
+            return false;
+        },
+        move: function(from, to) {
+            var from_box = document.getElementById(from);
+            var option;
+            var boxOptions = from_box.options;
+            for (var i = 0, j = boxOptions.length; i < j; i++) {
+                option = boxOptions[i];
+                if (option.selected && SelectBox.cache_contains(from, option.value)) {
+                    SelectBox.add_to_cache(to, {value: option.value, text: option.text, displayed: 1});
+                    SelectBox.delete_from_cache(from, option.value);
+                }
+            }
+            SelectBox.redisplay(from);
+            SelectBox.redisplay(to);
+        },
+        move_all: function(from, to) {
+            var from_box = document.getElementById(from);
+            var option;
+            var boxOptions = from_box.options;
+            for (var i = 0, j = boxOptions.length; i < j; i++) {
+                option = boxOptions[i];
+                if (SelectBox.cache_contains(from, option.value)) {
+                    SelectBox.add_to_cache(to, {value: option.value, text: option.text, displayed: 1});
+                    SelectBox.delete_from_cache(from, option.value);
+                }
+            }
+            SelectBox.redisplay(from);
+            SelectBox.redisplay(to);
+        },
+        sort: function(id) {
+            SelectBox.cache[id].sort(function(a, b) {
+                a = a.text.toLowerCase();
+                b = b.text.toLowerCase();
+                try {
+                    if (a > b) {
+                        return 1;
+                    }
+                    if (a < b) {
+                        return -1;
+                    }
+                }
+                catch (e) {
+                    // silently fail on IE 'unknown' exception
+                }
+                return 0;
+            } );
+        },
+        select_all: function(id) {
+            var box = document.getElementById(id);
+            for (var i = 0; i < box.options.length; i++) {
+                box.options[i].selected = 'selected';
+            }
+        }
+    };
+    window.SelectBox = SelectBox;
+})();
diff --git a/interface/static/admin/js/SelectFilter2.js b/interface/static/admin/js/SelectFilter2.js
new file mode 100644
index 0000000..acf3996
--- /dev/null
+++ b/interface/static/admin/js/SelectFilter2.js
@@ -0,0 +1,198 @@
+/*global SelectBox, addEvent, gettext, interpolate, quickElement, SelectFilter*/
+/*
+SelectFilter2 - Turns a multiple-select box into a filter interface.
+
+Requires core.js, SelectBox.js and addevent.js.
+*/
+(function($) {
+    'use strict';
+    function findForm(node) {
+        // returns the node of the form containing the given node
+        if (node.tagName.toLowerCase() !== 'form') {
+            return findForm(node.parentNode);
+        }
+        return node;
+    }
+
+    window.SelectFilter = {
+        init: function(field_id, field_name, is_stacked) {
+            if (field_id.match(/__prefix__/)) {
+                // Don't initialize on empty forms.
+                return;
+            }
+            var from_box = document.getElementById(field_id);
+            from_box.id += '_from'; // change its ID
+            from_box.className = 'filtered';
+
+            var ps = from_box.parentNode.getElementsByTagName('p');
+            for (var i = 0; i < ps.length; i++) {
+                if (ps[i].className.indexOf("info") !== -1) {
+                    // Remove <p class="info">, because it just gets in the way.
+                    from_box.parentNode.removeChild(ps[i]);
+                } else if (ps[i].className.indexOf("help") !== -1) {
+                    // Move help text up to the top so it isn't below the select
+                    // boxes or wrapped off on the side to the right of the add
+                    // button:
+                    from_box.parentNode.insertBefore(ps[i], from_box.parentNode.firstChild);
+                }
+            }
+
+            // <div class="selector"> or <div class="selector stacked">
+            var selector_div = quickElement('div', from_box.parentNode);
+            selector_div.className = is_stacked ? 'selector stacked' : 'selector';
+
+            // <div class="selector-available">
+            var selector_available = quickElement('div', selector_div);
+            selector_available.className = 'selector-available';
+            var title_available = quickElement('h2', selector_available, interpolate(gettext('Available %s') + ' ', [field_name]));
+            quickElement(
+                'span', title_available, '',
+                'class', 'help help-tooltip help-icon',
+                'title', interpolate(
+                    gettext(
+                        'This is the list of available %s. You may choose some by ' +
+                        'selecting them in the box below and then clicking the ' +
+                        '"Choose" arrow between the two boxes.'
+                    ),
+                    [field_name]
+                )
+            );
+
+            var filter_p = quickElement('p', selector_available, '', 'id', field_id + '_filter');
+            filter_p.className = 'selector-filter';
+
+            var search_filter_label = quickElement('label', filter_p, '', 'for', field_id + '_input');
+
+            quickElement(
+                'span', search_filter_label, '',
+                'class', 'help-tooltip search-label-icon',
+                'title', interpolate(gettext("Type into this box to filter down the list of available %s."), [field_name])
+            );
+
+            filter_p.appendChild(document.createTextNode(' '));
+
+            var filter_input = quickElement('input', filter_p, '', 'type', 'text', 'placeholder', gettext("Filter"));
+            filter_input.id = field_id + '_input';
+
+            selector_available.appendChild(from_box);
+            var choose_all = quickElement('a', selector_available, gettext('Choose all'), 'title', interpolate(gettext('Click to choose all %s at once.'), [field_name]), 'href', 'javascript:void(0);', 'id', field_id + '_add_all_link');
+            choose_all.className = 'selector-chooseall';
+
+            // <ul class="selector-chooser">
+            var selector_chooser = quickElement('ul', selector_div);
+            selector_chooser.className = 'selector-chooser';
+            var add_link = quickElement('a', quickElement('li', selector_chooser), gettext('Choose'), 'title', gettext('Choose'), 'href', 'javascript:void(0);', 'id', field_id + '_add_link');
+            add_link.className = 'selector-add';
+            var remove_link = quickElement('a', quickElement('li', selector_chooser), gettext('Remove'), 'title', gettext('Remove'), 'href', 'javascript:void(0);', 'id', field_id + '_remove_link');
+            remove_link.className = 'selector-remove';
+
+            // <div class="selector-chosen">
+            var selector_chosen = quickElement('div', selector_div);
+            selector_chosen.className = 'selector-chosen';
+            var title_chosen = quickElement('h2', selector_chosen, interpolate(gettext('Chosen %s') + ' ', [field_name]));
+            quickElement(
+                'span', title_chosen, '',
+                'class', 'help help-tooltip help-icon',
+                'title', interpolate(
+                    gettext(
+                        'This is the list of chosen %s. You may remove some by ' +
+                        'selecting them in the box below and then clicking the ' +
+                        '"Remove" arrow between the two boxes.'
+                    ),
+                    [field_name]
+                )
+            );
+
+            var to_box = quickElement('select', selector_chosen, '', 'id', field_id + '_to', 'multiple', 'multiple', 'size', from_box.size, 'name', from_box.getAttribute('name'));
+            to_box.className = 'filtered';
+            var clear_all = quickElement('a', selector_chosen, gettext('Remove all'), 'title', interpolate(gettext('Click to remove all chosen %s at once.'), [field_name]), 'href', 'javascript:void(0);', 'id', field_id + '_remove_all_link');
+            clear_all.className = 'selector-clearall';
+
+            from_box.setAttribute('name', from_box.getAttribute('name') + '_old');
+
+            // Set up the JavaScript event handlers for the select box filter interface
+            addEvent(choose_all, 'click', function() { SelectBox.move_all(field_id + '_from', field_id + '_to'); SelectFilter.refresh_icons(field_id); });
+            addEvent(add_link, 'click', function() { SelectBox.move(field_id + '_from', field_id + '_to'); SelectFilter.refresh_icons(field_id); });
+            addEvent(remove_link, 'click', function() { SelectBox.move(field_id + '_to', field_id + '_from'); SelectFilter.refresh_icons(field_id); });
+            addEvent(clear_all, 'click', function() { SelectBox.move_all(field_id + '_to', field_id + '_from'); SelectFilter.refresh_icons(field_id); });
+            addEvent(filter_input, 'keypress', function(e) { SelectFilter.filter_key_press(e, field_id); });
+            addEvent(filter_input, 'keyup', function(e) { SelectFilter.filter_key_up(e, field_id); });
+            addEvent(filter_input, 'keydown', function(e) { SelectFilter.filter_key_down(e, field_id); });
+            addEvent(from_box, 'change', function(e) { SelectFilter.refresh_icons(field_id); });
+            addEvent(to_box, 'change', function(e) { SelectFilter.refresh_icons(field_id); });
+            addEvent(from_box, 'dblclick', function() { SelectBox.move(field_id + '_from', field_id + '_to'); SelectFilter.refresh_icons(field_id); });
+            addEvent(to_box, 'dblclick', function() { SelectBox.move(field_id + '_to', field_id + '_from'); SelectFilter.refresh_icons(field_id); });
+            addEvent(findForm(from_box), 'submit', function() { SelectBox.select_all(field_id + '_to'); });
+            SelectBox.init(field_id + '_from');
+            SelectBox.init(field_id + '_to');
+            // Move selected from_box options to to_box
+            SelectBox.move(field_id + '_from', field_id + '_to');
+
+            if (!is_stacked) {
+                // In horizontal mode, give the same height to the two boxes.
+                var j_from_box = $(from_box);
+                var j_to_box = $(to_box);
+                var resize_filters = function() { j_to_box.height($(filter_p).outerHeight() + j_from_box.outerHeight()); };
+                if (j_from_box.outerHeight() > 0) {
+                    resize_filters(); // This fieldset is already open. Resize now.
+                } else {
+                    // This fieldset is probably collapsed. Wait for its 'show' event.
+                    j_to_box.closest('fieldset').one('show.fieldset', resize_filters);
+                }
+            }
+
+            // Initial icon refresh
+            SelectFilter.refresh_icons(field_id);
+        },
+        refresh_icons: function(field_id) {
+            var from = $('#' + field_id + '_from');
+            var to = $('#' + field_id + '_to');
+            var is_from_selected = from.find('option:selected').length > 0;
+            var is_to_selected = to.find('option:selected').length > 0;
+            // Active if at least one item is selected
+            $('#' + field_id + '_add_link').toggleClass('active', is_from_selected);
+            $('#' + field_id + '_remove_link').toggleClass('active', is_to_selected);
+            // Active if the corresponding box isn't empty
+            $('#' + field_id + '_add_all_link').toggleClass('active', from.find('option').length > 0);
+            $('#' + field_id + '_remove_all_link').toggleClass('active', to.find('option').length > 0);
+        },
+        filter_key_press: function(event, field_id) {
+            var from = document.getElementById(field_id + '_from');
+            // don't submit form if user pressed Enter
+            if ((event.which && event.which === 13) || (event.keyCode && event.keyCode === 13)) {
+                from.selectedIndex = 0;
+                SelectBox.move(field_id + '_from', field_id + '_to');
+                from.selectedIndex = 0;
+                event.preventDefault();
+                return false;
+            }
+        },
+        filter_key_up: function(event, field_id) {
+            var from = document.getElementById(field_id + '_from');
+            var temp = from.selectedIndex;
+            SelectBox.filter(field_id + '_from', document.getElementById(field_id + '_input').value);
+            from.selectedIndex = temp;
+            return true;
+        },
+        filter_key_down: function(event, field_id) {
+            var from = document.getElementById(field_id + '_from');
+            // right arrow -- move across
+            if ((event.which && event.which === 39) || (event.keyCode && event.keyCode === 39)) {
+                var old_index = from.selectedIndex;
+                SelectBox.move(field_id + '_from', field_id + '_to');
+                from.selectedIndex = (old_index === from.length) ? from.length - 1 : old_index;
+                return false;
+            }
+            // down arrow -- wrap around
+            if ((event.which && event.which === 40) || (event.keyCode && event.keyCode === 40)) {
+                from.selectedIndex = (from.length === from.selectedIndex + 1) ? 0 : from.selectedIndex + 1;
+            }
+            // up arrow -- wrap around
+            if ((event.which && event.which === 38) || (event.keyCode && event.keyCode === 38)) {
+                from.selectedIndex = (from.selectedIndex === 0) ? from.length - 1 : from.selectedIndex - 1;
+            }
+            return true;
+        }
+    };
+
+})(django.jQuery);
diff --git a/interface/static/admin/js/actions.js b/interface/static/admin/js/actions.js
new file mode 100644
index 0000000..95e8492
--- /dev/null
+++ b/interface/static/admin/js/actions.js
@@ -0,0 +1,146 @@
+/*global _actions_icnt, gettext, interpolate, ngettext*/
+(function($) {
+    'use strict';
+    var lastChecked;
+
+    $.fn.actions = function(opts) {
+        var options = $.extend({}, $.fn.actions.defaults, opts);
+        var actionCheckboxes = $(this);
+        var list_editable_changed = false;
+        var showQuestion = function() {
+            $(options.acrossClears).hide();
+            $(options.acrossQuestions).show();
+            $(options.allContainer).hide();
+        },
+        showClear = function() {
+            $(options.acrossClears).show();
+            $(options.acrossQuestions).hide();
+            $(options.actionContainer).toggleClass(options.selectedClass);
+            $(options.allContainer).show();
+            $(options.counterContainer).hide();
+        },
+        reset = function() {
+            $(options.acrossClears).hide();
+            $(options.acrossQuestions).hide();
+            $(options.allContainer).hide();
+            $(options.counterContainer).show();
+        },
+        clearAcross = function() {
+            reset();
+            $(options.acrossInput).val(0);
+            $(options.actionContainer).removeClass(options.selectedClass);
+        },
+        checker = function(checked) {
+            if (checked) {
+                showQuestion();
+            } else {
+                reset();
+            }
+            $(actionCheckboxes).prop("checked", checked)
+                .parent().parent().toggleClass(options.selectedClass, checked);
+        },
+        updateCounter = function() {
+            var sel = $(actionCheckboxes).filter(":checked").length;
+            // _actions_icnt is defined in the generated HTML
+            // and contains the total amount of objects in the queryset
+            $(options.counterContainer).html(interpolate(
+            ngettext('%(sel)s of %(cnt)s selected', '%(sel)s of %(cnt)s selected', sel), {
+                sel: sel,
+                cnt: _actions_icnt
+            }, true));
+            $(options.allToggle).prop("checked", function() {
+                var value;
+                if (sel === actionCheckboxes.length) {
+                    value = true;
+                    showQuestion();
+                } else {
+                    value = false;
+                    clearAcross();
+                }
+                return value;
+            });
+        };
+        // Show counter by default
+        $(options.counterContainer).show();
+        // Check state of checkboxes and reinit state if needed
+        $(this).filter(":checked").each(function(i) {
+            $(this).parent().parent().toggleClass(options.selectedClass);
+            updateCounter();
+            if ($(options.acrossInput).val() === 1) {
+                showClear();
+            }
+        });
+        $(options.allToggle).show().click(function() {
+            checker($(this).prop("checked"));
+            updateCounter();
+        });
+        $("a", options.acrossQuestions).click(function(event) {
+            event.preventDefault();
+            $(options.acrossInput).val(1);
+            showClear();
+        });
+        $("a", options.acrossClears).click(function(event) {
+            event.preventDefault();
+            $(options.allToggle).prop("checked", false);
+            clearAcross();
+            checker(0);
+            updateCounter();
+        });
+        lastChecked = null;
+        $(actionCheckboxes).click(function(event) {
+            if (!event) { event = window.event; }
+            var target = event.target ? event.target : event.srcElement;
+            if (lastChecked && $.data(lastChecked) !== $.data(target) && event.shiftKey === true) {
+                var inrange = false;
+                $(lastChecked).prop("checked", target.checked)
+                    .parent().parent().toggleClass(options.selectedClass, target.checked);
+                $(actionCheckboxes).each(function() {
+                    if ($.data(this) === $.data(lastChecked) || $.data(this) === $.data(target)) {
+                        inrange = (inrange) ? false : true;
+                    }
+                    if (inrange) {
+                        $(this).prop("checked", target.checked)
+                            .parent().parent().toggleClass(options.selectedClass, target.checked);
+                    }
+                });
+            }
+            $(target).parent().parent().toggleClass(options.selectedClass, target.checked);
+            lastChecked = target;
+            updateCounter();
+        });
+        $('form#changelist-form table#result_list tr').find('td:gt(0) :input').change(function() {
+            list_editable_changed = true;
+        });
+        $('form#changelist-form button[name="index"]').click(function(event) {
+            if (list_editable_changed) {
+                return confirm(gettext("You have unsaved changes on individual editable fields. If you run an action, your unsaved changes will be lost."));
+            }
+        });
+        $('form#changelist-form input[name="_save"]').click(function(event) {
+            var action_changed = false;
+            $('select option:selected', options.actionContainer).each(function() {
+                if ($(this).val()) {
+                    action_changed = true;
+                }
+            });
+            if (action_changed) {
+                if (list_editable_changed) {
+                    return confirm(gettext("You have selected an action, but you haven't saved your changes to individual fields yet. Please click OK to save. You'll need to re-run the action."));
+                } else {
+                    return confirm(gettext("You have selected an action, and you haven't made any changes on individual fields. You're probably looking for the Go button rather than the Save button."));
+                }
+            }
+        });
+    };
+    /* Setup plugin defaults */
+    $.fn.actions.defaults = {
+        actionContainer: "div.actions",
+        counterContainer: "span.action-counter",
+        allContainer: "div.actions span.all",
+        acrossInput: "div.actions input.select-across",
+        acrossQuestions: "div.actions span.question",
+        acrossClears: "div.actions span.clear",
+        allToggle: "#action-toggle",
+        selectedClass: "selected"
+    };
+})(django.jQuery);
diff --git a/interface/static/admin/js/actions.min.js b/interface/static/admin/js/actions.min.js
new file mode 100644
index 0000000..d0e87bc
--- /dev/null
+++ b/interface/static/admin/js/actions.min.js
@@ -0,0 +1,6 @@
+(function(a){var f;a.fn.actions=function(q){var b=a.extend({},a.fn.actions.defaults,q),g=a(this),e=!1,k=function(){a(b.acrossClears).hide();a(b.acrossQuestions).show();a(b.allContainer).hide()},l=function(){a(b.acrossClears).show();a(b.acrossQuestions).hide();a(b.actionContainer).toggleClass(b.selectedClass);a(b.allContainer).show();a(b.counterContainer).hide()},m=function(){a(b.acrossClears).hide();a(b.acrossQuestions).hide();a(b.allContainer).hide();a(b.counterContainer).show()},n=function(){m();
+a(b.acrossInput).val(0);a(b.actionContainer).removeClass(b.selectedClass)},p=function(c){c?k():m();a(g).prop("checked",c).parent().parent().toggleClass(b.selectedClass,c)},h=function(){var c=a(g).filter(":checked").length;a(b.counterContainer).html(interpolate(ngettext("%(sel)s of %(cnt)s selected","%(sel)s of %(cnt)s selected",c),{sel:c,cnt:_actions_icnt},!0));a(b.allToggle).prop("checked",function(){var a;c===g.length?(a=!0,k()):(a=!1,n());return a})};a(b.counterContainer).show();a(this).filter(":checked").each(function(c){a(this).parent().parent().toggleClass(b.selectedClass);
+h();1===a(b.acrossInput).val()&&l()});a(b.allToggle).show().click(function(){p(a(this).prop("checked"));h()});a("a",b.acrossQuestions).click(function(c){c.preventDefault();a(b.acrossInput).val(1);l()});a("a",b.acrossClears).click(function(c){c.preventDefault();a(b.allToggle).prop("checked",!1);n();p(0);h()});f=null;a(g).click(function(c){c||(c=window.event);var d=c.target?c.target:c.srcElement;if(f&&a.data(f)!==a.data(d)&&!0===c.shiftKey){var e=!1;a(f).prop("checked",d.checked).parent().parent().toggleClass(b.selectedClass,
+d.checked);a(g).each(function(){if(a.data(this)===a.data(f)||a.data(this)===a.data(d))e=e?!1:!0;e&&a(this).prop("checked",d.checked).parent().parent().toggleClass(b.selectedClass,d.checked)})}a(d).parent().parent().toggleClass(b.selectedClass,d.checked);f=d;h()});a("form#changelist-form table#result_list tr").find("td:gt(0) :input").change(function(){e=!0});a('form#changelist-form button[name="index"]').click(function(a){if(e)return confirm(gettext("You have unsaved changes on individual editable fields. If you run an action, your unsaved changes will be lost."))});
+a('form#changelist-form input[name="_save"]').click(function(c){var d=!1;a("select option:selected",b.actionContainer).each(function(){a(this).val()&&(d=!0)});if(d)return e?confirm(gettext("You have selected an action, but you haven't saved your changes to individual fields yet. Please click OK to save. You'll need to re-run the action.")):confirm(gettext("You have selected an action, and you haven't made any changes on individual fields. You're probably looking for the Go button rather than the Save button."))})};
+a.fn.actions.defaults={actionContainer:"div.actions",counterContainer:"span.action-counter",allContainer:"div.actions span.all",acrossInput:"div.actions input.select-across",acrossQuestions:"div.actions span.question",acrossClears:"div.actions span.clear",allToggle:"#action-toggle",selectedClass:"selected"}})(django.jQuery);
diff --git a/interface/static/admin/js/admin/DateTimeShortcuts.js b/interface/static/admin/js/admin/DateTimeShortcuts.js
new file mode 100644
index 0000000..1943935
--- /dev/null
+++ b/interface/static/admin/js/admin/DateTimeShortcuts.js
@@ -0,0 +1,364 @@
+/*global addEvent, Calendar, cancelEventPropagation, findPosX, findPosY, getStyle, get_format, gettext, interpolate, ngettext, quickElement, removeEvent*/
+// Inserts shortcut buttons after all of the following:
+//     <input type="text" class="vDateField">
+//     <input type="text" class="vTimeField">
+(function() {
+    'use strict';
+    var DateTimeShortcuts = {
+        calendars: [],
+        calendarInputs: [],
+        clockInputs: [],
+        dismissClockFunc: [],
+        dismissCalendarFunc: [],
+        calendarDivName1: 'calendarbox', // name of calendar <div> that gets toggled
+        calendarDivName2: 'calendarin',  // name of <div> that contains calendar
+        calendarLinkName: 'calendarlink',// name of the link that is used to toggle
+        clockDivName: 'clockbox',        // name of clock <div> that gets toggled
+        clockLinkName: 'clocklink',      // name of the link that is used to toggle
+        shortCutsClass: 'datetimeshortcuts', // class of the clock and cal shortcuts
+        timezoneWarningClass: 'timezonewarning', // class of the warning for timezone mismatch
+        timezoneOffset: 0,
+        init: function() {
+            var body = document.getElementsByTagName('body')[0];
+            var serverOffset = body.getAttribute('data-admin-utc-offset');
+            if (serverOffset) {
+                var localOffset = new Date().getTimezoneOffset() * -60;
+                DateTimeShortcuts.timezoneOffset = localOffset - serverOffset;
+            }
+
+            var inputs = document.getElementsByTagName('input');
+            for (var i = 0; i < inputs.length; i++) {
+                var inp = inputs[i];
+                if (inp.getAttribute('type') === 'text' && inp.className.match(/vTimeField/)) {
+                    DateTimeShortcuts.addClock(inp);
+                    DateTimeShortcuts.addTimezoneWarning(inp);
+                }
+                else if (inp.getAttribute('type') === 'text' && inp.className.match(/vDateField/)) {
+                    DateTimeShortcuts.addCalendar(inp);
+                    DateTimeShortcuts.addTimezoneWarning(inp);
+                }
+            }
+        },
+        // Return the current time while accounting for the server timezone.
+        now: function() {
+            var body = document.getElementsByTagName('body')[0];
+            var serverOffset = body.getAttribute('data-admin-utc-offset');
+            if (serverOffset) {
+                var localNow = new Date();
+                var localOffset = localNow.getTimezoneOffset() * -60;
+                localNow.setTime(localNow.getTime() + 1000 * (serverOffset - localOffset));
+                return localNow;
+            } else {
+                return new Date();
+            }
+        },
+        // Add a warning when the time zone in the browser and backend do not match.
+        addTimezoneWarning: function(inp) {
+            var $ = django.jQuery;
+            var warningClass = DateTimeShortcuts.timezoneWarningClass;
+            var timezoneOffset = DateTimeShortcuts.timezoneOffset / 3600;
+
+            // Only warn if there is a time zone mismatch.
+            if (!timezoneOffset) {
+                return;
+            }
+
+            // Check if warning is already there.
+            if ($(inp).siblings('.' + warningClass).length) {
+                return;
+            }
+
+            var message;
+            if (timezoneOffset > 0) {
+                message = ngettext(
+                    'Note: You are %s hour ahead of server time.',
+                    'Note: You are %s hours ahead of server time.',
+                    timezoneOffset
+                );
+            }
+            else {
+                timezoneOffset *= -1;
+                message = ngettext(
+                    'Note: You are %s hour behind server time.',
+                    'Note: You are %s hours behind server time.',
+                    timezoneOffset
+                );
+            }
+            message = interpolate(message, [timezoneOffset]);
+
+            var $warning = $('<span>');
+            $warning.attr('class', warningClass);
+            $warning.text(message);
+
+            $(inp).parent()
+                .append($('<br>'))
+                .append($warning);
+        },
+        // Add clock widget to a given field
+        addClock: function(inp) {
+            var num = DateTimeShortcuts.clockInputs.length;
+            DateTimeShortcuts.clockInputs[num] = inp;
+            DateTimeShortcuts.dismissClockFunc[num] = function() { DateTimeShortcuts.dismissClock(num); return true; };
+
+            // Shortcut links (clock icon and "Now" link)
+            var shortcuts_span = document.createElement('span');
+            shortcuts_span.className = DateTimeShortcuts.shortCutsClass;
+            inp.parentNode.insertBefore(shortcuts_span, inp.nextSibling);
+            var now_link = document.createElement('a');
+            now_link.setAttribute('href', "javascript:DateTimeShortcuts.handleClockQuicklink(" + num + ", -1);");
+            now_link.appendChild(document.createTextNode(gettext('Now')));
+            var clock_link = document.createElement('a');
+            clock_link.setAttribute('href', 'javascript:DateTimeShortcuts.openClock(' + num + ');');
+            clock_link.id = DateTimeShortcuts.clockLinkName + num;
+            quickElement(
+                'span', clock_link, '',
+                'class', 'clock-icon',
+                'title', gettext('Choose a Time')
+            );
+            shortcuts_span.appendChild(document.createTextNode('\u00A0'));
+            shortcuts_span.appendChild(now_link);
+            shortcuts_span.appendChild(document.createTextNode('\u00A0|\u00A0'));
+            shortcuts_span.appendChild(clock_link);
+
+            // Create clock link div
+            //
+            // Markup looks like:
+            // <div id="clockbox1" class="clockbox module">
+            //     <h2>Choose a time</h2>
+            //     <ul class="timelist">
+            //         <li><a href="#">Now</a></li>
+            //         <li><a href="#">Midnight</a></li>
+            //         <li><a href="#">6 a.m.</a></li>
+            //         <li><a href="#">Noon</a></li>
+            //         <li><a href="#">6 p.m.</a></li>
+            //     </ul>
+            //     <p class="calendar-cancel"><a href="#">Cancel</a></p>
+            // </div>
+
+            var clock_box = document.createElement('div');
+            clock_box.style.display = 'none';
+            clock_box.style.position = 'absolute';
+            clock_box.className = 'clockbox module';
+            clock_box.setAttribute('id', DateTimeShortcuts.clockDivName + num);
+            document.body.appendChild(clock_box);
+            addEvent(clock_box, 'click', cancelEventPropagation);
+
+            quickElement('h2', clock_box, gettext('Choose a time'));
+            var time_list = quickElement('ul', clock_box);
+            time_list.className = 'timelist';
+            quickElement("a", quickElement("li", time_list), gettext("Now"), "href", "javascript:DateTimeShortcuts.handleClockQuicklink(" + num + ", -1);");
+            quickElement("a", quickElement("li", time_list), gettext("Midnight"), "href", "javascript:DateTimeShortcuts.handleClockQuicklink(" + num + ", 0);");
+            quickElement("a", quickElement("li", time_list), gettext("6 a.m."), "href", "javascript:DateTimeShortcuts.handleClockQuicklink(" + num + ", 6);");
+            quickElement("a", quickElement("li", time_list), gettext("Noon"), "href", "javascript:DateTimeShortcuts.handleClockQuicklink(" + num + ", 12);");
+            quickElement("a", quickElement("li", time_list), gettext("6 p.m."), "href", "javascript:DateTimeShortcuts.handleClockQuicklink(" + num + ", 18);");
+
+            var cancel_p = quickElement('p', clock_box);
+            cancel_p.className = 'calendar-cancel';
+            quickElement('a', cancel_p, gettext('Cancel'), 'href', 'javascript:DateTimeShortcuts.dismissClock(' + num + ');');
+            django.jQuery(document).bind('keyup', function(event) {
+                if (event.which === 27) {
+                    // ESC key closes popup
+                    DateTimeShortcuts.dismissClock(num);
+                    event.preventDefault();
+                }
+            });
+        },
+        openClock: function(num) {
+            var clock_box = document.getElementById(DateTimeShortcuts.clockDivName + num);
+            var clock_link = document.getElementById(DateTimeShortcuts.clockLinkName + num);
+
+            // Recalculate the clockbox position
+            // is it left-to-right or right-to-left layout ?
+            if (getStyle(document.body, 'direction') !== 'rtl') {
+                clock_box.style.left = findPosX(clock_link) + 17 + 'px';
+            }
+            else {
+                // since style's width is in em, it'd be tough to calculate
+                // px value of it. let's use an estimated px for now
+                // TODO: IE returns wrong value for findPosX when in rtl mode
+                //       (it returns as it was left aligned), needs to be fixed.
+                clock_box.style.left = findPosX(clock_link) - 110 + 'px';
+            }
+            clock_box.style.top = Math.max(0, findPosY(clock_link) - 30) + 'px';
+
+            // Show the clock box
+            clock_box.style.display = 'block';
+            addEvent(document, 'click', DateTimeShortcuts.dismissClockFunc[num]);
+        },
+        dismissClock: function(num) {
+            document.getElementById(DateTimeShortcuts.clockDivName + num).style.display = 'none';
+            removeEvent(document, 'click', DateTimeShortcuts.dismissClockFunc[num]);
+        },
+        handleClockQuicklink: function(num, val) {
+            var d;
+            if (val === -1) {
+                d = DateTimeShortcuts.now();
+            }
+            else {
+                d = new Date(1970, 1, 1, val, 0, 0, 0);
+            }
+            DateTimeShortcuts.clockInputs[num].value = d.strftime(get_format('TIME_INPUT_FORMATS')[0]);
+            DateTimeShortcuts.clockInputs[num].focus();
+            DateTimeShortcuts.dismissClock(num);
+        },
+        // Add calendar widget to a given field.
+        addCalendar: function(inp) {
+            var num = DateTimeShortcuts.calendars.length;
+
+            DateTimeShortcuts.calendarInputs[num] = inp;
+            DateTimeShortcuts.dismissCalendarFunc[num] = function() { DateTimeShortcuts.dismissCalendar(num); return true; };
+
+            // Shortcut links (calendar icon and "Today" link)
+            var shortcuts_span = document.createElement('span');
+            shortcuts_span.className = DateTimeShortcuts.shortCutsClass;
+            inp.parentNode.insertBefore(shortcuts_span, inp.nextSibling);
+            var today_link = document.createElement('a');
+            today_link.setAttribute('href', 'javascript:DateTimeShortcuts.handleCalendarQuickLink(' + num + ', 0);');
+            today_link.appendChild(document.createTextNode(gettext('Today')));
+            var cal_link = document.createElement('a');
+            cal_link.setAttribute('href', 'javascript:DateTimeShortcuts.openCalendar(' + num + ');');
+            cal_link.id = DateTimeShortcuts.calendarLinkName + num;
+            quickElement(
+                'span', cal_link, '',
+                'class', 'date-icon',
+                'title', gettext('Choose a Date')
+            );
+            shortcuts_span.appendChild(document.createTextNode('\u00A0'));
+            shortcuts_span.appendChild(today_link);
+            shortcuts_span.appendChild(document.createTextNode('\u00A0|\u00A0'));
+            shortcuts_span.appendChild(cal_link);
+
+            // Create calendarbox div.
+            //
+            // Markup looks like:
+            //
+            // <div id="calendarbox3" class="calendarbox module">
+            //     <h2>
+            //           <a href="#" class="link-previous">&lsaquo;</a>
+            //           <a href="#" class="link-next">&rsaquo;</a> February 2003
+            //     </h2>
+            //     <div class="calendar" id="calendarin3">
+            //         <!-- (cal) -->
+            //     </div>
+            //     <div class="calendar-shortcuts">
+            //          <a href="#">Yesterday</a> | <a href="#">Today</a> | <a href="#">Tomorrow</a>
+            //     </div>
+            //     <p class="calendar-cancel"><a href="#">Cancel</a></p>
+            // </div>
+            var cal_box = document.createElement('div');
+            cal_box.style.display = 'none';
+            cal_box.style.position = 'absolute';
+            cal_box.className = 'calendarbox module';
+            cal_box.setAttribute('id', DateTimeShortcuts.calendarDivName1 + num);
+            document.body.appendChild(cal_box);
+            addEvent(cal_box, 'click', cancelEventPropagation);
+
+            // next-prev links
+            var cal_nav = quickElement('div', cal_box);
+            var cal_nav_prev = quickElement('a', cal_nav, '<', 'href', 'javascript:DateTimeShortcuts.drawPrev(' + num + ');');
+            cal_nav_prev.className = 'calendarnav-previous';
+            var cal_nav_next = quickElement('a', cal_nav, '>', 'href', 'javascript:DateTimeShortcuts.drawNext(' + num + ');');
+            cal_nav_next.className = 'calendarnav-next';
+
+            // main box
+            var cal_main = quickElement('div', cal_box, '', 'id', DateTimeShortcuts.calendarDivName2 + num);
+            cal_main.className = 'calendar';
+            DateTimeShortcuts.calendars[num] = new Calendar(DateTimeShortcuts.calendarDivName2 + num, DateTimeShortcuts.handleCalendarCallback(num));
+            DateTimeShortcuts.calendars[num].drawCurrent();
+
+            // calendar shortcuts
+            var shortcuts = quickElement('div', cal_box);
+            shortcuts.className = 'calendar-shortcuts';
+            quickElement('a', shortcuts, gettext('Yesterday'), 'href', 'javascript:DateTimeShortcuts.handleCalendarQuickLink(' + num + ', -1);');
+            shortcuts.appendChild(document.createTextNode('\u00A0|\u00A0'));
+            quickElement('a', shortcuts, gettext('Today'), 'href', 'javascript:DateTimeShortcuts.handleCalendarQuickLink(' + num + ', 0);');
+            shortcuts.appendChild(document.createTextNode('\u00A0|\u00A0'));
+            quickElement('a', shortcuts, gettext('Tomorrow'), 'href', 'javascript:DateTimeShortcuts.handleCalendarQuickLink(' + num + ', +1);');
+
+            // cancel bar
+            var cancel_p = quickElement('p', cal_box);
+            cancel_p.className = 'calendar-cancel';
+            quickElement('a', cancel_p, gettext('Cancel'), 'href', 'javascript:DateTimeShortcuts.dismissCalendar(' + num + ');');
+            django.jQuery(document).bind('keyup', function(event) {
+                if (event.which === 27) {
+                    // ESC key closes popup
+                    DateTimeShortcuts.dismissCalendar(num);
+                    event.preventDefault();
+                }
+            });
+        },
+        openCalendar: function(num) {
+            var cal_box = document.getElementById(DateTimeShortcuts.calendarDivName1 + num);
+            var cal_link = document.getElementById(DateTimeShortcuts.calendarLinkName + num);
+            var inp = DateTimeShortcuts.calendarInputs[num];
+
+            // Determine if the current value in the input has a valid date.
+            // If so, draw the calendar with that date's year and month.
+            if (inp.value) {
+                var format = get_format('DATE_INPUT_FORMATS')[0];
+                var selected = inp.value.strptime(format);
+                var year = selected.getUTCFullYear();
+                var month = selected.getUTCMonth() + 1;
+                var re = /\d{4}/;
+                if (re.test(year.toString()) && month >= 1 && month <= 12) {
+                    DateTimeShortcuts.calendars[num].drawDate(month, year, selected);
+                }
+            }
+
+            // Recalculate the clockbox position
+            // is it left-to-right or right-to-left layout ?
+            if (getStyle(document.body, 'direction') !== 'rtl') {
+                cal_box.style.left = findPosX(cal_link) + 17 + 'px';
+            }
+            else {
+                // since style's width is in em, it'd be tough to calculate
+                // px value of it. let's use an estimated px for now
+                // TODO: IE returns wrong value for findPosX when in rtl mode
+                //       (it returns as it was left aligned), needs to be fixed.
+                cal_box.style.left = findPosX(cal_link) - 180 + 'px';
+            }
+            cal_box.style.top = Math.max(0, findPosY(cal_link) - 75) + 'px';
+
+            cal_box.style.display = 'block';
+            addEvent(document, 'click', DateTimeShortcuts.dismissCalendarFunc[num]);
+        },
+        dismissCalendar: function(num) {
+            document.getElementById(DateTimeShortcuts.calendarDivName1 + num).style.display = 'none';
+            removeEvent(document, 'click', DateTimeShortcuts.dismissCalendarFunc[num]);
+        },
+        drawPrev: function(num) {
+            DateTimeShortcuts.calendars[num].drawPreviousMonth();
+        },
+        drawNext: function(num) {
+            DateTimeShortcuts.calendars[num].drawNextMonth();
+        },
+        handleCalendarCallback: function(num) {
+            var format = get_format('DATE_INPUT_FORMATS')[0];
+            // the format needs to be escaped a little
+            format = format.replace('\\', '\\\\');
+            format = format.replace('\r', '\\r');
+            format = format.replace('\n', '\\n');
+            format = format.replace('\t', '\\t');
+            format = format.replace("'", "\\'");
+            return ["function(y, m, d) { DateTimeShortcuts.calendarInputs[",
+                   num,
+                   "].value = new Date(y, m-1, d).strftime('",
+                   format,
+                   "');DateTimeShortcuts.calendarInputs[",
+                   num,
+                   "].focus();document.getElementById(DateTimeShortcuts.calendarDivName1+",
+                   num,
+                   ").style.display='none';}"].join('');
+        },
+        handleCalendarQuickLink: function(num, offset) {
+            var d = DateTimeShortcuts.now();
+            d.setDate(d.getDate() + offset);
+            DateTimeShortcuts.calendarInputs[num].value = d.strftime(get_format('DATE_INPUT_FORMATS')[0]);
+            DateTimeShortcuts.calendarInputs[num].focus();
+            DateTimeShortcuts.dismissCalendar(num);
+        }
+    };
+
+    addEvent(window, 'load', DateTimeShortcuts.init);
+    window.DateTimeShortcuts = DateTimeShortcuts;
+})();
diff --git a/interface/static/admin/js/admin/RelatedObjectLookups.js b/interface/static/admin/js/admin/RelatedObjectLookups.js
new file mode 100644
index 0000000..4ac9baa
--- /dev/null
+++ b/interface/static/admin/js/admin/RelatedObjectLookups.js
@@ -0,0 +1,189 @@
+/*global SelectBox, interpolate*/
+// Handles related-objects functionality: lookup link for raw_id_fields
+// and Add Another links.
+
+(function($) {
+    'use strict';
+
+    function html_unescape(text) {
+        // Unescape a string that was escaped using django.utils.html.escape.
+        text = text.replace(/&lt;/g, '<');
+        text = text.replace(/&gt;/g, '>');
+        text = text.replace(/&quot;/g, '"');
+        text = text.replace(/&#39;/g, "'");
+        text = text.replace(/&amp;/g, '&');
+        return text;
+    }
+
+    // IE doesn't accept periods or dashes in the window name, but the element IDs
+    // we use to generate popup window names may contain them, therefore we map them
+    // to allowed characters in a reversible way so that we can locate the correct
+    // element when the popup window is dismissed.
+    function id_to_windowname(text) {
+        text = text.replace(/\./g, '__dot__');
+        text = text.replace(/\-/g, '__dash__');
+        return text;
+    }
+
+    function windowname_to_id(text) {
+        text = text.replace(/__dot__/g, '.');
+        text = text.replace(/__dash__/g, '-');
+        return text;
+    }
+
+    function showAdminPopup(triggeringLink, name_regexp, add_popup) {
+        var name = triggeringLink.id.replace(name_regexp, '');
+        name = id_to_windowname(name);
+        var href = triggeringLink.href;
+        if (add_popup) {
+            if (href.indexOf('?') === -1) {
+                href += '?_popup=1';
+            } else {
+                href += '&_popup=1';
+            }
+        }
+        var win = window.open(href, name, 'height=500,width=800,resizable=yes,scrollbars=yes');
+        win.focus();
+        return false;
+    }
+
+    function showRelatedObjectLookupPopup(triggeringLink) {
+        return showAdminPopup(triggeringLink, /^lookup_/, true);
+    }
+
+    function dismissRelatedLookupPopup(win, chosenId) {
+        var name = windowname_to_id(win.name);
+        var elem = document.getElementById(name);
+        if (elem.className.indexOf('vManyToManyRawIdAdminField') !== -1 && elem.value) {
+            elem.value += ',' + chosenId;
+        } else {
+            document.getElementById(name).value = chosenId;
+        }
+        win.close();
+    }
+
+    function showRelatedObjectPopup(triggeringLink) {
+        return showAdminPopup(triggeringLink, /^(change|add|delete)_/, false);
+    }
+
+    function updateRelatedObjectLinks(triggeringLink) {
+        var $this = django.jQuery(triggeringLink);
+        var siblings = $this.nextAll('.change-related, .delete-related');
+        if (!siblings.length) {
+            return;
+        }
+        var value = $this.val();
+        if (value) {
+            siblings.each(function() {
+                var elm = django.jQuery(this);
+                elm.attr('href', elm.attr('data-href-template').replace('__fk__', value));
+            });
+        } else {
+            siblings.removeAttr('href');
+        }
+    }
+
+    function dismissAddRelatedObjectPopup(win, newId, newRepr) {
+        // newId and newRepr are expected to have previously been escaped by
+        // django.utils.html.escape.
+        newId = html_unescape(newId);
+        newRepr = html_unescape(newRepr);
+        var name = windowname_to_id(win.name);
+        var elem = document.getElementById(name);
+        if (elem) {
+            var elemName = elem.nodeName.toUpperCase();
+            if (elemName === 'SELECT') {
+                elem.options[elem.options.length] = new Option(newRepr, newId, true, true);
+            } else if (elemName === 'INPUT') {
+                if (elem.className.indexOf('vManyToManyRawIdAdminField') !== -1 && elem.value) {
+                    elem.value += ',' + newId;
+                } else {
+                    elem.value = newId;
+                }
+            }
+            // Trigger a change event to update related links if required.
+            django.jQuery(elem).trigger('change');
+        } else {
+            var toId = name + "_to";
+            var o = new Option(newRepr, newId);
+            SelectBox.add_to_cache(toId, o);
+            SelectBox.redisplay(toId);
+        }
+        win.close();
+    }
+
+    function dismissChangeRelatedObjectPopup(win, objId, newRepr, newId) {
+        objId = html_unescape(objId);
+        newRepr = html_unescape(newRepr);
+        var id = windowname_to_id(win.name).replace(/^edit_/, '');
+        var selectsSelector = interpolate('#%s, #%s_from, #%s_to', [id, id, id]);
+        var selects = django.jQuery(selectsSelector);
+        selects.find('option').each(function() {
+            if (this.value === objId) {
+                this.innerHTML = newRepr;
+                this.value = newId;
+            }
+        });
+        win.close();
+    }
+
+    function dismissDeleteRelatedObjectPopup(win, objId) {
+        objId = html_unescape(objId);
+        var id = windowname_to_id(win.name).replace(/^delete_/, '');
+        var selectsSelector = interpolate('#%s, #%s_from, #%s_to', [id, id, id]);
+        var selects = django.jQuery(selectsSelector);
+        selects.find('option').each(function() {
+            if (this.value === objId) {
+                django.jQuery(this).remove();
+            }
+        }).trigger('change');
+        win.close();
+    }
+
+    // Global for testing purposes
+    window.html_unescape = html_unescape;
+    window.id_to_windowname = id_to_windowname;
+    window.windowname_to_id = windowname_to_id;
+
+    window.showRelatedObjectLookupPopup = showRelatedObjectLookupPopup;
+    window.dismissRelatedLookupPopup = dismissRelatedLookupPopup;
+    window.showRelatedObjectPopup = showRelatedObjectPopup;
+    window.updateRelatedObjectLinks = updateRelatedObjectLinks;
+    window.dismissAddRelatedObjectPopup = dismissAddRelatedObjectPopup;
+    window.dismissChangeRelatedObjectPopup = dismissChangeRelatedObjectPopup;
+    window.dismissDeleteRelatedObjectPopup = dismissDeleteRelatedObjectPopup;
+
+    // Kept for backward compatibility
+    window.showAddAnotherPopup = showRelatedObjectPopup;
+    window.dismissAddAnotherPopup = dismissAddRelatedObjectPopup;
+
+    $(document).ready(function() {
+        $('body').on('click', '.related-widget-wrapper-link', function(e) {
+            e.preventDefault();
+            if (this.href) {
+                var event = $.Event('django:show-related', {href: this.href});
+                $(this).trigger(event);
+                if (!event.isDefaultPrevented()) {
+                    showRelatedObjectPopup(this);
+                }
+            }
+        });
+        $('body').on('change', '.related-widget-wrapper select', function(e) {
+            var event = $.Event('django:update-related');
+            $(this).trigger(event);
+            if (!event.isDefaultPrevented()) {
+                updateRelatedObjectLinks(this);
+            }
+        });
+        $('.related-widget-wrapper select').trigger('change');
+        $('.related-lookup').click(function(e) {
+            e.preventDefault();
+            var event = $.Event('django:lookup-related');
+            $(this).trigger(event);
+            if (!event.isDefaultPrevented()) {
+                showRelatedObjectLookupPopup(this);
+            }
+        });
+    });
+
+})(django.jQuery);
diff --git a/interface/static/admin/js/calendar.js b/interface/static/admin/js/calendar.js
new file mode 100644
index 0000000..1043dd6
--- /dev/null
+++ b/interface/static/admin/js/calendar.js
@@ -0,0 +1,178 @@
+/*global gettext, get_format, quickElement, removeChildren*/
+/*
+calendar.js - Calendar functions by Adrian Holovaty
+depends on core.js for utility functions like removeChildren or quickElement
+*/
+
+(function() {
+    'use strict';
+    // CalendarNamespace -- Provides a collection of HTML calendar-related helper functions
+    var CalendarNamespace = {
+        monthsOfYear: gettext('January February March April May June July August September October November December').split(' '),
+        daysOfWeek: gettext('S M T W T F S').split(' '),
+        firstDayOfWeek: parseInt(get_format('FIRST_DAY_OF_WEEK')),
+        isLeapYear: function(year) {
+            return (((year % 4) === 0) && ((year % 100) !== 0 ) || ((year % 400) === 0));
+        },
+        getDaysInMonth: function(month, year) {
+            var days;
+            if (month === 1 || month === 3 || month === 5 || month === 7 || month === 8 || month === 10 || month === 12) {
+                days = 31;
+            }
+            else if (month === 4 || month === 6 || month === 9 || month === 11) {
+                days = 30;
+            }
+            else if (month === 2 && CalendarNamespace.isLeapYear(year)) {
+                days = 29;
+            }
+            else {
+                days = 28;
+            }
+            return days;
+        },
+        draw: function(month, year, div_id, callback, selected) { // month = 1-12, year = 1-9999
+            var today = new Date();
+            var todayDay = today.getDate();
+            var todayMonth = today.getMonth() + 1;
+            var todayYear = today.getFullYear();
+            var todayClass = '';
+
+            // Use UTC functions here because the date field does not contain time
+            // and using the UTC function variants prevent the local time offset
+            // from altering the date, specifically the day field.  For example:
+            //
+            // ```
+            // var x = new Date('2013-10-02');
+            // var day = x.getDate();
+            // ```
+            //
+            // The day variable above will be 1 instead of 2 in, say, US Pacific time
+            // zone.
+            var isSelectedMonth = false;
+            if (typeof selected !== 'undefined') {
+                isSelectedMonth = (selected.getUTCFullYear() === year && (selected.getUTCMonth() + 1) === month);
+            }
+
+            month = parseInt(month);
+            year = parseInt(year);
+            var calDiv = document.getElementById(div_id);
+            removeChildren(calDiv);
+            var calTable = document.createElement('table');
+            quickElement('caption', calTable, CalendarNamespace.monthsOfYear[month - 1] + ' ' + year);
+            var tableBody = quickElement('tbody', calTable);
+
+            // Draw days-of-week header
+            var tableRow = quickElement('tr', tableBody);
+            for (var i = 0; i < 7; i++) {
+                quickElement('th', tableRow, CalendarNamespace.daysOfWeek[(i + CalendarNamespace.firstDayOfWeek) % 7]);
+            }
+
+            var startingPos = new Date(year, month - 1, 1 - CalendarNamespace.firstDayOfWeek).getDay();
+            var days = CalendarNamespace.getDaysInMonth(month, year);
+
+            var nonDayCell;
+
+            // Draw blanks before first of month
+            tableRow = quickElement('tr', tableBody);
+            for (i = 0; i < startingPos; i++) {
+                nonDayCell = quickElement('td', tableRow, ' ');
+                nonDayCell.className = "nonday";
+            }
+
+            // Draw days of month
+            var currentDay = 1;
+            for (i = startingPos; currentDay <= days; i++) {
+                if (i % 7 === 0 && currentDay !== 1) {
+                    tableRow = quickElement('tr', tableBody);
+                }
+                if ((currentDay === todayDay) && (month === todayMonth) && (year === todayYear)) {
+                    todayClass = 'today';
+                } else {
+                    todayClass = '';
+                }
+
+                // use UTC function; see above for explanation.
+                if (isSelectedMonth && currentDay === selected.getUTCDate()) {
+                    if (todayClass !== '') {
+                        todayClass += " ";
+                    }
+                    todayClass += "selected";
+                }
+
+                var cell = quickElement('td', tableRow, '', 'class', todayClass);
+
+                quickElement('a', cell, currentDay, 'href', 'javascript:void(' + callback + '(' + year + ',' + month + ',' + currentDay + '));');
+                currentDay++;
+            }
+
+            // Draw blanks after end of month (optional, but makes for valid code)
+            while (tableRow.childNodes.length < 7) {
+                nonDayCell = quickElement('td', tableRow, ' ');
+                nonDayCell.className = "nonday";
+            }
+
+            calDiv.appendChild(calTable);
+        }
+    };
+
+    // Calendar -- A calendar instance
+    function Calendar(div_id, callback, selected) {
+        // div_id (string) is the ID of the element in which the calendar will
+        //     be displayed
+        // callback (string) is the name of a JavaScript function that will be
+        //     called with the parameters (year, month, day) when a day in the
+        //     calendar is clicked
+        this.div_id = div_id;
+        this.callback = callback;
+        this.today = new Date();
+        this.currentMonth = this.today.getMonth() + 1;
+        this.currentYear = this.today.getFullYear();
+        if (typeof selected !== 'undefined') {
+            this.selected = selected;
+        }
+    }
+    Calendar.prototype = {
+        drawCurrent: function() {
+            CalendarNamespace.draw(this.currentMonth, this.currentYear, this.div_id, this.callback, this.selected);
+        },
+        drawDate: function(month, year, selected) {
+            this.currentMonth = month;
+            this.currentYear = year;
+
+            if(selected) {
+                this.selected = selected;
+            }
+
+            this.drawCurrent();
+        },
+        drawPreviousMonth: function() {
+            if (this.currentMonth === 1) {
+                this.currentMonth = 12;
+                this.currentYear--;
+            }
+            else {
+                this.currentMonth--;
+            }
+            this.drawCurrent();
+        },
+        drawNextMonth: function() {
+            if (this.currentMonth === 12) {
+                this.currentMonth = 1;
+                this.currentYear++;
+            }
+            else {
+                this.currentMonth++;
+            }
+            this.drawCurrent();
+        },
+        drawPreviousYear: function() {
+            this.currentYear--;
+            this.drawCurrent();
+        },
+        drawNextYear: function() {
+            this.currentYear++;
+            this.drawCurrent();
+        }
+    };
+    window.Calendar = Calendar;
+})();
diff --git a/interface/static/admin/js/collapse.js b/interface/static/admin/js/collapse.js
new file mode 100644
index 0000000..7cb9362
--- /dev/null
+++ b/interface/static/admin/js/collapse.js
@@ -0,0 +1,26 @@
+/*global gettext*/
+(function($) {
+    'use strict';
+    $(document).ready(function() {
+        // Add anchor tag for Show/Hide link
+        $("fieldset.collapse").each(function(i, elem) {
+            // Don't hide if fields in this fieldset have errors
+            if ($(elem).find("div.errors").length === 0) {
+                $(elem).addClass("collapsed").find("h2").first().append(' (<a id="fieldsetcollapser' +
+                    i + '" class="collapse-toggle" href="#">' + gettext("Show") +
+                    '</a>)');
+            }
+        });
+        // Add toggle to anchor tag
+        $("fieldset.collapse a.collapse-toggle").click(function(ev) {
+            if ($(this).closest("fieldset").hasClass("collapsed")) {
+                // Show
+                $(this).text(gettext("Hide")).closest("fieldset").removeClass("collapsed").trigger("show.fieldset", [$(this).attr("id")]);
+            } else {
+                // Hide
+                $(this).text(gettext("Show")).closest("fieldset").addClass("collapsed").trigger("hide.fieldset", [$(this).attr("id")]);
+            }
+            return false;
+        });
+    });
+})(django.jQuery);
diff --git a/interface/static/admin/js/collapse.min.js b/interface/static/admin/js/collapse.min.js
new file mode 100644
index 0000000..6251d91
--- /dev/null
+++ b/interface/static/admin/js/collapse.min.js
@@ -0,0 +1,2 @@
+(function(a){a(document).ready(function(){a("fieldset.collapse").each(function(b,c){0===a(c).find("div.errors").length&&a(c).addClass("collapsed").find("h2").first().append(' (<a id="fieldsetcollapser'+b+'" class="collapse-toggle" href="#">'+gettext("Show")+"</a>)")});a("fieldset.collapse a.collapse-toggle").click(function(b){a(this).closest("fieldset").hasClass("collapsed")?a(this).text(gettext("Hide")).closest("fieldset").removeClass("collapsed").trigger("show.fieldset",[a(this).attr("id")]):a(this).text(gettext("Show")).closest("fieldset").addClass("collapsed").trigger("hide.fieldset",
+[a(this).attr("id")]);return!1})})})(django.jQuery);
diff --git a/interface/static/admin/js/core.js b/interface/static/admin/js/core.js
new file mode 100644
index 0000000..1840948
--- /dev/null
+++ b/interface/static/admin/js/core.js
@@ -0,0 +1,266 @@
+// Core javascript helper functions
+
+// basic browser identification & version
+var isOpera = (navigator.userAgent.indexOf("Opera") >= 0) && parseFloat(navigator.appVersion);
+var isIE = ((document.all) && (!isOpera)) && parseFloat(navigator.appVersion.split("MSIE ")[1].split(";")[0]);
+
+// Cross-browser event handlers.
+function addEvent(obj, evType, fn) {
+    'use strict';
+    if (obj.addEventListener) {
+        obj.addEventListener(evType, fn, false);
+        return true;
+    } else if (obj.attachEvent) {
+        var r = obj.attachEvent("on" + evType, fn);
+        return r;
+    } else {
+        return false;
+    }
+}
+
+function removeEvent(obj, evType, fn) {
+    'use strict';
+    if (obj.removeEventListener) {
+        obj.removeEventListener(evType, fn, false);
+        return true;
+    } else if (obj.detachEvent) {
+        obj.detachEvent("on" + evType, fn);
+        return true;
+    } else {
+        return false;
+    }
+}
+
+function cancelEventPropagation(e) {
+    'use strict';
+    if (!e) {
+        e = window.event;
+    }
+    e.cancelBubble = true;
+    if (e.stopPropagation) {
+        e.stopPropagation();
+    }
+}
+
+// quickElement(tagType, parentReference [, textInChildNode, attribute, attributeValue ...]);
+function quickElement() {
+    'use strict';
+    var obj = document.createElement(arguments[0]);
+    if (arguments[2]) {
+        var textNode = document.createTextNode(arguments[2]);
+        obj.appendChild(textNode);
+    }
+    var len = arguments.length;
+    for (var i = 3; i < len; i += 2) {
+        obj.setAttribute(arguments[i], arguments[i + 1]);
+    }
+    arguments[1].appendChild(obj);
+    return obj;
+}
+
+// "a" is reference to an object
+function removeChildren(a) {
+    'use strict';
+    while (a.hasChildNodes()) {
+        a.removeChild(a.lastChild);
+    }
+}
+
+// ----------------------------------------------------------------------------
+// Cross-browser xmlhttp object
+// from http://jibbering.com/2002/4/httprequest.html
+// ----------------------------------------------------------------------------
+var xmlhttp;
+/*@cc_on @*/
+/*@if (@_jscript_version >= 5)
+    try {
+        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
+    } catch (e) {
+        try {
+            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
+        } catch (E) {
+            xmlhttp = false;
+        }
+    }
+@else
+    xmlhttp = false;
+@end @*/
+if (!xmlhttp && typeof XMLHttpRequest !== 'undefined') {
+    xmlhttp = new XMLHttpRequest();
+}
+
+// ----------------------------------------------------------------------------
+// Find-position functions by PPK
+// See http://www.quirksmode.org/js/findpos.html
+// ----------------------------------------------------------------------------
+function findPosX(obj) {
+    'use strict';
+    var curleft = 0;
+    if (obj.offsetParent) {
+        while (obj.offsetParent) {
+            curleft += obj.offsetLeft - ((isOpera) ? 0 : obj.scrollLeft);
+            obj = obj.offsetParent;
+        }
+        // IE offsetParent does not include the top-level
+        if (isIE && obj.parentElement) {
+            curleft += obj.offsetLeft - obj.scrollLeft;
+        }
+    } else if (obj.x) {
+        curleft += obj.x;
+    }
+    return curleft;
+}
+
+function findPosY(obj) {
+    'use strict';
+    var curtop = 0;
+    if (obj.offsetParent) {
+        while (obj.offsetParent) {
+            curtop += obj.offsetTop - ((isOpera) ? 0 : obj.scrollTop);
+            obj = obj.offsetParent;
+        }
+        // IE offsetParent does not include the top-level
+        if (isIE && obj.parentElement) {
+            curtop += obj.offsetTop - obj.scrollTop;
+        }
+    } else if (obj.y) {
+        curtop += obj.y;
+    }
+    return curtop;
+}
+
+//-----------------------------------------------------------------------------
+// Date object extensions
+// ----------------------------------------------------------------------------
+(function() {
+    'use strict';
+    Date.prototype.getTwelveHours = function() {
+        var hours = this.getHours();
+        if (hours === 0) {
+            return 12;
+        }
+        else {
+            return hours <= 12 ? hours : hours - 12;
+        }
+    };
+
+    Date.prototype.getTwoDigitMonth = function() {
+        return (this.getMonth() < 9) ? '0' + (this.getMonth() + 1) : (this.getMonth() + 1);
+    };
+
+    Date.prototype.getTwoDigitDate = function() {
+        return (this.getDate() < 10) ? '0' + this.getDate() : this.getDate();
+    };
+
+    Date.prototype.getTwoDigitTwelveHour = function() {
+        return (this.getTwelveHours() < 10) ? '0' + this.getTwelveHours() : this.getTwelveHours();
+    };
+
+    Date.prototype.getTwoDigitHour = function() {
+        return (this.getHours() < 10) ? '0' + this.getHours() : this.getHours();
+    };
+
+    Date.prototype.getTwoDigitMinute = function() {
+        return (this.getMinutes() < 10) ? '0' + this.getMinutes() : this.getMinutes();
+    };
+
+    Date.prototype.getTwoDigitSecond = function() {
+        return (this.getSeconds() < 10) ? '0' + this.getSeconds() : this.getSeconds();
+    };
+
+    Date.prototype.getHourMinute = function() {
+        return this.getTwoDigitHour() + ':' + this.getTwoDigitMinute();
+    };
+
+    Date.prototype.getHourMinuteSecond = function() {
+        return this.getTwoDigitHour() + ':' + this.getTwoDigitMinute() + ':' + this.getTwoDigitSecond();
+    };
+
+    Date.prototype.strftime = function(format) {
+        var fields = {
+            c: this.toString(),
+            d: this.getTwoDigitDate(),
+            H: this.getTwoDigitHour(),
+            I: this.getTwoDigitTwelveHour(),
+            m: this.getTwoDigitMonth(),
+            M: this.getTwoDigitMinute(),
+            p: (this.getHours() >= 12) ? 'PM' : 'AM',
+            S: this.getTwoDigitSecond(),
+            w: '0' + this.getDay(),
+            x: this.toLocaleDateString(),
+            X: this.toLocaleTimeString(),
+            y: ('' + this.getFullYear()).substr(2, 4),
+            Y: '' + this.getFullYear(),
+            '%': '%'
+        };
+        var result = '', i = 0;
+        while (i < format.length) {
+            if (format.charAt(i) === '%') {
+                result = result + fields[format.charAt(i + 1)];
+                ++i;
+            }
+            else {
+                result = result + format.charAt(i);
+            }
+            ++i;
+        }
+        return result;
+    };
+
+// ----------------------------------------------------------------------------
+// String object extensions
+// ----------------------------------------------------------------------------
+    String.prototype.pad_left = function(pad_length, pad_string) {
+        var new_string = this;
+        for (var i = 0; new_string.length < pad_length; i++) {
+            new_string = pad_string + new_string;
+        }
+        return new_string;
+    };
+
+    String.prototype.strptime = function(format) {
+        var split_format = format.split(/[.\-/]/);
+        var date = this.split(/[.\-/]/);
+        var i = 0;
+        var day, month, year;
+        while (i < split_format.length) {
+            switch (split_format[i]) {
+                case "%d":
+                    day = date[i];
+                    break;
+                case "%m":
+                    month = date[i] - 1;
+                    break;
+                case "%Y":
+                    year = date[i];
+                    break;
+                case "%y":
+                    year = date[i];
+                    break;
+            }
+            ++i;
+        }
+        // Create Date object from UTC since the parsed value is supposed to be
+        // in UTC, not local time. Also, the calendar uses UTC functions for
+        // date extraction.
+        return new Date(Date.UTC(year, month, day));
+    };
+
+})();
+// ----------------------------------------------------------------------------
+// Get the computed style for and element
+// ----------------------------------------------------------------------------
+function getStyle(oElm, strCssRule) {
+    'use strict';
+    var strValue = "";
+    if(document.defaultView && document.defaultView.getComputedStyle) {
+        strValue = document.defaultView.getComputedStyle(oElm, "").getPropertyValue(strCssRule);
+    }
+    else if(oElm.currentStyle) {
+        strCssRule = strCssRule.replace(/\-(\w)/g, function(strMatch, p1) {
+            return p1.toUpperCase();
+        });
+        strValue = oElm.currentStyle[strCssRule];
+    }
+    return strValue;
+}
diff --git a/interface/static/admin/js/inlines.js b/interface/static/admin/js/inlines.js
new file mode 100644
index 0000000..c725e30
--- /dev/null
+++ b/interface/static/admin/js/inlines.js
@@ -0,0 +1,275 @@
+/*global DateTimeShortcuts, SelectFilter*/
+/**
+ * Django admin inlines
+ *
+ * Based on jQuery Formset 1.1
+ * @author Stanislaus Madueke (stan DOT madueke AT gmail DOT com)
+ * @requires jQuery 1.2.6 or later
+ *
+ * Copyright (c) 2009, Stanislaus Madueke
+ * All rights reserved.
+ *
+ * Spiced up with Code from Zain Memon's GSoC project 2009
+ * and modified for Django by Jannis Leidel, Travis Swicegood and Julien Phalip.
+ *
+ * Licensed under the New BSD License
+ * See: http://www.opensource.org/licenses/bsd-license.php
+ */
+(function($) {
+    'use strict';
+    $.fn.formset = function(opts) {
+        var options = $.extend({}, $.fn.formset.defaults, opts);
+        var $this = $(this);
+        var $parent = $this.parent();
+        var updateElementIndex = function(el, prefix, ndx) {
+            var id_regex = new RegExp("(" + prefix + "-(\\d+|__prefix__))");
+            var replacement = prefix + "-" + ndx;
+            if ($(el).prop("for")) {
+                $(el).prop("for", $(el).prop("for").replace(id_regex, replacement));
+            }
+            if (el.id) {
+                el.id = el.id.replace(id_regex, replacement);
+            }
+            if (el.name) {
+                el.name = el.name.replace(id_regex, replacement);
+            }
+        };
+        var totalForms = $("#id_" + options.prefix + "-TOTAL_FORMS").prop("autocomplete", "off");
+        var nextIndex = parseInt(totalForms.val(), 10);
+        var maxForms = $("#id_" + options.prefix + "-MAX_NUM_FORMS").prop("autocomplete", "off");
+        // only show the add button if we are allowed to add more items,
+        // note that max_num = None translates to a blank string.
+        var showAddButton = maxForms.val() === '' || (maxForms.val() - totalForms.val()) > 0;
+        $this.each(function(i) {
+            $(this).not("." + options.emptyCssClass).addClass(options.formCssClass);
+        });
+        if ($this.length && showAddButton) {
+            var addButton;
+            if ($this.prop("tagName") === "TR") {
+                // If forms are laid out as table rows, insert the
+                // "add" button in a new table row:
+                var numCols = this.eq(-1).children().length;
+                $parent.append('<tr class="' + options.addCssClass + '"><td colspan="' + numCols + '"><a href="javascript:void(0)">' + options.addText + "</a></tr>");
+                addButton = $parent.find("tr:last a");
+            } else {
+                // Otherwise, insert it immediately after the last form:
+                $this.filter(":last").after('<div class="' + options.addCssClass + '"><a href="javascript:void(0)">' + options.addText + "</a></div>");
+                addButton = $this.filter(":last").next().find("a");
+            }
+            addButton.click(function(e) {
+                e.preventDefault();
+                var template = $("#" + options.prefix + "-empty");
+                var row = template.clone(true);
+                row.removeClass(options.emptyCssClass)
+                .addClass(options.formCssClass)
+                .attr("id", options.prefix + "-" + nextIndex);
+                if (row.is("tr")) {
+                    // If the forms are laid out in table rows, insert
+                    // the remove button into the last table cell:
+                    row.children(":last").append('<div><a class="' + options.deleteCssClass + '" href="javascript:void(0)">' + options.deleteText + "</a></div>");
+                } else if (row.is("ul") || row.is("ol")) {
+                    // If they're laid out as an ordered/unordered list,
+                    // insert an <li> after the last list item:
+                    row.append('<li><a class="' + options.deleteCssClass + '" href="javascript:void(0)">' + options.deleteText + "</a></li>");
+                } else {
+                    // Otherwise, just insert the remove button as the
+                    // last child element of the form's container:
+                    row.children(":first").append('<span><a class="' + options.deleteCssClass + '" href="javascript:void(0)">' + options.deleteText + "</a></span>");
+                }
+                row.find("*").each(function() {
+                    updateElementIndex(this, options.prefix, totalForms.val());
+                });
+                // Insert the new form when it has been fully edited
+                row.insertBefore($(template));
+                // Update number of total forms
+                $(totalForms).val(parseInt(totalForms.val(), 10) + 1);
+                nextIndex += 1;
+                // Hide add button in case we've hit the max, except we want to add infinitely
+                if ((maxForms.val() !== '') && (maxForms.val() - totalForms.val()) <= 0) {
+                    addButton.parent().hide();
+                }
+                // The delete button of each row triggers a bunch of other things
+                row.find("a." + options.deleteCssClass).click(function(e1) {
+                    e1.preventDefault();
+                    // Remove the parent form containing this button:
+                    row.remove();
+                    nextIndex -= 1;
+                    // If a post-delete callback was provided, call it with the deleted form:
+                    if (options.removed) {
+                        options.removed(row);
+                    }
+                    $(document).trigger('formset:removed', [row, options.prefix]);
+                    // Update the TOTAL_FORMS form count.
+                    var forms = $("." + options.formCssClass);
+                    $("#id_" + options.prefix + "-TOTAL_FORMS").val(forms.length);
+                    // Show add button again once we drop below max
+                    if ((maxForms.val() === '') || (maxForms.val() - forms.length) > 0) {
+                        addButton.parent().show();
+                    }
+                    // Also, update names and ids for all remaining form controls
+                    // so they remain in sequence:
+                    var i, formCount;
+                    var updateElementCallback = function() {
+                        updateElementIndex(this, options.prefix, i);
+                    };
+                    for (i = 0, formCount = forms.length; i < formCount; i++) {
+                        updateElementIndex($(forms).get(i), options.prefix, i);
+                        $(forms.get(i)).find("*").each(updateElementCallback);
+                    }
+                });
+                // If a post-add callback was supplied, call it with the added form:
+                if (options.added) {
+                    options.added(row);
+                }
+                $(document).trigger('formset:added', [row, options.prefix]);
+            });
+        }
+        return this;
+    };
+
+    /* Setup plugin defaults */
+    $.fn.formset.defaults = {
+        prefix: "form",          // The form prefix for your django formset
+        addText: "add another",      // Text for the add link
+        deleteText: "remove",      // Text for the delete link
+        addCssClass: "add-row",      // CSS class applied to the add link
+        deleteCssClass: "delete-row",  // CSS class applied to the delete link
+        emptyCssClass: "empty-row",    // CSS class applied to the empty row
+        formCssClass: "dynamic-form",  // CSS class applied to each form in a formset
+        added: null,          // Function called each time a new form is added
+        removed: null          // Function called each time a form is deleted
+    };
+
+
+    // Tabular inlines ---------------------------------------------------------
+    $.fn.tabularFormset = function(options) {
+        var $rows = $(this);
+        var alternatingRows = function(row) {
+            $($rows.selector).not(".add-row").removeClass("row1 row2")
+            .filter(":even").addClass("row1").end()
+            .filter(":odd").addClass("row2");
+        };
+
+        var reinitDateTimeShortCuts = function() {
+            // Reinitialize the calendar and clock widgets by force
+            if (typeof DateTimeShortcuts !== "undefined") {
+                $(".datetimeshortcuts").remove();
+                DateTimeShortcuts.init();
+            }
+        };
+
+        var updateSelectFilter = function() {
+            // If any SelectFilter widgets are a part of the new form,
+            // instantiate a new SelectFilter instance for it.
+            if (typeof SelectFilter !== 'undefined') {
+                $('.selectfilter').each(function(index, value) {
+                    var namearr = value.name.split('-');
+                    SelectFilter.init(value.id, namearr[namearr.length - 1], false);
+                });
+                $('.selectfilterstacked').each(function(index, value) {
+                    var namearr = value.name.split('-');
+                    SelectFilter.init(value.id, namearr[namearr.length - 1], true);
+                });
+            }
+        };
+
+        var initPrepopulatedFields = function(row) {
+            row.find('.prepopulated_field').each(function() {
+                var field = $(this),
+                    input = field.find('input, select, textarea'),
+                    dependency_list = input.data('dependency_list') || [],
+                    dependencies = [];
+                $.each(dependency_list, function(i, field_name) {
+                    dependencies.push('#' + row.find('.field-' + field_name).find('input, select, textarea').attr('id'));
+                });
+                if (dependencies.length) {
+                    input.prepopulate(dependencies, input.attr('maxlength'));
+                }
+            });
+        };
+
+        $rows.formset({
+            prefix: options.prefix,
+            addText: options.addText,
+            formCssClass: "dynamic-" + options.prefix,
+            deleteCssClass: "inline-deletelink",
+            deleteText: options.deleteText,
+            emptyCssClass: "empty-form",
+            removed: alternatingRows,
+            added: function(row) {
+                initPrepopulatedFields(row);
+                reinitDateTimeShortCuts();
+                updateSelectFilter();
+                alternatingRows(row);
+            }
+        });
+
+        return $rows;
+    };
+
+    // Stacked inlines ---------------------------------------------------------
+    $.fn.stackedFormset = function(options) {
+        var $rows = $(this);
+        var updateInlineLabel = function(row) {
+            $($rows.selector).find(".inline_label").each(function(i) {
+                var count = i + 1;
+                $(this).html($(this).html().replace(/(#\d+)/g, "#" + count));
+            });
+        };
+
+        var reinitDateTimeShortCuts = function() {
+            // Reinitialize the calendar and clock widgets by force, yuck.
+            if (typeof DateTimeShortcuts !== "undefined") {
+                $(".datetimeshortcuts").remove();
+                DateTimeShortcuts.init();
+            }
+        };
+
+        var updateSelectFilter = function() {
+            // If any SelectFilter widgets were added, instantiate a new instance.
+            if (typeof SelectFilter !== "undefined") {
+                $(".selectfilter").each(function(index, value) {
+                    var namearr = value.name.split('-');
+                    SelectFilter.init(value.id, namearr[namearr.length - 1], false);
+                });
+                $(".selectfilterstacked").each(function(index, value) {
+                    var namearr = value.name.split('-');
+                    SelectFilter.init(value.id, namearr[namearr.length - 1], true);
+                });
+            }
+        };
+
+        var initPrepopulatedFields = function(row) {
+            row.find('.prepopulated_field').each(function() {
+                var field = $(this),
+                    input = field.find('input, select, textarea'),
+                    dependency_list = input.data('dependency_list') || [],
+                    dependencies = [];
+                $.each(dependency_list, function(i, field_name) {
+                    dependencies.push('#' + row.find('.form-row .field-' + field_name).find('input, select, textarea').attr('id'));
+                });
+                if (dependencies.length) {
+                    input.prepopulate(dependencies, input.attr('maxlength'));
+                }
+            });
+        };
+
+        $rows.formset({
+            prefix: options.prefix,
+            addText: options.addText,
+            formCssClass: "dynamic-" + options.prefix,
+            deleteCssClass: "inline-deletelink",
+            deleteText: options.deleteText,
+            emptyCssClass: "empty-form",
+            removed: updateInlineLabel,
+            added: function(row) {
+                initPrepopulatedFields(row);
+                reinitDateTimeShortCuts();
+                updateSelectFilter();
+                updateInlineLabel(row);
+            }
+        });
+
+        return $rows;
+    };
+})(django.jQuery);
diff --git a/interface/static/admin/js/inlines.min.js b/interface/static/admin/js/inlines.min.js
new file mode 100644
index 0000000..f83cbec
--- /dev/null
+++ b/interface/static/admin/js/inlines.min.js
@@ -0,0 +1,9 @@
+(function(b){b.fn.formset=function(d){var a=b.extend({},b.fn.formset.defaults,d),e=b(this);d=e.parent();var k=function(a,f,l){var c=new RegExp("("+f+"-(\\d+|__prefix__))");f=f+"-"+l;b(a).prop("for")&&b(a).prop("for",b(a).prop("for").replace(c,f));a.id&&(a.id=a.id.replace(c,f));a.name&&(a.name=a.name.replace(c,f))},h=b("#id_"+a.prefix+"-TOTAL_FORMS").prop("autocomplete","off"),l=parseInt(h.val(),10),f=b("#id_"+a.prefix+"-MAX_NUM_FORMS").prop("autocomplete","off"),c=""===f.val()||0<f.val()-h.val();
+e.each(function(f){b(this).not("."+a.emptyCssClass).addClass(a.formCssClass)});if(e.length&&c){var m;"TR"===e.prop("tagName")?(e=this.eq(-1).children().length,d.append('<tr class="'+a.addCssClass+'"><td colspan="'+e+'"><a href="javascript:void(0)">'+a.addText+"</a></tr>"),m=d.find("tr:last a")):(e.filter(":last").after('<div class="'+a.addCssClass+'"><a href="javascript:void(0)">'+a.addText+"</a></div>"),m=e.filter(":last").next().find("a"));m.click(function(c){c.preventDefault();c=b("#"+a.prefix+
+"-empty");var g=c.clone(!0);g.removeClass(a.emptyCssClass).addClass(a.formCssClass).attr("id",a.prefix+"-"+l);g.is("tr")?g.children(":last").append('<div><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></div>"):g.is("ul")||g.is("ol")?g.append('<li><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></li>"):g.children(":first").append('<span><a class="'+a.deleteCssClass+'" href="javascript:void(0)">'+a.deleteText+"</a></span>");g.find("*").each(function(){k(this,
+a.prefix,h.val())});g.insertBefore(b(c));b(h).val(parseInt(h.val(),10)+1);l+=1;""!==f.val()&&0>=f.val()-h.val()&&m.parent().hide();g.find("a."+a.deleteCssClass).click(function(c){c.preventDefault();g.remove();--l;a.removed&&a.removed(g);b(document).trigger("formset:removed",[g,a.prefix]);c=b("."+a.formCssClass);b("#id_"+a.prefix+"-TOTAL_FORMS").val(c.length);(""===f.val()||0<f.val()-c.length)&&m.parent().show();var d,e,h=function(){k(this,a.prefix,d)};d=0;for(e=c.length;d<e;d++)k(b(c).get(d),a.prefix,
+d),b(c.get(d)).find("*").each(h)});a.added&&a.added(g);b(document).trigger("formset:added",[g,a.prefix])})}return this};b.fn.formset.defaults={prefix:"form",addText:"add another",deleteText:"remove",addCssClass:"add-row",deleteCssClass:"delete-row",emptyCssClass:"empty-row",formCssClass:"dynamic-form",added:null,removed:null};b.fn.tabularFormset=function(d){var a=b(this),e=function(l){b(a.selector).not(".add-row").removeClass("row1 row2").filter(":even").addClass("row1").end().filter(":odd").addClass("row2")},
+k=function(){"undefined"!==typeof SelectFilter&&(b(".selectfilter").each(function(a,b){var c=b.name.split("-");SelectFilter.init(b.id,c[c.length-1],!1)}),b(".selectfilterstacked").each(function(a,b){var c=b.name.split("-");SelectFilter.init(b.id,c[c.length-1],!0)}))},h=function(a){a.find(".prepopulated_field").each(function(){var f=b(this).find("input, select, textarea"),c=f.data("dependency_list")||[],d=[];b.each(c,function(b,c){d.push("#"+a.find(".field-"+c).find("input, select, textarea").attr("id"))});
+d.length&&f.prepopulate(d,f.attr("maxlength"))})};a.formset({prefix:d.prefix,addText:d.addText,formCssClass:"dynamic-"+d.prefix,deleteCssClass:"inline-deletelink",deleteText:d.deleteText,emptyCssClass:"empty-form",removed:e,added:function(a){h(a);"undefined"!==typeof DateTimeShortcuts&&(b(".datetimeshortcuts").remove(),DateTimeShortcuts.init());k();e(a)}});return a};b.fn.stackedFormset=function(d){var a=b(this),e=function(d){b(a.selector).find(".inline_label").each(function(a){a+=1;b(this).html(b(this).html().replace(/(#\d+)/g,
+"#"+a))})},k=function(){"undefined"!==typeof SelectFilter&&(b(".selectfilter").each(function(a,b){var c=b.name.split("-");SelectFilter.init(b.id,c[c.length-1],!1)}),b(".selectfilterstacked").each(function(a,b){var c=b.name.split("-");SelectFilter.init(b.id,c[c.length-1],!0)}))},h=function(a){a.find(".prepopulated_field").each(function(){var d=b(this).find("input, select, textarea"),c=d.data("dependency_list")||[],e=[];b.each(c,function(b,c){e.push("#"+a.find(".form-row .field-"+c).find("input, select, textarea").attr("id"))});
+e.length&&d.prepopulate(e,d.attr("maxlength"))})};a.formset({prefix:d.prefix,addText:d.addText,formCssClass:"dynamic-"+d.prefix,deleteCssClass:"inline-deletelink",deleteText:d.deleteText,emptyCssClass:"empty-form",removed:e,added:function(a){h(a);"undefined"!==typeof DateTimeShortcuts&&(b(".datetimeshortcuts").remove(),DateTimeShortcuts.init());k();e(a)}});return a}})(django.jQuery);
diff --git a/interface/static/admin/js/jquery.init.js b/interface/static/admin/js/jquery.init.js
new file mode 100644
index 0000000..f3ac162
--- /dev/null
+++ b/interface/static/admin/js/jquery.init.js
@@ -0,0 +1,8 @@
+/*global django:true, jQuery:false*/
+/* Puts the included jQuery into our own namespace using noConflict and passing
+ * it 'true'. This ensures that the included jQuery doesn't pollute the global
+ * namespace (i.e. this preserves pre-existing values for both window.$ and
+ * window.jQuery).
+ */
+var django = django || {};
+django.jQuery = jQuery.noConflict(true);
diff --git a/interface/static/admin/js/prepopulate.js b/interface/static/admin/js/prepopulate.js
new file mode 100644
index 0000000..5d4b0e8
--- /dev/null
+++ b/interface/static/admin/js/prepopulate.js
@@ -0,0 +1,42 @@
+/*global URLify*/
+(function($) {
+    'use strict';
+    $.fn.prepopulate = function(dependencies, maxLength, allowUnicode) {
+        /*
+            Depends on urlify.js
+            Populates a selected field with the values of the dependent fields,
+            URLifies and shortens the string.
+            dependencies - array of dependent fields ids
+            maxLength - maximum length of the URLify'd string
+            allowUnicode - Unicode support of the URLify'd string
+        */
+        return this.each(function() {
+            var prepopulatedField = $(this);
+
+            var populate = function() {
+                // Bail if the field's value has been changed by the user
+                if (prepopulatedField.data('_changed')) {
+                    return;
+                }
+
+                var values = [];
+                $.each(dependencies, function(i, field) {
+                    field = $(field);
+                    if (field.val().length > 0) {
+                        values.push(field.val());
+                    }
+                });
+                prepopulatedField.val(URLify(values.join(' '), maxLength, allowUnicode));
+            };
+
+            prepopulatedField.data('_changed', false);
+            prepopulatedField.change(function() {
+                prepopulatedField.data('_changed', true);
+            });
+
+            if (!prepopulatedField.val()) {
+                $(dependencies.join(',')).keyup(populate).change(populate).focus(populate);
+            }
+        });
+    };
+})(django.jQuery);
diff --git a/interface/static/admin/js/prepopulate.min.js b/interface/static/admin/js/prepopulate.min.js
new file mode 100644
index 0000000..75f3c17
--- /dev/null
+++ b/interface/static/admin/js/prepopulate.min.js
@@ -0,0 +1 @@
+(function(c){c.fn.prepopulate=function(e,f,g){return this.each(function(){var a=c(this),b=function(){if(!a.data("_changed")){var b=[];c.each(e,function(a,d){d=c(d);0<d.val().length&&b.push(d.val())});a.val(URLify(b.join(" "),f,g))}};a.data("_changed",!1);a.change(function(){a.data("_changed",!0)});a.val()||c(e.join(",")).keyup(b).change(b).focus(b)})}})(django.jQuery);
diff --git a/interface/static/admin/js/timeparse.js b/interface/static/admin/js/timeparse.js
new file mode 100644
index 0000000..3cdc7ec
--- /dev/null
+++ b/interface/static/admin/js/timeparse.js
@@ -0,0 +1,106 @@
+(function() {
+    'use strict';
+    var timeParsePatterns = [
+        // 9
+        {
+            re: /^\d{1,2}$/i,
+            handler: function(bits) {
+                if (bits[0].length === 1) {
+                    return '0' + bits[0] + ':00';
+                } else {
+                    return bits[0] + ':00';
+                }
+            }
+        },
+        // 13:00
+        {
+            re: /^\d{2}[:.]\d{2}$/i,
+            handler: function(bits) {
+                return bits[0].replace('.', ':');
+            }
+        },
+        // 9:00
+        {
+            re: /^\d[:.]\d{2}$/i,
+            handler: function(bits) {
+                return '0' + bits[0].replace('.', ':');
+            }
+        },
+        // 3 am / 3 a.m. / 3am
+        {
+            re: /^(\d+)\s*([ap])(?:.?m.?)?$/i,
+            handler: function(bits) {
+                var hour = parseInt(bits[1]);
+                if (hour === 12) {
+                    hour = 0;
+                }
+                if (bits[2].toLowerCase() === 'p') {
+                    if (hour === 12) {
+                        hour = 0;
+                    }
+                    return (hour + 12) + ':00';
+                } else {
+                    if (hour < 10) {
+                        return '0' + hour + ':00';
+                    } else {
+                        return hour + ':00';
+                    }
+                }
+            }
+        },
+        // 3.30 am / 3:15 a.m. / 3.00am
+        {
+            re: /^(\d+)[.:](\d{2})\s*([ap]).?m.?$/i,
+            handler: function(bits) {
+                var hour = parseInt(bits[1]);
+                var mins = parseInt(bits[2]);
+                if (mins < 10) {
+                    mins = '0' + mins;
+                }
+                if (hour === 12) {
+                    hour = 0;
+                }
+                if (bits[3].toLowerCase() === 'p') {
+                    if (hour === 12) {
+                        hour = 0;
+                    }
+                    return (hour + 12) + ':' + mins;
+                } else {
+                    if (hour < 10) {
+                        return '0' + hour + ':' + mins;
+                    } else {
+                        return hour + ':' + mins;
+                    }
+                }
+            }
+        },
+        // noon
+        {
+            re: /^no/i,
+            handler: function(bits) {
+                return '12:00';
+            }
+        },
+        // midnight
+        {
+            re: /^mid/i,
+            handler: function(bits) {
+                return '00:00';
+            }
+        }
+    ];
+
+    function parseTimeString(s) {
+        for (var i = 0; i < timeParsePatterns.length; i++) {
+            var re = timeParsePatterns[i].re;
+            var handler = timeParsePatterns[i].handler;
+            var bits = re.exec(s);
+            if (bits) {
+                return handler(bits);
+            }
+        }
+        return s;
+    }
+
+    window.parseTimeString = parseTimeString;
+})();
diff --git a/interface/static/admin/js/urlify.js b/interface/static/admin/js/urlify.js
new file mode 100644
index 0000000..b27325e
--- /dev/null
+++ b/interface/static/admin/js/urlify.js
@@ -0,0 +1,171 @@
+/*global XRegExp*/
+(function() {
+    'use strict';
+
+    var LATIN_MAP = {
+        'À': 'A', 'Á': 'A', 'Â': 'A', 'Ã': 'A', 'Ä': 'A', 'Å': 'A', 'Æ': 'AE',
+        'Ç': 'C', 'È': 'E', 'É': 'E', 'Ê': 'E', 'Ë': 'E', 'Ì': 'I', 'Í': 'I',
+        'Î': 'I', 'Ï': 'I', 'Ð': 'D', 'Ñ': 'N', 'Ò': 'O', 'Ó': 'O', 'Ô': 'O',
+        'Õ': 'O', 'Ö': 'O', 'Ő': 'O', 'Ø': 'O', 'Ù': 'U', 'Ú': 'U', 'Û': 'U',
+        'Ü': 'U', 'Ű': 'U', 'Ý': 'Y', 'Þ': 'TH', 'Ÿ': 'Y', 'ß': 'ss', 'à': 'a',
+        'á': 'a', 'â': 'a', 'ã': 'a', 'ä': 'a', 'å': 'a', 'æ': 'ae', 'ç': 'c',
+        'è': 'e', 'é': 'e', 'ê': 'e', 'ë': 'e', 'ì': 'i', 'í': 'i', 'î': 'i',
+        'ï': 'i', 'ð': 'd', 'ñ': 'n', 'ò': 'o', 'ó': 'o', 'ô': 'o', 'õ': 'o',
+        'ö': 'o', 'ő': 'o', 'ø': 'o', 'ù': 'u', 'ú': 'u', 'û': 'u', 'ü': 'u',
+        'ű': 'u', 'ý': 'y', 'þ': 'th', 'ÿ': 'y'
+    };
+    var LATIN_SYMBOLS_MAP = {
+        '©': '(c)'
+    };
+    var GREEK_MAP = {
+        'α': 'a', 'β': 'b', 'γ': 'g', 'δ': 'd', 'ε': 'e', 'ζ': 'z', 'η': 'h',
+        'θ': '8', 'ι': 'i', 'κ': 'k', 'λ': 'l', 'μ': 'm', 'ν': 'n', 'ξ': '3',
+        'ο': 'o', 'π': 'p', 'ρ': 'r', 'σ': 's', 'τ': 't', 'υ': 'y', 'φ': 'f',
+        'χ': 'x', 'ψ': 'ps', 'ω': 'w', 'ά': 'a', 'έ': 'e', 'ί': 'i', 'ό': 'o',
+        'ύ': 'y', 'ή': 'h', 'ώ': 'w', 'ς': 's', 'ϊ': 'i', 'ΰ': 'y', 'ϋ': 'y',
+        'ΐ': 'i', 'Α': 'A', 'Β': 'B', 'Γ': 'G', 'Δ': 'D', 'Ε': 'E', 'Ζ': 'Z',
+        'Η': 'H', 'Θ': '8', 'Ι': 'I', 'Κ': 'K', 'Λ': 'L', 'Μ': 'M', 'Ν': 'N',
+        'Ξ': '3', 'Ο': 'O', 'Π': 'P', 'Ρ': 'R', 'Σ': 'S', 'Τ': 'T', 'Υ': 'Y',
+        'Φ': 'F', 'Χ': 'X', 'Ψ': 'PS', 'Ω': 'W', 'Ά': 'A', 'Έ': 'E', 'Ί': 'I',
+        'Ό': 'O', 'Ύ': 'Y', 'Ή': 'H', 'Ώ': 'W', 'Ϊ': 'I', 'Ϋ': 'Y'
+    };
+    var TURKISH_MAP = {
+        'ş': 's', 'Ş': 'S', 'ı': 'i', 'İ': 'I', 'ç': 'c', 'Ç': 'C', 'ü': 'u',
+        'Ü': 'U', 'ö': 'o', 'Ö': 'O', 'ğ': 'g', 'Ğ': 'G'
+    };
+    var ROMANIAN_MAP = {
+        'ă': 'a', 'î': 'i', 'ș': 's', 'ț': 't', 'â': 'a',
+        'Ă': 'A', 'Î': 'I', 'Ș': 'S', 'Ț': 'T', 'Â': 'A'
+    };
+    var RUSSIAN_MAP = {
+        'а': 'a', 'б': 'b', 'в': 'v', 'г': 'g', 'д': 'd', 'е': 'e', 'ё': 'yo',
+        'ж': 'zh', 'з': 'z', 'и': 'i', 'й': 'j', 'к': 'k', 'л': 'l', 'м': 'm',
+        'н': 'n', 'о': 'o', 'п': 'p', 'р': 'r', 'с': 's', 'т': 't', 'у': 'u',
+        'ф': 'f', 'х': 'h', 'ц': 'c', 'ч': 'ch', 'ш': 'sh', 'щ': 'sh', 'ъ': '',
+        'ы': 'y', 'ь': '', 'э': 'e', 'ю': 'yu', 'я': 'ya',
+        'А': 'A', 'Б': 'B', 'В': 'V', 'Г': 'G', 'Д': 'D', 'Е': 'E', 'Ё': 'Yo',
+        'Ж': 'Zh', 'З': 'Z', 'И': 'I', 'Й': 'J', 'К': 'K', 'Л': 'L', 'М': 'M',
+        'Н': 'N', 'О': 'O', 'П': 'P', 'Р': 'R', 'С': 'S', 'Т': 'T', 'У': 'U',
+        'Ф': 'F', 'Х': 'H', 'Ц': 'C', 'Ч': 'Ch', 'Ш': 'Sh', 'Щ': 'Sh', 'Ъ': '',
+        'Ы': 'Y', 'Ь': '', 'Э': 'E', 'Ю': 'Yu', 'Я': 'Ya'
+    };
+    var UKRAINIAN_MAP = {
+        'Є': 'Ye', 'І': 'I', 'Ї': 'Yi', 'Ґ': 'G', 'є': 'ye', 'і': 'i',
+        'ї': 'yi', 'ґ': 'g'
+    };
+    var CZECH_MAP = {
+        'č': 'c', 'ď': 'd', 'ě': 'e', 'ň': 'n', 'ř': 'r', 'š': 's', 'ť': 't',
+        'ů': 'u', 'ž': 'z', 'Č': 'C', 'Ď': 'D', 'Ě': 'E', 'Ň': 'N', 'Ř': 'R',
+        'Š': 'S', 'Ť': 'T', 'Ů': 'U', 'Ž': 'Z'
+    };
+    var POLISH_MAP = {
+        'ą': 'a', 'ć': 'c', 'ę': 'e', 'ł': 'l', 'ń': 'n', 'ó': 'o', 'ś': 's',
+        'ź': 'z', 'ż': 'z',
+        'Ą': 'A', 'Ć': 'C', 'Ę': 'E', 'Ł': 'L', 'Ń': 'N', 'Ó': 'O', 'Ś': 'S',
+        'Ź': 'Z', 'Ż': 'Z'
+    };
+    var LATVIAN_MAP = {
+        'ā': 'a', 'č': 'c', 'ē': 'e', 'ģ': 'g', 'ī': 'i', 'ķ': 'k', 'ļ': 'l',
+        'ņ': 'n', 'š': 's', 'ū': 'u', 'ž': 'z',
+        'Ā': 'A', 'Č': 'C', 'Ē': 'E', 'Ģ': 'G', 'Ī': 'I', 'Ķ': 'K', 'Ļ': 'L',
+        'Ņ': 'N', 'Š': 'S', 'Ū': 'U', 'Ž': 'Z'
+    };
+    var ARABIC_MAP = {
+        'أ': 'a', 'ب': 'b', 'ت': 't', 'ث': 'th', 'ج': 'g', 'ح': 'h', 'خ': 'kh', 'د': 'd',
+        'ذ': 'th', 'ر': 'r', 'ز': 'z', 'س': 's', 'ش': 'sh', 'ص': 's', 'ض': 'd', 'ط': 't',
+        'ظ': 'th', 'ع': 'aa', 'غ': 'gh', 'ف': 'f', 'ق': 'k', 'ك': 'k', 'ل': 'l', 'م': 'm',
+        'ن': 'n', 'ه': 'h', 'و': 'o', 'ي': 'y'
+    };
+    var LITHUANIAN_MAP = {
+        'ą': 'a', 'č': 'c', 'ę': 'e', 'ė': 'e', 'į': 'i', 'š': 's', 'ų': 'u',
+        'ū': 'u', 'ž': 'z',
+        'Ą': 'A', 'Č': 'C', 'Ę': 'E', 'Ė': 'E', 'Į': 'I', 'Š': 'S', 'Ų': 'U',
+        'Ū': 'U', 'Ž': 'Z'
+    };
+    var SERBIAN_MAP = {
+        'ђ': 'dj', 'ј': 'j', 'љ': 'lj', 'њ': 'nj', 'ћ': 'c', 'џ': 'dz',
+        'đ': 'dj', 'Ђ': 'Dj', 'Ј': 'j', 'Љ': 'Lj', 'Њ': 'Nj', 'Ћ': 'C',
+        'Џ': 'Dz', 'Đ': 'Dj'
+    };
+    var AZERBAIJANI_MAP = {
+        'ç': 'c', 'ə': 'e', 'ğ': 'g', 'ı': 'i', 'ö': 'o', 'ş': 's', 'ü': 'u',
+        'Ç': 'C', 'Ə': 'E', 'Ğ': 'G', 'İ': 'I', 'Ö': 'O', 'Ş': 'S', 'Ü': 'U'
+    };
+
+    var ALL_DOWNCODE_MAPS = [
+        LATIN_MAP,
+        LATIN_SYMBOLS_MAP,
+        GREEK_MAP,
+        TURKISH_MAP,
+        ROMANIAN_MAP,
+        RUSSIAN_MAP,
+        UKRAINIAN_MAP,
+        CZECH_MAP,
+        POLISH_MAP,
+        LATVIAN_MAP,
+        ARABIC_MAP,
+        LITHUANIAN_MAP,
+        SERBIAN_MAP,
+        AZERBAIJANI_MAP
+    ];
+
+    var Downcoder = {
+        'Initialize': function() {
+            if (Downcoder.map) {  // already made
+                return;
+            }
+            Downcoder.map = {};
+            Downcoder.chars = [];
+            for (var i = 0; i < ALL_DOWNCODE_MAPS.length; i++) {
+                var lookup = ALL_DOWNCODE_MAPS[i];
+                for (var c in lookup) {
+                    if (lookup.hasOwnProperty(c)) {
+                        Downcoder.map[c] = lookup[c];
+                    }
+                }
+            }
+            for (var k in Downcoder.map) {
+                if (Downcoder.map.hasOwnProperty(k)) {
+                    Downcoder.chars.push(k);
+                }
+            }
+            Downcoder.regex = new RegExp(Downcoder.chars.join('|'), 'g');
+        }
+    };
+
+    function downcode(slug) {
+        Downcoder.Initialize();
+        return slug.replace(Downcoder.regex, function(m) {
+            return Downcoder.map[m];
+        });
+    }
+
+
+    function URLify(s, num_chars, allowUnicode) {
+        // changes, e.g., "Petty theft" to "petty-theft"
+        // remove all these words from the string before urlifying
+        if (!allowUnicode) {
+            s = downcode(s);
+        }
+        var removelist = [
+            "a", "an", "as", "at", "before", "but", "by", "for", "from", "is",
+            "in", "into", "like", "of", "off", "on", "onto", "per", "since",
+            "than", "the", "this", "that", "to", "up", "via", "with"
+        ];
+        var r = new RegExp('\\b(' + removelist.join('|') + ')\\b', 'gi');
+        s = s.replace(r, '');
+        // if downcode doesn't hit, the char will be stripped here
+        if (allowUnicode) {
+            // Keep Unicode letters including both lowercase and uppercase
+            // characters, whitespace, and dash; remove other characters.
+            s = XRegExp.replace(s, XRegExp('[^-_\\p{L}\\p{N}\\s]', 'g'), '');
+        } else {
+            s = s.replace(/[^-\w\s]/g, '');  // remove unneeded chars
+        }
+        s = s.replace(/^\s+|\s+$/g, '');   // trim leading/trailing spaces
+        s = s.replace(/[-\s]+/g, '-');     // convert spaces to hyphens
+        s = s.toLowerCase();               // convert to lowercase
+        return s.substring(0, num_chars);  // trim to first num_chars chars
+    }
+    window.URLify = URLify;
+})();
diff --git a/interface/static/admin/js/vendor/jquery/LICENSE-JQUERY.txt b/interface/static/admin/js/vendor/jquery/LICENSE-JQUERY.txt
new file mode 100644
index 0000000..d930e62
--- /dev/null
+++ b/interface/static/admin/js/vendor/jquery/LICENSE-JQUERY.txt
@@ -0,0 +1,26 @@
+Copyright jQuery Foundation and other contributors, https://jquery.org/
+
+This software consists of voluntary contributions made by many
+individuals. For exact contribution history, see the revision history
+available at https://github.com/jquery/jquery
+
+====
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/interface/static/admin/js/vendor/jquery/jquery.js b/interface/static/admin/js/vendor/jquery/jquery.js
new file mode 100644
index 0000000..eed1777
--- /dev/null
+++ b/interface/static/admin/js/vendor/jquery/jquery.js
@@ -0,0 +1,9210 @@
+/*!
+ * jQuery JavaScript Library v2.1.4
+ * http://jquery.com/
+ *
+ * Includes Sizzle.js
+ * http://sizzlejs.com/
+ *
+ * Copyright 2005, 2014 jQuery Foundation, Inc. and other contributors
+ * Released under the MIT license
+ * http://jquery.org/license
+ *
+ * Date: 2015-04-28T16:01Z
+ */
+
+(function( global, factory ) {
+
+	if ( typeof module === "object" && typeof module.exports === "object" ) {
+		// For CommonJS and CommonJS-like environments where a proper `window`
+		// is present, execute the factory and get jQuery.
+		// For environments that do not have a `window` with a `document`
+		// (such as Node.js), expose a factory as module.exports.
+		// This accentuates the need for the creation of a real `window`.
+		// e.g. var jQuery = require("jquery")(window);
+		// See ticket #14549 for more info.
+		module.exports = global.document ?
+			factory( global, true ) :
+			function( w ) {
+				if ( !w.document ) {
+					throw new Error( "jQuery requires a window with a document" );
+				}
+				return factory( w );
+			};
+	} else {
+		factory( global );
+	}
+
+// Pass this if window is not defined yet
+}(typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
+
+// Support: Firefox 18+
+// Can't be in strict mode, several libs including ASP.NET trace
+// the stack via arguments.caller.callee and Firefox dies if
+// you try to trace through "use strict" call chains. (#13335)
+//
+
+var arr = [];
+
+var slice = arr.slice;
+
+var concat = arr.concat;
+
+var push = arr.push;
+
+var indexOf = arr.indexOf;
+
+var class2type = {};
+
+var toString = class2type.toString;
+
+var hasOwn = class2type.hasOwnProperty;
+
+var support = {};
+
+
+
+var
+	// Use the correct document accordingly with window argument (sandbox)
+	document = window.document,
+
+	version = "2.1.4",
+
+	// Define a local copy of jQuery
+	jQuery = function( selector, context ) {
+		// The jQuery object is actually just the init constructor 'enhanced'
+		// Need init if jQuery is called (just allow error to be thrown if not included)
+		return new jQuery.fn.init( selector, context );
+	},
+
+	// Support: Android<4.1
+	// Make sure we trim BOM and NBSP
+	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,
+
+	// Matches dashed string for camelizing
+	rmsPrefix = /^-ms-/,
+	rdashAlpha = /-([\da-z])/gi,
+
+	// Used by jQuery.camelCase as callback to replace()
+	fcamelCase = function( all, letter ) {
+		return letter.toUpperCase();
+	};
+
+jQuery.fn = jQuery.prototype = {
+	// The current version of jQuery being used
+	jquery: version,
+
+	constructor: jQuery,
+
+	// Start with an empty selector
+	selector: "",
+
+	// The default length of a jQuery object is 0
+	length: 0,
+
+	toArray: function() {
+		return slice.call( this );
+	},
+
+	// Get the Nth element in the matched element set OR
+	// Get the whole matched element set as a clean array
+	get: function( num ) {
+		return num != null ?
+
+			// Return just the one element from the set
+			( num < 0 ? this[ num + this.length ] : this[ num ] ) :
+
+			// Return all the elements in a clean array
+			slice.call( this );
+	},
+
+	// Take an array of elements and push it onto the stack
+	// (returning the new matched element set)
+	pushStack: function( elems ) {
+
+		// Build a new jQuery matched element set
+		var ret = jQuery.merge( this.constructor(), elems );
+
+		// Add the old object onto the stack (as a reference)
+		ret.prevObject = this;
+		ret.context = this.context;
+
+		// Return the newly-formed element set
+		return ret;
+	},
+
+	// Execute a callback for every element in the matched set.
+	// (You can seed the arguments with an array of args, but this is
+	// only used internally.)
+	each: function( callback, args ) {
+		return jQuery.each( this, callback, args );
+	},
+
+	map: function( callback ) {
+		return this.pushStack( jQuery.map(this, function( elem, i ) {
+			return callback.call( elem, i, elem );
+		}));
+	},
+
+	slice: function() {
+		return this.pushStack( slice.apply( this, arguments ) );
+	},
+
+	first: function() {
+		return this.eq( 0 );
+	},
+
+	last: function() {
+		return this.eq( -1 );
+	},
+
+	eq: function( i ) {
+		var len = this.length,
+			j = +i + ( i < 0 ? len : 0 );
+		return this.pushStack( j >= 0 && j < len ? [ this[j] ] : [] );
+	},
+
+	end: function() {
+		return this.prevObject || this.constructor(null);
+	},
+
+	// For internal use only.
+	// Behaves like an Array's method, not like a jQuery method.
+	push: push,
+	sort: arr.sort,
+	splice: arr.splice
+};
+
+jQuery.extend = jQuery.fn.extend = function() {
+	var options, name, src, copy, copyIsArray, clone,
+		target = arguments[0] || {},
+		i = 1,
+		length = arguments.length,
+		deep = false;
+
+	// Handle a deep copy situation
+	if ( typeof target === "boolean" ) {
+		deep = target;
+
+		// Skip the boolean and the target
+		target = arguments[ i ] || {};
+		i++;
+	}
+
+	// Handle case when target is a string or something (possible in deep copy)
+	if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
+		target = {};
+	}
+
+	// Extend jQuery itself if only one argument is passed
+	if ( i === length ) {
+		target = this;
+		i--;
+	}
+
+	for ( ; i < length; i++ ) {
+		// Only deal with non-null/undefined values
+		if ( (options = arguments[ i ]) != null ) {
+			// Extend the base object
+			for ( name in options ) {
+				src = target[ name ];
+				copy = options[ name ];
+
+				// Prevent never-ending loop
+				if ( target === copy ) {
+					continue;
+				}
+
+				// Recurse if we're merging plain objects or arrays
+				if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
+					if ( copyIsArray ) {
+						copyIsArray = false;
+						clone = src && jQuery.isArray(src) ? src : [];
+
+					} else {
+						clone = src && jQuery.isPlainObject(src) ? src : {};
+					}
+
+					// Never move original objects, clone them
+					target[ name ] = jQuery.extend( deep, clone, copy );
+
+				// Don't bring in undefined values
+				} else if ( copy !== undefined ) {
+					target[ name ] = copy;
+				}
+			}
+		}
+	}
+
+	// Return the modified object
+	return target;
+};
+
+jQuery.extend({
+	// Unique for each copy of jQuery on the page
+	expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
+
+	// Assume jQuery is ready without the ready module
+	isReady: true,
+
+	error: function( msg ) {
+		throw new Error( msg );
+	},
+
+	noop: function() {},
+
+	isFunction: function( obj ) {
+		return jQuery.type(obj) === "function";
+	},
+
+	isArray: Array.isArray,
+
+	isWindow: function( obj ) {
+		return obj != null && obj === obj.window;
+	},
+
+	isNumeric: function( obj ) {
+		// parseFloat NaNs numeric-cast false positives (null|true|false|"")
+		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
+		// subtraction forces infinities to NaN
+		// adding 1 corrects loss of precision from parseFloat (#15100)
+		return !jQuery.isArray( obj ) && (obj - parseFloat( obj ) + 1) >= 0;
+	},
+
+	isPlainObject: function( obj ) {
+		// Not plain objects:
+		// - Any object or value whose internal [[Class]] property is not "[object Object]"
+		// - DOM nodes
+		// - window
+		if ( jQuery.type( obj ) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
+			return false;
+		}
+
+		if ( obj.constructor &&
+				!hasOwn.call( obj.constructor.prototype, "isPrototypeOf" ) ) {
+			return false;
+		}
+
+		// If the function hasn't returned already, we're confident that
+		// |obj| is a plain object, created by {} or constructed with new Object
+		return true;
+	},
+
+	isEmptyObject: function( obj ) {
+		var name;
+		for ( name in obj ) {
+			return false;
+		}
+		return true;
+	},
+
+	type: function( obj ) {
+		if ( obj == null ) {
+			return obj + "";
+		}
+		// Support: Android<4.0, iOS<6 (functionish RegExp)
+		return typeof obj === "object" || typeof obj === "function" ?
+			class2type[ toString.call(obj) ] || "object" :
+			typeof obj;
+	},
+
+	// Evaluates a script in a global context
+	globalEval: function( code ) {
+		var script,
+			indirect = eval;
+
+		code = jQuery.trim( code );
+
+		if ( code ) {
+			// If the code includes a valid, prologue position
+			// strict mode pragma, execute code by injecting a
+			// script tag into the document.
+			if ( code.indexOf("use strict") === 1 ) {
+				script = document.createElement("script");
+				script.text = code;
+				document.head.appendChild( script ).parentNode.removeChild( script );
+			} else {
+			// Otherwise, avoid the DOM node creation, insertion
+			// and removal by using an indirect global eval
+				indirect( code );
+			}
+		}
+	},
+
+	// Convert dashed to camelCase; used by the css and data modules
+	// Support: IE9-11+
+	// Microsoft forgot to hump their vendor prefix (#9572)
+	camelCase: function( string ) {
+		return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
+	},
+
+	nodeName: function( elem, name ) {
+		return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
+	},
+
+	// args is for internal usage only
+	each: function( obj, callback, args ) {
+		var value,
+			i = 0,
+			length = obj.length,
+			isArray = isArraylike( obj );
+
+		if ( args ) {
+			if ( isArray ) {
+				for ( ; i < length; i++ ) {
+					value = callback.apply( obj[ i ], args );
+
+					if ( value === false ) {
+						break;
+					}
+				}
+			} else {
+				for ( i in obj ) {
+					value = callback.apply( obj[ i ], args );
+
+					if ( value === false ) {
+						break;
+					}
+				}
+			}
+
+		// A special, fast, case for the most common use of each
+		} else {
+			if ( isArray ) {
+				for ( ; i < length; i++ ) {
+					value = callback.call( obj[ i ], i, obj[ i ] );
+
+					if ( value === false ) {
+						break;
+					}
+				}
+			} else {
+				for ( i in obj ) {
+					value = callback.call( obj[ i ], i, obj[ i ] );
+
+					if ( value === false ) {
+						break;
+					}
+				}
+			}
+		}
+
+		return obj;
+	},
+
+	// Support: Android<4.1
+	trim: function( text ) {
+		return text == null ?
+			"" :
+			( text + "" ).replace( rtrim, "" );
+	},
+
+	// results is for internal usage only
+	makeArray: function( arr, results ) {
+		var ret = results || [];
+
+		if ( arr != null ) {
+			if ( isArraylike( Object(arr) ) ) {
+				jQuery.merge( ret,
+					typeof arr === "string" ?
+					[ arr ] : arr
+				);
+			} else {
+				push.call( ret, arr );
+			}
+		}
+
+		return ret;
+	},
+
+	inArray: function( elem, arr, i ) {
+		return arr == null ? -1 : indexOf.call( arr, elem, i );
+	},
+
+	merge: function( first, second ) {
+		var len = +second.length,
+			j = 0,
+			i = first.length;
+
+		for ( ; j < len; j++ ) {
+			first[ i++ ] = second[ j ];
+		}
+
+		first.length = i;
+
+		return first;
+	},
+
+	grep: function( elems, callback, invert ) {
+		var callbackInverse,
+			matches = [],
+			i = 0,
+			length = elems.length,
+			callbackExpect = !invert;
+
+		// Go through the array, only saving the items
+		// that pass the validator function
+		for ( ; i < length; i++ ) {
+			callbackInverse = !callback( elems[ i ], i );
+			if ( callbackInverse !== callbackExpect ) {
+				matches.push( elems[ i ] );
+			}
+		}
+
+		return matches;
+	},
+
+	// arg is for internal usage only
+	map: function( elems, callback, arg ) {
+		var value,
+			i = 0,
+			length = elems.length,
+			isArray = isArraylike( elems ),
+			ret = [];
+
+		// Go through the array, translating each of the items to their new values
+		if ( isArray ) {
+			for ( ; i < length; i++ ) {
+				value = callback( elems[ i ], i, arg );
+
+				if ( value != null ) {
+					ret.push( value );
+				}
+			}
+
+		// Go through every key on the object,
+		} else {
+			for ( i in elems ) {
+				value = callback( elems[ i ], i, arg );
+
+				if ( value != null ) {
+					ret.push( value );
+				}
+			}
+		}
+
+		// Flatten any nested arrays
+		return concat.apply( [], ret );
+	},
+
+	// A global GUID counter for objects
+	guid: 1,
+
+	// Bind a function to a context, optionally partially applying any
+	// arguments.
+	proxy: function( fn, context ) {
+		var tmp, args, proxy;
+
+		if ( typeof context === "string" ) {
+			tmp = fn[ context ];
+			context = fn;
+			fn = tmp;
+		}
+
+		// Quick check to determine if target is callable, in the spec
+		// this throws a TypeError, but we will just return undefined.
+		if ( !jQuery.isFunction( fn ) ) {
+			return undefined;
+		}
+
+		// Simulated bind
+		args = slice.call( arguments, 2 );
+		proxy = function() {
+			return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
+		};
+
+		// Set the guid of unique handler to the same of original handler, so it can be removed
+		proxy.guid = fn.guid = fn.guid || jQuery.guid++;
+
+		return proxy;
+	},
+
+	now: Date.now,
+
+	// jQuery.support is not used in Core but other projects attach their
+	// properties to it so it needs to exist.
+	support: support
+});
+
+// Populate the class2type map
+jQuery.each("Boolean Number String Function Array Date RegExp Object Error".split(" "), function(i, name) {
+	class2type[ "[object " + name + "]" ] = name.toLowerCase();
+});
+
+function isArraylike( obj ) {
+
+	// Support: iOS 8.2 (not reproducible in simulator)
+	// `in` check used to prevent JIT error (gh-2145)
+	// hasOwn isn't used here due to false negatives
+	// regarding Nodelist length in IE
+	var length = "length" in obj && obj.length,
+		type = jQuery.type( obj );
+
+	if ( type === "function" || jQuery.isWindow( obj ) ) {
+		return false;
+	}
+
+	if ( obj.nodeType === 1 && length ) {
+		return true;
+	}
+
+	return type === "array" || length === 0 ||
+		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
+}
+var Sizzle =
+/*!
+ * Sizzle CSS Selector Engine v2.2.0-pre
+ * http://sizzlejs.com/
+ *
+ * Copyright 2008, 2014 jQuery Foundation, Inc. and other contributors
+ * Released under the MIT license
+ * http://jquery.org/license
+ *
+ * Date: 2014-12-16
+ */
+(function( window ) {
+
+var i,
+	support,
+	Expr,
+	getText,
+	isXML,
+	tokenize,
+	compile,
+	select,
+	outermostContext,
+	sortInput,
+	hasDuplicate,
+
+	// Local document vars
+	setDocument,
+	document,
+	docElem,
+	documentIsHTML,
+	rbuggyQSA,
+	rbuggyMatches,
+	matches,
+	contains,
+
+	// Instance-specific data
+	expando = "sizzle" + 1 * new Date(),
+	preferredDoc = window.document,
+	dirruns = 0,
+	done = 0,
+	classCache = createCache(),
+	tokenCache = createCache(),
+	compilerCache = createCache(),
+	sortOrder = function( a, b ) {
+		if ( a === b ) {
+			hasDuplicate = true;
+		}
+		return 0;
+	},
+
+	// General-purpose constants
+	MAX_NEGATIVE = 1 << 31,
+
+	// Instance methods
+	hasOwn = ({}).hasOwnProperty,
+	arr = [],
+	pop = arr.pop,
+	push_native = arr.push,
+	push = arr.push,
+	slice = arr.slice,
+	// Use a stripped-down indexOf as it's faster than native
+	// http://jsperf.com/thor-indexof-vs-for/5
+	indexOf = function( list, elem ) {
+		var i = 0,
+			len = list.length;
+		for ( ; i < len; i++ ) {
+			if ( list[i] === elem ) {
+				return i;
+			}
+		}
+		return -1;
+	},
+
+	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
+
+	// Regular expressions
+
+	// Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
+	whitespace = "[\\x20\\t\\r\\n\\f]",
+	// http://www.w3.org/TR/css3-syntax/#characters
+	characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",
+
+	// Loosely modeled on CSS identifier characters
+	// An unquoted value should be a CSS identifier http://www.w3.org/TR/css3-selectors/#attribute-selectors
+	// Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
+	identifier = characterEncoding.replace( "w", "w#" ),
+
+	// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
+	attributes = "\\[" + whitespace + "*(" + characterEncoding + ")(?:" + whitespace +
+		// Operator (capture 2)
+		"*([*^$|!~]?=)" + whitespace +
+		// "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
+		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
+		"*\\]",
+
+	pseudos = ":(" + characterEncoding + ")(?:\\((" +
+		// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
+		// 1. quoted (capture 3; capture 4 or capture 5)
+		"('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
+		// 2. simple (capture 6)
+		"((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
+		// 3. anything else (capture 2)
+		".*" +
+		")\\)|)",
+
+	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
+	rwhitespace = new RegExp( whitespace + "+", "g" ),
+	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
+
+	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
+	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
+
+	rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),
+
+	rpseudo = new RegExp( pseudos ),
+	ridentifier = new RegExp( "^" + identifier + "$" ),
+
+	matchExpr = {
+		"ID": new RegExp( "^#(" + characterEncoding + ")" ),
+		"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
+		"TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
+		"ATTR": new RegExp( "^" + attributes ),
+		"PSEUDO": new RegExp( "^" + pseudos ),
+		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
+			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
+			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
+		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
+		// For use in libraries implementing .is()
+		// We use this for POS matching in `select`
+		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
+			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
+	},
+
+	rinputs = /^(?:input|select|textarea|button)$/i,
+	rheader = /^h\d$/i,
+
+	rnative = /^[^{]+\{\s*\[native \w/,
+
+	// Easily-parseable/retrievable ID or TAG or CLASS selectors
+	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
+
+	rsibling = /[+~]/,
+	rescape = /'|\\/g,
+
+	// CSS escapes http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
+	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
+	funescape = function( _, escaped, escapedWhitespace ) {
+		var high = "0x" + escaped - 0x10000;
+		// NaN means non-codepoint
+		// Support: Firefox<24
+		// Workaround erroneous numeric interpretation of +"0x"
+		return high !== high || escapedWhitespace ?
+			escaped :
+			high < 0 ?
+				// BMP codepoint
+				String.fromCharCode( high + 0x10000 ) :
+				// Supplemental Plane codepoint (surrogate pair)
+				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
+	},
+
+	// Used for iframes
+	// See setDocument()
+	// Removing the function wrapper causes a "Permission Denied"
+	// error in IE
+	unloadHandler = function() {
+		setDocument();
+	};
+
+// Optimize for push.apply( _, NodeList )
+try {
+	push.apply(
+		(arr = slice.call( preferredDoc.childNodes )),
+		preferredDoc.childNodes
+	);
+	// Support: Android<4.0
+	// Detect silently failing push.apply
+	arr[ preferredDoc.childNodes.length ].nodeType;
+} catch ( e ) {
+	push = { apply: arr.length ?
+
+		// Leverage slice if possible
+		function( target, els ) {
+			push_native.apply( target, slice.call(els) );
+		} :
+
+		// Support: IE<9
+		// Otherwise append directly
+		function( target, els ) {
+			var j = target.length,
+				i = 0;
+			// Can't trust NodeList.length
+			while ( (target[j++] = els[i++]) ) {}
+			target.length = j - 1;
+		}
+	};
+}
+
+function Sizzle( selector, context, results, seed ) {
+	var match, elem, m, nodeType,
+		// QSA vars
+		i, groups, old, nid, newContext, newSelector;
+
+	if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
+		setDocument( context );
+	}
+
+	context = context || document;
+	results = results || [];
+	nodeType = context.nodeType;
+
+	if ( typeof selector !== "string" || !selector ||
+		nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {
+
+		return results;
+	}
+
+	if ( !seed && documentIsHTML ) {
+
+		// Try to shortcut find operations when possible (e.g., not under DocumentFragment)
+		if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
+			// Speed-up: Sizzle("#ID")
+			if ( (m = match[1]) ) {
+				if ( nodeType === 9 ) {
+					elem = context.getElementById( m );
+					// Check parentNode to catch when Blackberry 4.6 returns
+					// nodes that are no longer in the document (jQuery #6963)
+					if ( elem && elem.parentNode ) {
+						// Handle the case where IE, Opera, and Webkit return items
+						// by name instead of ID
+						if ( elem.id === m ) {
+							results.push( elem );
+							return results;
+						}
+					} else {
+						return results;
+					}
+				} else {
+					// Context is not a document
+					if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
+						contains( context, elem ) && elem.id === m ) {
+						results.push( elem );
+						return results;
+					}
+				}
+
+			// Speed-up: Sizzle("TAG")
+			} else if ( match[2] ) {
+				push.apply( results, context.getElementsByTagName( selector ) );
+				return results;
+
+			// Speed-up: Sizzle(".CLASS")
+			} else if ( (m = match[3]) && support.getElementsByClassName ) {
+				push.apply( results, context.getElementsByClassName( m ) );
+				return results;
+			}
+		}
+
+		// QSA path
+		if ( support.qsa && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
+			nid = old = expando;
+			newContext = context;
+			newSelector = nodeType !== 1 && selector;
+
+			// qSA works strangely on Element-rooted queries
+			// We can work around this by specifying an extra ID on the root
+			// and working up from there (Thanks to Andrew Dupont for the technique)
+			// IE 8 doesn't work on object elements
+			if ( nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
+				groups = tokenize( selector );
+
+				if ( (old = context.getAttribute("id")) ) {
+					nid = old.replace( rescape, "\\$&" );
+				} else {
+					context.setAttribute( "id", nid );
+				}
+				nid = "[id='" + nid + "'] ";
+
+				i = groups.length;
+				while ( i-- ) {
+					groups[i] = nid + toSelector( groups[i] );
+				}
+				newContext = rsibling.test( selector ) && testContext( context.parentNode ) || context;
+				newSelector = groups.join(",");
+			}
+
+			if ( newSelector ) {
+				try {
+					push.apply( results,
+						newContext.querySelectorAll( newSelector )
+					);
+					return results;
+				} catch(qsaError) {
+				} finally {
+					if ( !old ) {
+						context.removeAttribute("id");
+					}
+				}
+			}
+		}
+	}
+
+	// All others
+	return select( selector.replace( rtrim, "$1" ), context, results, seed );
+}
+
+/**
+ * Create key-value caches of limited size
+ * @returns {Function(string, Object)} Returns the Object data after storing it on itself with
+ *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
+ *	deleting the oldest entry
+ */
+function createCache() {
+	var keys = [];
+
+	function cache( key, value ) {
+		// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
+		if ( keys.push( key + " " ) > Expr.cacheLength ) {
+			// Only keep the most recent entries
+			delete cache[ keys.shift() ];
+		}
+		return (cache[ key + " " ] = value);
+	}
+	return cache;
+}
+
+/**
+ * Mark a function for special use by Sizzle
+ * @param {Function} fn The function to mark
+ */
+function markFunction( fn ) {
+	fn[ expando ] = true;
+	return fn;
+}
+
+/**
+ * Support testing using an element
+ * @param {Function} fn Passed the created div and expects a boolean result
+ */
+function assert( fn ) {
+	var div = document.createElement("div");
+
+	try {
+		return !!fn( div );
+	} catch (e) {
+		return false;
+	} finally {
+		// Remove from its parent by default
+		if ( div.parentNode ) {
+			div.parentNode.removeChild( div );
+		}
+		// release memory in IE
+		div = null;
+	}
+}
+
+/**
+ * Adds the same handler for all of the specified attrs
+ * @param {String} attrs Pipe-separated list of attributes
+ * @param {Function} handler The method that will be applied
+ */
+function addHandle( attrs, handler ) {
+	var arr = attrs.split("|"),
+		i = attrs.length;
+
+	while ( i-- ) {
+		Expr.attrHandle[ arr[i] ] = handler;
+	}
+}
+
+/**
+ * Checks document order of two siblings
+ * @param {Element} a
+ * @param {Element} b
+ * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
+ */
+function siblingCheck( a, b ) {
+	var cur = b && a,
+		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
+			( ~b.sourceIndex || MAX_NEGATIVE ) -
+			( ~a.sourceIndex || MAX_NEGATIVE );
+
+	// Use IE sourceIndex if available on both nodes
+	if ( diff ) {
+		return diff;
+	}
+
+	// Check if b follows a
+	if ( cur ) {
+		while ( (cur = cur.nextSibling) ) {
+			if ( cur === b ) {
+				return -1;
+			}
+		}
+	}
+
+	return a ? 1 : -1;
+}
+
+/**
+ * Returns a function to use in pseudos for input types
+ * @param {String} type
+ */
+function createInputPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return name === "input" && elem.type === type;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for buttons
+ * @param {String} type
+ */
+function createButtonPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return (name === "input" || name === "button") && elem.type === type;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for positionals
+ * @param {Function} fn
+ */
+function createPositionalPseudo( fn ) {
+	return markFunction(function( argument ) {
+		argument = +argument;
+		return markFunction(function( seed, matches ) {
+			var j,
+				matchIndexes = fn( [], seed.length, argument ),
+				i = matchIndexes.length;
+
+			// Match elements found at the specified indexes
+			while ( i-- ) {
+				if ( seed[ (j = matchIndexes[i]) ] ) {
+					seed[j] = !(matches[j] = seed[j]);
+				}
+			}
+		});
+	});
+}
+
+/**
+ * Checks a node for validity as a Sizzle context
+ * @param {Element|Object=} context
+ * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
+ */
+function testContext( context ) {
+	return context && typeof context.getElementsByTagName !== "undefined" && context;
+}
+
+// Expose support vars for convenience
+support = Sizzle.support = {};
+
+/**
+ * Detects XML nodes
+ * @param {Element|Object} elem An element or a document
+ * @returns {Boolean} True iff elem is a non-HTML XML node
+ */
+isXML = Sizzle.isXML = function( elem ) {
+	// documentElement is verified for cases where it doesn't yet exist
+	// (such as loading iframes in IE - #4833)
+	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
+	return documentElement ? documentElement.nodeName !== "HTML" : false;
+};
+
+/**
+ * Sets document-related variables once based on the current document
+ * @param {Element|Object} [doc] An element or document object to use to set the document
+ * @returns {Object} Returns the current document
+ */
+setDocument = Sizzle.setDocument = function( node ) {
+	var hasCompare, parent,
+		doc = node ? node.ownerDocument || node : preferredDoc;
+
+	// If no document and documentElement is available, return
+	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
+		return document;
+	}
+
+	// Set our document
+	document = doc;
+	docElem = doc.documentElement;
+	parent = doc.defaultView;
+
+	// Support: IE>8
+	// If iframe document is assigned to "document" variable and if iframe has been reloaded,
+	// IE will throw "permission denied" error when accessing "document" variable, see jQuery #13936
+	// IE6-8 do not support the defaultView property so parent will be undefined
+	if ( parent && parent !== parent.top ) {
+		// IE11 does not have attachEvent, so all must suffer
+		if ( parent.addEventListener ) {
+			parent.addEventListener( "unload", unloadHandler, false );
+		} else if ( parent.attachEvent ) {
+			parent.attachEvent( "onunload", unloadHandler );
+		}
+	}
+
+	/* Support tests
+	---------------------------------------------------------------------- */
+	documentIsHTML = !isXML( doc );
+
+	/* Attributes
+	---------------------------------------------------------------------- */
+
+	// Support: IE<8
+	// Verify that getAttribute really returns attributes and not properties
+	// (excepting IE8 booleans)
+	support.attributes = assert(function( div ) {
+		div.className = "i";
+		return !div.getAttribute("className");
+	});
+
+	/* getElement(s)By*
+	---------------------------------------------------------------------- */
+
+	// Check if getElementsByTagName("*") returns only elements
+	support.getElementsByTagName = assert(function( div ) {
+		div.appendChild( doc.createComment("") );
+		return !div.getElementsByTagName("*").length;
+	});
+
+	// Support: IE<9
+	support.getElementsByClassName = rnative.test( doc.getElementsByClassName );
+
+	// Support: IE<10
+	// Check if getElementById returns elements by name
+	// The broken getElementById methods don't pick up programatically-set names,
+	// so use a roundabout getElementsByName test
+	support.getById = assert(function( div ) {
+		docElem.appendChild( div ).id = expando;
+		return !doc.getElementsByName || !doc.getElementsByName( expando ).length;
+	});
+
+	// ID find and filter
+	if ( support.getById ) {
+		Expr.find["ID"] = function( id, context ) {
+			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
+				var m = context.getElementById( id );
+				// Check parentNode to catch when Blackberry 4.6 returns
+				// nodes that are no longer in the document #6963
+				return m && m.parentNode ? [ m ] : [];
+			}
+		};
+		Expr.filter["ID"] = function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				return elem.getAttribute("id") === attrId;
+			};
+		};
+	} else {
+		// Support: IE6/7
+		// getElementById is not reliable as a find shortcut
+		delete Expr.find["ID"];
+
+		Expr.filter["ID"] =  function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
+				return node && node.value === attrId;
+			};
+		};
+	}
+
+	// Tag
+	Expr.find["TAG"] = support.getElementsByTagName ?
+		function( tag, context ) {
+			if ( typeof context.getElementsByTagName !== "undefined" ) {
+				return context.getElementsByTagName( tag );
+
+			// DocumentFragment nodes don't have gEBTN
+			} else if ( support.qsa ) {
+				return context.querySelectorAll( tag );
+			}
+		} :
+
+		function( tag, context ) {
+			var elem,
+				tmp = [],
+				i = 0,
+				// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
+				results = context.getElementsByTagName( tag );
+
+			// Filter out possible comments
+			if ( tag === "*" ) {
+				while ( (elem = results[i++]) ) {
+					if ( elem.nodeType === 1 ) {
+						tmp.push( elem );
+					}
+				}
+
+				return tmp;
+			}
+			return results;
+		};
+
+	// Class
+	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
+		if ( documentIsHTML ) {
+			return context.getElementsByClassName( className );
+		}
+	};
+
+	/* QSA/matchesSelector
+	---------------------------------------------------------------------- */
+
+	// QSA and matchesSelector support
+
+	// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
+	rbuggyMatches = [];
+
+	// qSa(:focus) reports false when true (Chrome 21)
+	// We allow this because of a bug in IE8/9 that throws an error
+	// whenever `document.activeElement` is accessed on an iframe
+	// So, we allow :focus to pass through QSA all the time to avoid the IE error
+	// See http://bugs.jquery.com/ticket/13378
+	rbuggyQSA = [];
+
+	if ( (support.qsa = rnative.test( doc.querySelectorAll )) ) {
+		// Build QSA regex
+		// Regex strategy adopted from Diego Perini
+		assert(function( div ) {
+			// Select is set to empty string on purpose
+			// This is to test IE's treatment of not explicitly
+			// setting a boolean content attribute,
+			// since its presence should be enough
+			// http://bugs.jquery.com/ticket/12359
+			docElem.appendChild( div ).innerHTML = "<a id='" + expando + "'></a>" +
+				"<select id='" + expando + "-\f]' msallowcapture=''>" +
+				"<option selected=''></option></select>";
+
+			// Support: IE8, Opera 11-12.16
+			// Nothing should be selected when empty strings follow ^= or $= or *=
+			// The test attribute must be unknown in Opera but "safe" for WinRT
+			// http://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
+			if ( div.querySelectorAll("[msallowcapture^='']").length ) {
+				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
+			}
+
+			// Support: IE8
+			// Boolean attributes and "value" are not treated correctly
+			if ( !div.querySelectorAll("[selected]").length ) {
+				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
+			}
+
+			// Support: Chrome<29, Android<4.2+, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.7+
+			if ( !div.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
+				rbuggyQSA.push("~=");
+			}
+
+			// Webkit/Opera - :checked should return selected option elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			// IE8 throws error here and will not see later tests
+			if ( !div.querySelectorAll(":checked").length ) {
+				rbuggyQSA.push(":checked");
+			}
+
+			// Support: Safari 8+, iOS 8+
+			// https://bugs.webkit.org/show_bug.cgi?id=136851
+			// In-page `selector#id sibing-combinator selector` fails
+			if ( !div.querySelectorAll( "a#" + expando + "+*" ).length ) {
+				rbuggyQSA.push(".#.+[+~]");
+			}
+		});
+
+		assert(function( div ) {
+			// Support: Windows 8 Native Apps
+			// The type and name attributes are restricted during .innerHTML assignment
+			var input = doc.createElement("input");
+			input.setAttribute( "type", "hidden" );
+			div.appendChild( input ).setAttribute( "name", "D" );
+
+			// Support: IE8
+			// Enforce case-sensitivity of name attribute
+			if ( div.querySelectorAll("[name=d]").length ) {
+				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
+			}
+
+			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
+			// IE8 throws error here and will not see later tests
+			if ( !div.querySelectorAll(":enabled").length ) {
+				rbuggyQSA.push( ":enabled", ":disabled" );
+			}
+
+			// Opera 10-11 does not throw on post-comma invalid pseudos
+			div.querySelectorAll("*,:x");
+			rbuggyQSA.push(",.*:");
+		});
+	}
+
+	if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
+		docElem.webkitMatchesSelector ||
+		docElem.mozMatchesSelector ||
+		docElem.oMatchesSelector ||
+		docElem.msMatchesSelector) )) ) {
+
+		assert(function( div ) {
+			// Check to see if it's possible to do matchesSelector
+			// on a disconnected node (IE 9)
+			support.disconnectedMatch = matches.call( div, "div" );
+
+			// This should fail with an exception
+			// Gecko does not error, returns false instead
+			matches.call( div, "[s!='']:x" );
+			rbuggyMatches.push( "!=", pseudos );
+		});
+	}
+
+	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
+	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
+
+	/* Contains
+	---------------------------------------------------------------------- */
+	hasCompare = rnative.test( docElem.compareDocumentPosition );
+
+	// Element contains another
+	// Purposefully does not implement inclusive descendent
+	// As in, an element does not contain itself
+	contains = hasCompare || rnative.test( docElem.contains ) ?
+		function( a, b ) {
+			var adown = a.nodeType === 9 ? a.documentElement : a,
+				bup = b && b.parentNode;
+			return a === bup || !!( bup && bup.nodeType === 1 && (
+				adown.contains ?
+					adown.contains( bup ) :
+					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
+			));
+		} :
+		function( a, b ) {
+			if ( b ) {
+				while ( (b = b.parentNode) ) {
+					if ( b === a ) {
+						return true;
+					}
+				}
+			}
+			return false;
+		};
+
+	/* Sorting
+	---------------------------------------------------------------------- */
+
+	// Document order sorting
+	sortOrder = hasCompare ?
+	function( a, b ) {
+
+		// Flag for duplicate removal
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		// Sort on method existence if only one input has compareDocumentPosition
+		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
+		if ( compare ) {
+			return compare;
+		}
+
+		// Calculate position if both inputs belong to the same document
+		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
+			a.compareDocumentPosition( b ) :
+
+			// Otherwise we know they are disconnected
+			1;
+
+		// Disconnected nodes
+		if ( compare & 1 ||
+			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
+
+			// Choose the first element that is related to our preferred document
+			if ( a === doc || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
+				return -1;
+			}
+			if ( b === doc || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
+				return 1;
+			}
+
+			// Maintain original order
+			return sortInput ?
+				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
+				0;
+		}
+
+		return compare & 4 ? -1 : 1;
+	} :
+	function( a, b ) {
+		// Exit early if the nodes are identical
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		var cur,
+			i = 0,
+			aup = a.parentNode,
+			bup = b.parentNode,
+			ap = [ a ],
+			bp = [ b ];
+
+		// Parentless nodes are either documents or disconnected
+		if ( !aup || !bup ) {
+			return a === doc ? -1 :
+				b === doc ? 1 :
+				aup ? -1 :
+				bup ? 1 :
+				sortInput ?
+				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
+				0;
+
+		// If the nodes are siblings, we can do a quick check
+		} else if ( aup === bup ) {
+			return siblingCheck( a, b );
+		}
+
+		// Otherwise we need full lists of their ancestors for comparison
+		cur = a;
+		while ( (cur = cur.parentNode) ) {
+			ap.unshift( cur );
+		}
+		cur = b;
+		while ( (cur = cur.parentNode) ) {
+			bp.unshift( cur );
+		}
+
+		// Walk down the tree looking for a discrepancy
+		while ( ap[i] === bp[i] ) {
+			i++;
+		}
+
+		return i ?
+			// Do a sibling check if the nodes have a common ancestor
+			siblingCheck( ap[i], bp[i] ) :
+
+			// Otherwise nodes in our document sort first
+			ap[i] === preferredDoc ? -1 :
+			bp[i] === preferredDoc ? 1 :
+			0;
+	};
+
+	return doc;
+};
+
+Sizzle.matches = function( expr, elements ) {
+	return Sizzle( expr, null, null, elements );
+};
+
+Sizzle.matchesSelector = function( elem, expr ) {
+	// Set document vars if needed
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	// Make sure that attribute selectors are quoted
+	expr = expr.replace( rattributeQuotes, "='$1']" );
+
+	if ( support.matchesSelector && documentIsHTML &&
+		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
+		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
+
+		try {
+			var ret = matches.call( elem, expr );
+
+			// IE 9's matchesSelector returns false on disconnected nodes
+			if ( ret || support.disconnectedMatch ||
+					// As well, disconnected nodes are said to be in a document
+					// fragment in IE 9
+					elem.document && elem.document.nodeType !== 11 ) {
+				return ret;
+			}
+		} catch (e) {}
+	}
+
+	return Sizzle( expr, document, null, [ elem ] ).length > 0;
+};
+
+Sizzle.contains = function( context, elem ) {
+	// Set document vars if needed
+	if ( ( context.ownerDocument || context ) !== document ) {
+		setDocument( context );
+	}
+	return contains( context, elem );
+};
+
+Sizzle.attr = function( elem, name ) {
+	// Set document vars if needed
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	var fn = Expr.attrHandle[ name.toLowerCase() ],
+		// Don't get fooled by Object.prototype properties (jQuery #13807)
+		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
+			fn( elem, name, !documentIsHTML ) :
+			undefined;
+
+	return val !== undefined ?
+		val :
+		support.attributes || !documentIsHTML ?
+			elem.getAttribute( name ) :
+			(val = elem.getAttributeNode(name)) && val.specified ?
+				val.value :
+				null;
+};
+
+Sizzle.error = function( msg ) {
+	throw new Error( "Syntax error, unrecognized expression: " + msg );
+};
+
+/**
+ * Document sorting and removing duplicates
+ * @param {ArrayLike} results
+ */
+Sizzle.uniqueSort = function( results ) {
+	var elem,
+		duplicates = [],
+		j = 0,
+		i = 0;
+
+	// Unless we *know* we can detect duplicates, assume their presence
+	hasDuplicate = !support.detectDuplicates;
+	sortInput = !support.sortStable && results.slice( 0 );
+	results.sort( sortOrder );
+
+	if ( hasDuplicate ) {
+		while ( (elem = results[i++]) ) {
+			if ( elem === results[ i ] ) {
+				j = duplicates.push( i );
+			}
+		}
+		while ( j-- ) {
+			results.splice( duplicates[ j ], 1 );
+		}
+	}
+
+	// Clear input after sorting to release objects
+	// See https://github.com/jquery/sizzle/pull/225
+	sortInput = null;
+
+	return results;
+};
+
+/**
+ * Utility function for retrieving the text value of an array of DOM nodes
+ * @param {Array|Element} elem
+ */
+getText = Sizzle.getText = function( elem ) {
+	var node,
+		ret = "",
+		i = 0,
+		nodeType = elem.nodeType;
+
+	if ( !nodeType ) {
+		// If no nodeType, this is expected to be an array
+		while ( (node = elem[i++]) ) {
+			// Do not traverse comment nodes
+			ret += getText( node );
+		}
+	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
+		// Use textContent for elements
+		// innerText usage removed for consistency of new lines (jQuery #11153)
+		if ( typeof elem.textContent === "string" ) {
+			return elem.textContent;
+		} else {
+			// Traverse its children
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				ret += getText( elem );
+			}
+		}
+	} else if ( nodeType === 3 || nodeType === 4 ) {
+		return elem.nodeValue;
+	}
+	// Do not include comment or processing instruction nodes
+
+	return ret;
+};
+
+Expr = Sizzle.selectors = {
+
+	// Can be adjusted by the user
+	cacheLength: 50,
+
+	createPseudo: markFunction,
+
+	match: matchExpr,
+
+	attrHandle: {},
+
+	find: {},
+
+	relative: {
+		">": { dir: "parentNode", first: true },
+		" ": { dir: "parentNode" },
+		"+": { dir: "previousSibling", first: true },
+		"~": { dir: "previousSibling" }
+	},
+
+	preFilter: {
+		"ATTR": function( match ) {
+			match[1] = match[1].replace( runescape, funescape );
+
+			// Move the given value to match[3] whether quoted or unquoted
+			match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );
+
+			if ( match[2] === "~=" ) {
+				match[3] = " " + match[3] + " ";
+			}
+
+			return match.slice( 0, 4 );
+		},
+
+		"CHILD": function( match ) {
+			/* matches from matchExpr["CHILD"]
+				1 type (only|nth|...)
+				2 what (child|of-type)
+				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
+				4 xn-component of xn+y argument ([+-]?\d*n|)
+				5 sign of xn-component
+				6 x of xn-component
+				7 sign of y-component
+				8 y of y-component
+			*/
+			match[1] = match[1].toLowerCase();
+
+			if ( match[1].slice( 0, 3 ) === "nth" ) {
+				// nth-* requires argument
+				if ( !match[3] ) {
+					Sizzle.error( match[0] );
+				}
+
+				// numeric x and y parameters for Expr.filter.CHILD
+				// remember that false/true cast respectively to 0/1
+				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
+				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
+
+			// other types prohibit arguments
+			} else if ( match[3] ) {
+				Sizzle.error( match[0] );
+			}
+
+			return match;
+		},
+
+		"PSEUDO": function( match ) {
+			var excess,
+				unquoted = !match[6] && match[2];
+
+			if ( matchExpr["CHILD"].test( match[0] ) ) {
+				return null;
+			}
+
+			// Accept quoted arguments as-is
+			if ( match[3] ) {
+				match[2] = match[4] || match[5] || "";
+
+			// Strip excess characters from unquoted arguments
+			} else if ( unquoted && rpseudo.test( unquoted ) &&
+				// Get excess from tokenize (recursively)
+				(excess = tokenize( unquoted, true )) &&
+				// advance to the next closing parenthesis
+				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
+
+				// excess is a negative index
+				match[0] = match[0].slice( 0, excess );
+				match[2] = unquoted.slice( 0, excess );
+			}
+
+			// Return only captures needed by the pseudo filter method (type and argument)
+			return match.slice( 0, 3 );
+		}
+	},
+
+	filter: {
+
+		"TAG": function( nodeNameSelector ) {
+			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
+			return nodeNameSelector === "*" ?
+				function() { return true; } :
+				function( elem ) {
+					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
+				};
+		},
+
+		"CLASS": function( className ) {
+			var pattern = classCache[ className + " " ];
+
+			return pattern ||
+				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
+				classCache( className, function( elem ) {
+					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
+				});
+		},
+
+		"ATTR": function( name, operator, check ) {
+			return function( elem ) {
+				var result = Sizzle.attr( elem, name );
+
+				if ( result == null ) {
+					return operator === "!=";
+				}
+				if ( !operator ) {
+					return true;
+				}
+
+				result += "";
+
+				return operator === "=" ? result === check :
+					operator === "!=" ? result !== check :
+					operator === "^=" ? check && result.indexOf( check ) === 0 :
+					operator === "*=" ? check && result.indexOf( check ) > -1 :
+					operator === "$=" ? check && result.slice( -check.length ) === check :
+					operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
+					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
+					false;
+			};
+		},
+
+		"CHILD": function( type, what, argument, first, last ) {
+			var simple = type.slice( 0, 3 ) !== "nth",
+				forward = type.slice( -4 ) !== "last",
+				ofType = what === "of-type";
+
+			return first === 1 && last === 0 ?
+
+				// Shortcut for :nth-*(n)
+				function( elem ) {
+					return !!elem.parentNode;
+				} :
+
+				function( elem, context, xml ) {
+					var cache, outerCache, node, diff, nodeIndex, start,
+						dir = simple !== forward ? "nextSibling" : "previousSibling",
+						parent = elem.parentNode,
+						name = ofType && elem.nodeName.toLowerCase(),
+						useCache = !xml && !ofType;
+
+					if ( parent ) {
+
+						// :(first|last|only)-(child|of-type)
+						if ( simple ) {
+							while ( dir ) {
+								node = elem;
+								while ( (node = node[ dir ]) ) {
+									if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
+										return false;
+									}
+								}
+								// Reverse direction for :only-* (if we haven't yet done so)
+								start = dir = type === "only" && !start && "nextSibling";
+							}
+							return true;
+						}
+
+						start = [ forward ? parent.firstChild : parent.lastChild ];
+
+						// non-xml :nth-child(...) stores cache data on `parent`
+						if ( forward && useCache ) {
+							// Seek `elem` from a previously-cached index
+							outerCache = parent[ expando ] || (parent[ expando ] = {});
+							cache = outerCache[ type ] || [];
+							nodeIndex = cache[0] === dirruns && cache[1];
+							diff = cache[0] === dirruns && cache[2];
+							node = nodeIndex && parent.childNodes[ nodeIndex ];
+
+							while ( (node = ++nodeIndex && node && node[ dir ] ||
+
+								// Fallback to seeking `elem` from the start
+								(diff = nodeIndex = 0) || start.pop()) ) {
+
+								// When found, cache indexes on `parent` and break
+								if ( node.nodeType === 1 && ++diff && node === elem ) {
+									outerCache[ type ] = [ dirruns, nodeIndex, diff ];
+									break;
+								}
+							}
+
+						// Use previously-cached element index if available
+						} else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
+							diff = cache[1];
+
+						// xml :nth-child(...) or :nth-last-child(...) or :nth(-last)?-of-type(...)
+						} else {
+							// Use the same loop as above to seek `elem` from the start
+							while ( (node = ++nodeIndex && node && node[ dir ] ||
+								(diff = nodeIndex = 0) || start.pop()) ) {
+
+								if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
+									// Cache the index of each encountered element
+									if ( useCache ) {
+										(node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
+									}
+
+									if ( node === elem ) {
+										break;
+									}
+								}
+							}
+						}
+
+						// Incorporate the offset, then check against cycle size
+						diff -= last;
+						return diff === first || ( diff % first === 0 && diff / first >= 0 );
+					}
+				};
+		},
+
+		"PSEUDO": function( pseudo, argument ) {
+			// pseudo-class names are case-insensitive
+			// http://www.w3.org/TR/selectors/#pseudo-classes
+			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
+			// Remember that setFilters inherits from pseudos
+			var args,
+				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
+					Sizzle.error( "unsupported pseudo: " + pseudo );
+
+			// The user may use createPseudo to indicate that
+			// arguments are needed to create the filter function
+			// just as Sizzle does
+			if ( fn[ expando ] ) {
+				return fn( argument );
+			}
+
+			// But maintain support for old signatures
+			if ( fn.length > 1 ) {
+				args = [ pseudo, pseudo, "", argument ];
+				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
+					markFunction(function( seed, matches ) {
+						var idx,
+							matched = fn( seed, argument ),
+							i = matched.length;
+						while ( i-- ) {
+							idx = indexOf( seed, matched[i] );
+							seed[ idx ] = !( matches[ idx ] = matched[i] );
+						}
+					}) :
+					function( elem ) {
+						return fn( elem, 0, args );
+					};
+			}
+
+			return fn;
+		}
+	},
+
+	pseudos: {
+		// Potentially complex pseudos
+		"not": markFunction(function( selector ) {
+			// Trim the selector passed to compile
+			// to avoid treating leading and trailing
+			// spaces as combinators
+			var input = [],
+				results = [],
+				matcher = compile( selector.replace( rtrim, "$1" ) );
+
+			return matcher[ expando ] ?
+				markFunction(function( seed, matches, context, xml ) {
+					var elem,
+						unmatched = matcher( seed, null, xml, [] ),
+						i = seed.length;
+
+					// Match elements unmatched by `matcher`
+					while ( i-- ) {
+						if ( (elem = unmatched[i]) ) {
+							seed[i] = !(matches[i] = elem);
+						}
+					}
+				}) :
+				function( elem, context, xml ) {
+					input[0] = elem;
+					matcher( input, null, xml, results );
+					// Don't keep the element (issue #299)
+					input[0] = null;
+					return !results.pop();
+				};
+		}),
+
+		"has": markFunction(function( selector ) {
+			return function( elem ) {
+				return Sizzle( selector, elem ).length > 0;
+			};
+		}),
+
+		"contains": markFunction(function( text ) {
+			text = text.replace( runescape, funescape );
+			return function( elem ) {
+				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
+			};
+		}),
+
+		// "Whether an element is represented by a :lang() selector
+		// is based solely on the element's language value
+		// being equal to the identifier C,
+		// or beginning with the identifier C immediately followed by "-".
+		// The matching of C against the element's language value is performed case-insensitively.
+		// The identifier C does not have to be a valid language name."
+		// http://www.w3.org/TR/selectors/#lang-pseudo
+		"lang": markFunction( function( lang ) {
+			// lang value must be a valid identifier
+			if ( !ridentifier.test(lang || "") ) {
+				Sizzle.error( "unsupported lang: " + lang );
+			}
+			lang = lang.replace( runescape, funescape ).toLowerCase();
+			return function( elem ) {
+				var elemLang;
+				do {
+					if ( (elemLang = documentIsHTML ?
+						elem.lang :
+						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
+
+						elemLang = elemLang.toLowerCase();
+						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
+					}
+				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
+				return false;
+			};
+		}),
+
+		// Miscellaneous
+		"target": function( elem ) {
+			var hash = window.location && window.location.hash;
+			return hash && hash.slice( 1 ) === elem.id;
+		},
+
+		"root": function( elem ) {
+			return elem === docElem;
+		},
+
+		"focus": function( elem ) {
+			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
+		},
+
+		// Boolean properties
+		"enabled": function( elem ) {
+			return elem.disabled === false;
+		},
+
+		"disabled": function( elem ) {
+			return elem.disabled === true;
+		},
+
+		"checked": function( elem ) {
+			// In CSS3, :checked should return both checked and selected elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			var nodeName = elem.nodeName.toLowerCase();
+			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
+		},
+
+		"selected": function( elem ) {
+			// Accessing this property makes selected-by-default
+			// options in Safari work properly
+			if ( elem.parentNode ) {
+				elem.parentNode.selectedIndex;
+			}
+
+			return elem.selected === true;
+		},
+
+		// Contents
+		"empty": function( elem ) {
+			// http://www.w3.org/TR/selectors/#empty-pseudo
+			// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
+			//   but not by others (comment: 8; processing instruction: 7; etc.)
+			// nodeType < 6 works because attributes (2) do not appear as children
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				if ( elem.nodeType < 6 ) {
+					return false;
+				}
+			}
+			return true;
+		},
+
+		"parent": function( elem ) {
+			return !Expr.pseudos["empty"]( elem );
+		},
+
+		// Element/input types
+		"header": function( elem ) {
+			return rheader.test( elem.nodeName );
+		},
+
+		"input": function( elem ) {
+			return rinputs.test( elem.nodeName );
+		},
+
+		"button": function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return name === "input" && elem.type === "button" || name === "button";
+		},
+
+		"text": function( elem ) {
+			var attr;
+			return elem.nodeName.toLowerCase() === "input" &&
+				elem.type === "text" &&
+
+				// Support: IE<8
+				// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
+				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
+		},
+
+		// Position-in-collection
+		"first": createPositionalPseudo(function() {
+			return [ 0 ];
+		}),
+
+		"last": createPositionalPseudo(function( matchIndexes, length ) {
+			return [ length - 1 ];
+		}),
+
+		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			return [ argument < 0 ? argument + length : argument ];
+		}),
+
+		"even": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 0;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"odd": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 1;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ? argument + length : argument;
+			for ( ; --i >= 0; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ? argument + length : argument;
+			for ( ; ++i < length; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		})
+	}
+};
+
+Expr.pseudos["nth"] = Expr.pseudos["eq"];
+
+// Add button/input type pseudos
+for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
+	Expr.pseudos[ i ] = createInputPseudo( i );
+}
+for ( i in { submit: true, reset: true } ) {
+	Expr.pseudos[ i ] = createButtonPseudo( i );
+}
+
+// Easy API for creating new setFilters
+function setFilters() {}
+setFilters.prototype = Expr.filters = Expr.pseudos;
+Expr.setFilters = new setFilters();
+
+tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
+	var matched, match, tokens, type,
+		soFar, groups, preFilters,
+		cached = tokenCache[ selector + " " ];
+
+	if ( cached ) {
+		return parseOnly ? 0 : cached.slice( 0 );
+	}
+
+	soFar = selector;
+	groups = [];
+	preFilters = Expr.preFilter;
+
+	while ( soFar ) {
+
+		// Comma and first run
+		if ( !matched || (match = rcomma.exec( soFar )) ) {
+			if ( match ) {
+				// Don't consume trailing commas as valid
+				soFar = soFar.slice( match[0].length ) || soFar;
+			}
+			groups.push( (tokens = []) );
+		}
+
+		matched = false;
+
+		// Combinators
+		if ( (match = rcombinators.exec( soFar )) ) {
+			matched = match.shift();
+			tokens.push({
+				value: matched,
+				// Cast descendant combinators to space
+				type: match[0].replace( rtrim, " " )
+			});
+			soFar = soFar.slice( matched.length );
+		}
+
+		// Filters
+		for ( type in Expr.filter ) {
+			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
+				(match = preFilters[ type ]( match ))) ) {
+				matched = match.shift();
+				tokens.push({
+					value: matched,
+					type: type,
+					matches: match
+				});
+				soFar = soFar.slice( matched.length );
+			}
+		}
+
+		if ( !matched ) {
+			break;
+		}
+	}
+
+	// Return the length of the invalid excess
+	// if we're just parsing
+	// Otherwise, throw an error or return tokens
+	return parseOnly ?
+		soFar.length :
+		soFar ?
+			Sizzle.error( selector ) :
+			// Cache the tokens
+			tokenCache( selector, groups ).slice( 0 );
+};
+
+function toSelector( tokens ) {
+	var i = 0,
+		len = tokens.length,
+		selector = "";
+	for ( ; i < len; i++ ) {
+		selector += tokens[i].value;
+	}
+	return selector;
+}
+
+function addCombinator( matcher, combinator, base ) {
+	var dir = combinator.dir,
+		checkNonElements = base && dir === "parentNode",
+		doneName = done++;
+
+	return combinator.first ?
+		// Check against closest ancestor/preceding element
+		function( elem, context, xml ) {
+			while ( (elem = elem[ dir ]) ) {
+				if ( elem.nodeType === 1 || checkNonElements ) {
+					return matcher( elem, context, xml );
+				}
+			}
+		} :
+
+		// Check against all ancestor/preceding elements
+		function( elem, context, xml ) {
+			var oldCache, outerCache,
+				newCache = [ dirruns, doneName ];
+
+			// We can't set arbitrary data on XML nodes, so they don't benefit from dir caching
+			if ( xml ) {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						if ( matcher( elem, context, xml ) ) {
+							return true;
+						}
+					}
+				}
+			} else {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						outerCache = elem[ expando ] || (elem[ expando ] = {});
+						if ( (oldCache = outerCache[ dir ]) &&
+							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
+
+							// Assign to newCache so results back-propagate to previous elements
+							return (newCache[ 2 ] = oldCache[ 2 ]);
+						} else {
+							// Reuse newcache so results back-propagate to previous elements
+							outerCache[ dir ] = newCache;
+
+							// A match means we're done; a fail means we have to keep checking
+							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
+								return true;
+							}
+						}
+					}
+				}
+			}
+		};
+}
+
+function elementMatcher( matchers ) {
+	return matchers.length > 1 ?
+		function( elem, context, xml ) {
+			var i = matchers.length;
+			while ( i-- ) {
+				if ( !matchers[i]( elem, context, xml ) ) {
+					return false;
+				}
+			}
+			return true;
+		} :
+		matchers[0];
+}
+
+function multipleContexts( selector, contexts, results ) {
+	var i = 0,
+		len = contexts.length;
+	for ( ; i < len; i++ ) {
+		Sizzle( selector, contexts[i], results );
+	}
+	return results;
+}
+
+function condense( unmatched, map, filter, context, xml ) {
+	var elem,
+		newUnmatched = [],
+		i = 0,
+		len = unmatched.length,
+		mapped = map != null;
+
+	for ( ; i < len; i++ ) {
+		if ( (elem = unmatched[i]) ) {
+			if ( !filter || filter( elem, context, xml ) ) {
+				newUnmatched.push( elem );
+				if ( mapped ) {
+					map.push( i );
+				}
+			}
+		}
+	}
+
+	return newUnmatched;
+}
+
+function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
+	if ( postFilter && !postFilter[ expando ] ) {
+		postFilter = setMatcher( postFilter );
+	}
+	if ( postFinder && !postFinder[ expando ] ) {
+		postFinder = setMatcher( postFinder, postSelector );
+	}
+	return markFunction(function( seed, results, context, xml ) {
+		var temp, i, elem,
+			preMap = [],
+			postMap = [],
+			preexisting = results.length,
+
+			// Get initial elements from seed or context
+			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
+
+			// Prefilter to get matcher input, preserving a map for seed-results synchronization
+			matcherIn = preFilter && ( seed || !selector ) ?
+				condense( elems, preMap, preFilter, context, xml ) :
+				elems,
+
+			matcherOut = matcher ?
+				// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
+				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
+
+					// ...intermediate processing is necessary
+					[] :
+
+					// ...otherwise use results directly
+					results :
+				matcherIn;
+
+		// Find primary matches
+		if ( matcher ) {
+			matcher( matcherIn, matcherOut, context, xml );
+		}
+
+		// Apply postFilter
+		if ( postFilter ) {
+			temp = condense( matcherOut, postMap );
+			postFilter( temp, [], context, xml );
+
+			// Un-match failing elements by moving them back to matcherIn
+			i = temp.length;
+			while ( i-- ) {
+				if ( (elem = temp[i]) ) {
+					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
+				}
+			}
+		}
+
+		if ( seed ) {
+			if ( postFinder || preFilter ) {
+				if ( postFinder ) {
+					// Get the final matcherOut by condensing this intermediate into postFinder contexts
+					temp = [];
+					i = matcherOut.length;
+					while ( i-- ) {
+						if ( (elem = matcherOut[i]) ) {
+							// Restore matcherIn since elem is not yet a final match
+							temp.push( (matcherIn[i] = elem) );
+						}
+					}
+					postFinder( null, (matcherOut = []), temp, xml );
+				}
+
+				// Move matched elements from seed to results to keep them synchronized
+				i = matcherOut.length;
+				while ( i-- ) {
+					if ( (elem = matcherOut[i]) &&
+						(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
+
+						seed[temp] = !(results[temp] = elem);
+					}
+				}
+			}
+
+		// Add elements to results, through postFinder if defined
+		} else {
+			matcherOut = condense(
+				matcherOut === results ?
+					matcherOut.splice( preexisting, matcherOut.length ) :
+					matcherOut
+			);
+			if ( postFinder ) {
+				postFinder( null, results, matcherOut, xml );
+			} else {
+				push.apply( results, matcherOut );
+			}
+		}
+	});
+}
+
+function matcherFromTokens( tokens ) {
+	var checkContext, matcher, j,
+		len = tokens.length,
+		leadingRelative = Expr.relative[ tokens[0].type ],
+		implicitRelative = leadingRelative || Expr.relative[" "],
+		i = leadingRelative ? 1 : 0,
+
+		// The foundational matcher ensures that elements are reachable from top-level context(s)
+		matchContext = addCombinator( function( elem ) {
+			return elem === checkContext;
+		}, implicitRelative, true ),
+		matchAnyContext = addCombinator( function( elem ) {
+			return indexOf( checkContext, elem ) > -1;
+		}, implicitRelative, true ),
+		matchers = [ function( elem, context, xml ) {
+			var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
+				(checkContext = context).nodeType ?
+					matchContext( elem, context, xml ) :
+					matchAnyContext( elem, context, xml ) );
+			// Avoid hanging onto element (issue #299)
+			checkContext = null;
+			return ret;
+		} ];
+
+	for ( ; i < len; i++ ) {
+		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
+			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
+		} else {
+			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
+
+			// Return special upon seeing a positional matcher
+			if ( matcher[ expando ] ) {
+				// Find the next relative operator (if any) for proper handling
+				j = ++i;
+				for ( ; j < len; j++ ) {
+					if ( Expr.relative[ tokens[j].type ] ) {
+						break;
+					}
+				}
+				return setMatcher(
+					i > 1 && elementMatcher( matchers ),
+					i > 1 && toSelector(
+						// If the preceding token was a descendant combinator, insert an implicit any-element `*`
+						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
+					).replace( rtrim, "$1" ),
+					matcher,
+					i < j && matcherFromTokens( tokens.slice( i, j ) ),
+					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
+					j < len && toSelector( tokens )
+				);
+			}
+			matchers.push( matcher );
+		}
+	}
+
+	return elementMatcher( matchers );
+}
+
+function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
+	var bySet = setMatchers.length > 0,
+		byElement = elementMatchers.length > 0,
+		superMatcher = function( seed, context, xml, results, outermost ) {
+			var elem, j, matcher,
+				matchedCount = 0,
+				i = "0",
+				unmatched = seed && [],
+				setMatched = [],
+				contextBackup = outermostContext,
+				// We must always have either seed elements or outermost context
+				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
+				// Use integer dirruns iff this is the outermost matcher
+				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
+				len = elems.length;
+
+			if ( outermost ) {
+				outermostContext = context !== document && context;
+			}
+
+			// Add elements passing elementMatchers directly to results
+			// Keep `i` a string if there are no elements so `matchedCount` will be "00" below
+			// Support: IE<9, Safari
+			// Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
+			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
+				if ( byElement && elem ) {
+					j = 0;
+					while ( (matcher = elementMatchers[j++]) ) {
+						if ( matcher( elem, context, xml ) ) {
+							results.push( elem );
+							break;
+						}
+					}
+					if ( outermost ) {
+						dirruns = dirrunsUnique;
+					}
+				}
+
+				// Track unmatched elements for set filters
+				if ( bySet ) {
+					// They will have gone through all possible matchers
+					if ( (elem = !matcher && elem) ) {
+						matchedCount--;
+					}
+
+					// Lengthen the array for every element, matched or not
+					if ( seed ) {
+						unmatched.push( elem );
+					}
+				}
+			}
+
+			// Apply set filters to unmatched elements
+			matchedCount += i;
+			if ( bySet && i !== matchedCount ) {
+				j = 0;
+				while ( (matcher = setMatchers[j++]) ) {
+					matcher( unmatched, setMatched, context, xml );
+				}
+
+				if ( seed ) {
+					// Reintegrate element matches to eliminate the need for sorting
+					if ( matchedCount > 0 ) {
+						while ( i-- ) {
+							if ( !(unmatched[i] || setMatched[i]) ) {
+								setMatched[i] = pop.call( results );
+							}
+						}
+					}
+
+					// Discard index placeholder values to get only actual matches
+					setMatched = condense( setMatched );
+				}
+
+				// Add matches to results
+				push.apply( results, setMatched );
+
+				// Seedless set matches succeeding multiple successful matchers stipulate sorting
+				if ( outermost && !seed && setMatched.length > 0 &&
+					( matchedCount + setMatchers.length ) > 1 ) {
+
+					Sizzle.uniqueSort( results );
+				}
+			}
+
+			// Override manipulation of globals by nested matchers
+			if ( outermost ) {
+				dirruns = dirrunsUnique;
+				outermostContext = contextBackup;
+			}
+
+			return unmatched;
+		};
+
+	return bySet ?
+		markFunction( superMatcher ) :
+		superMatcher;
+}
+
+compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
+	var i,
+		setMatchers = [],
+		elementMatchers = [],
+		cached = compilerCache[ selector + " " ];
+
+	if ( !cached ) {
+		// Generate a function of recursive functions that can be used to check each element
+		if ( !match ) {
+			match = tokenize( selector );
+		}
+		i = match.length;
+		while ( i-- ) {
+			cached = matcherFromTokens( match[i] );
+			if ( cached[ expando ] ) {
+				setMatchers.push( cached );
+			} else {
+				elementMatchers.push( cached );
+			}
+		}
+
+		// Cache the compiled function
+		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
+
+		// Save selector and tokenization
+		cached.selector = selector;
+	}
+	return cached;
+};
+
+/**
+ * A low-level selection function that works with Sizzle's compiled
+ *  selector functions
+ * @param {String|Function} selector A selector or a pre-compiled
+ *  selector function built with Sizzle.compile
+ * @param {Element} context
+ * @param {Array} [results]
+ * @param {Array} [seed] A set of elements to match against
+ */
+select = Sizzle.select = function( selector, context, results, seed ) {
+	var i, tokens, token, type, find,
+		compiled = typeof selector === "function" && selector,
+		match = !seed && tokenize( (selector = compiled.selector || selector) );
+
+	results = results || [];
+
+	// Try to minimize operations if there is no seed and only one group
+	if ( match.length === 1 ) {
+
+		// Take a shortcut and set the context if the root selector is an ID
+		tokens = match[0] = match[0].slice( 0 );
+		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
+				support.getById && context.nodeType === 9 && documentIsHTML &&
+				Expr.relative[ tokens[1].type ] ) {
+
+			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
+			if ( !context ) {
+				return results;
+
+			// Precompiled matchers will still verify ancestry, so step up a level
+			} else if ( compiled ) {
+				context = context.parentNode;
+			}
+
+			selector = selector.slice( tokens.shift().value.length );
+		}
+
+		// Fetch a seed set for right-to-left matching
+		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
+		while ( i-- ) {
+			token = tokens[i];
+
+			// Abort if we hit a combinator
+			if ( Expr.relative[ (type = token.type) ] ) {
+				break;
+			}
+			if ( (find = Expr.find[ type ]) ) {
+				// Search, expanding context for leading sibling combinators
+				if ( (seed = find(
+					token.matches[0].replace( runescape, funescape ),
+					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
+				)) ) {
+
+					// If seed is empty or no tokens remain, we can return early
+					tokens.splice( i, 1 );
+					selector = seed.length && toSelector( tokens );
+					if ( !selector ) {
+						push.apply( results, seed );
+						return results;
+					}
+
+					break;
+				}
+			}
+		}
+	}
+
+	// Compile and execute a filtering function if one is not provided
+	// Provide `match` to avoid retokenization if we modified the selector above
+	( compiled || compile( selector, match ) )(
+		seed,
+		context,
+		!documentIsHTML,
+		results,
+		rsibling.test( selector ) && testContext( context.parentNode ) || context
+	);
+	return results;
+};
+
+// One-time assignments
+
+// Sort stability
+support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
+
+// Support: Chrome 14-35+
+// Always assume duplicates if they aren't passed to the comparison function
+support.detectDuplicates = !!hasDuplicate;
+
+// Initialize against the default document
+setDocument();
+
+// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
+// Detached nodes confoundingly follow *each other*
+support.sortDetached = assert(function( div1 ) {
+	// Should return 1, but returns 4 (following)
+	return div1.compareDocumentPosition( document.createElement("div") ) & 1;
+});
+
+// Support: IE<8
+// Prevent attribute/property "interpolation"
+// http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
+if ( !assert(function( div ) {
+	div.innerHTML = "<a href='#'></a>";
+	return div.firstChild.getAttribute("href") === "#" ;
+}) ) {
+	addHandle( "type|href|height|width", function( elem, name, isXML ) {
+		if ( !isXML ) {
+			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
+		}
+	});
+}
+
+// Support: IE<9
+// Use defaultValue in place of getAttribute("value")
+if ( !support.attributes || !assert(function( div ) {
+	div.innerHTML = "<input/>";
+	div.firstChild.setAttribute( "value", "" );
+	return div.firstChild.getAttribute( "value" ) === "";
+}) ) {
+	addHandle( "value", function( elem, name, isXML ) {
+		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
+			return elem.defaultValue;
+		}
+	});
+}
+
+// Support: IE<9
+// Use getAttributeNode to fetch booleans when getAttribute lies
+if ( !assert(function( div ) {
+	return div.getAttribute("disabled") == null;
+}) ) {
+	addHandle( booleans, function( elem, name, isXML ) {
+		var val;
+		if ( !isXML ) {
+			return elem[ name ] === true ? name.toLowerCase() :
+					(val = elem.getAttributeNode( name )) && val.specified ?
+					val.value :
+				null;
+		}
+	});
+}
+
+return Sizzle;
+
+})( window );
+
+
+
+jQuery.find = Sizzle;
+jQuery.expr = Sizzle.selectors;
+jQuery.expr[":"] = jQuery.expr.pseudos;
+jQuery.unique = Sizzle.uniqueSort;
+jQuery.text = Sizzle.getText;
+jQuery.isXMLDoc = Sizzle.isXML;
+jQuery.contains = Sizzle.contains;
+
+
+
+var rneedsContext = jQuery.expr.match.needsContext;
+
+var rsingleTag = (/^<(\w+)\s*\/?>(?:<\/\1>|)$/);
+
+
+
+var risSimple = /^.[^:#\[\.,]*$/;
+
+// Implement the identical functionality for filter and not
+function winnow( elements, qualifier, not ) {
+	if ( jQuery.isFunction( qualifier ) ) {
+		return jQuery.grep( elements, function( elem, i ) {
+			/* jshint -W018 */
+			return !!qualifier.call( elem, i, elem ) !== not;
+		});
+
+	}
+
+	if ( qualifier.nodeType ) {
+		return jQuery.grep( elements, function( elem ) {
+			return ( elem === qualifier ) !== not;
+		});
+
+	}
+
+	if ( typeof qualifier === "string" ) {
+		if ( risSimple.test( qualifier ) ) {
+			return jQuery.filter( qualifier, elements, not );
+		}
+
+		qualifier = jQuery.filter( qualifier, elements );
+	}
+
+	return jQuery.grep( elements, function( elem ) {
+		return ( indexOf.call( qualifier, elem ) >= 0 ) !== not;
+	});
+}
+
+jQuery.filter = function( expr, elems, not ) {
+	var elem = elems[ 0 ];
+
+	if ( not ) {
+		expr = ":not(" + expr + ")";
+	}
+
+	return elems.length === 1 && elem.nodeType === 1 ?
+		jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
+		jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
+			return elem.nodeType === 1;
+		}));
+};
+
+jQuery.fn.extend({
+	find: function( selector ) {
+		var i,
+			len = this.length,
+			ret = [],
+			self = this;
+
+		if ( typeof selector !== "string" ) {
+			return this.pushStack( jQuery( selector ).filter(function() {
+				for ( i = 0; i < len; i++ ) {
+					if ( jQuery.contains( self[ i ], this ) ) {
+						return true;
+					}
+				}
+			}) );
+		}
+
+		for ( i = 0; i < len; i++ ) {
+			jQuery.find( selector, self[ i ], ret );
+		}
+
+		// Needed because $( selector, context ) becomes $( context ).find( selector )
+		ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
+		ret.selector = this.selector ? this.selector + " " + selector : selector;
+		return ret;
+	},
+	filter: function( selector ) {
+		return this.pushStack( winnow(this, selector || [], false) );
+	},
+	not: function( selector ) {
+		return this.pushStack( winnow(this, selector || [], true) );
+	},
+	is: function( selector ) {
+		return !!winnow(
+			this,
+
+			// If this is a positional/relative selector, check membership in the returned set
+			// so $("p:first").is("p:last") won't return true for a doc with two "p".
+			typeof selector === "string" && rneedsContext.test( selector ) ?
+				jQuery( selector ) :
+				selector || [],
+			false
+		).length;
+	}
+});
+
+
+// Initialize a jQuery object
+
+
+// A central reference to the root jQuery(document)
+var rootjQuery,
+
+	// A simple way to check for HTML strings
+	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
+	// Strict HTML recognition (#11290: must start with <)
+	rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]*))$/,
+
+	init = jQuery.fn.init = function( selector, context ) {
+		var match, elem;
+
+		// HANDLE: $(""), $(null), $(undefined), $(false)
+		if ( !selector ) {
+			return this;
+		}
+
+		// Handle HTML strings
+		if ( typeof selector === "string" ) {
+			if ( selector[0] === "<" && selector[ selector.length - 1 ] === ">" && selector.length >= 3 ) {
+				// Assume that strings that start and end with <> are HTML and skip the regex check
+				match = [ null, selector, null ];
+
+			} else {
+				match = rquickExpr.exec( selector );
+			}
+
+			// Match html or make sure no context is specified for #id
+			if ( match && (match[1] || !context) ) {
+
+				// HANDLE: $(html) -> $(array)
+				if ( match[1] ) {
+					context = context instanceof jQuery ? context[0] : context;
+
+					// Option to run scripts is true for back-compat
+					// Intentionally let the error be thrown if parseHTML is not present
+					jQuery.merge( this, jQuery.parseHTML(
+						match[1],
+						context && context.nodeType ? context.ownerDocument || context : document,
+						true
+					) );
+
+					// HANDLE: $(html, props)
+					if ( rsingleTag.test( match[1] ) && jQuery.isPlainObject( context ) ) {
+						for ( match in context ) {
+							// Properties of context are called as methods if possible
+							if ( jQuery.isFunction( this[ match ] ) ) {
+								this[ match ]( context[ match ] );
+
+							// ...and otherwise set as attributes
+							} else {
+								this.attr( match, context[ match ] );
+							}
+						}
+					}
+
+					return this;
+
+				// HANDLE: $(#id)
+				} else {
+					elem = document.getElementById( match[2] );
+
+					// Support: Blackberry 4.6
+					// gEBID returns nodes no longer in the document (#6963)
+					if ( elem && elem.parentNode ) {
+						// Inject the element directly into the jQuery object
+						this.length = 1;
+						this[0] = elem;
+					}
+
+					this.context = document;
+					this.selector = selector;
+					return this;
+				}
+
+			// HANDLE: $(expr, $(...))
+			} else if ( !context || context.jquery ) {
+				return ( context || rootjQuery ).find( selector );
+
+			// HANDLE: $(expr, context)
+			// (which is just equivalent to: $(context).find(expr)
+			} else {
+				return this.constructor( context ).find( selector );
+			}
+
+		// HANDLE: $(DOMElement)
+		} else if ( selector.nodeType ) {
+			this.context = this[0] = selector;
+			this.length = 1;
+			return this;
+
+		// HANDLE: $(function)
+		// Shortcut for document ready
+		} else if ( jQuery.isFunction( selector ) ) {
+			return typeof rootjQuery.ready !== "undefined" ?
+				rootjQuery.ready( selector ) :
+				// Execute immediately if ready is not present
+				selector( jQuery );
+		}
+
+		if ( selector.selector !== undefined ) {
+			this.selector = selector.selector;
+			this.context = selector.context;
+		}
+
+		return jQuery.makeArray( selector, this );
+	};
+
+// Give the init function the jQuery prototype for later instantiation
+init.prototype = jQuery.fn;
+
+// Initialize central reference
+rootjQuery = jQuery( document );
+
+
+var rparentsprev = /^(?:parents|prev(?:Until|All))/,
+	// Methods guaranteed to produce a unique set when starting from a unique set
+	guaranteedUnique = {
+		children: true,
+		contents: true,
+		next: true,
+		prev: true
+	};
+
+jQuery.extend({
+	dir: function( elem, dir, until ) {
+		var matched = [],
+			truncate = until !== undefined;
+
+		while ( (elem = elem[ dir ]) && elem.nodeType !== 9 ) {
+			if ( elem.nodeType === 1 ) {
+				if ( truncate && jQuery( elem ).is( until ) ) {
+					break;
+				}
+				matched.push( elem );
+			}
+		}
+		return matched;
+	},
+
+	sibling: function( n, elem ) {
+		var matched = [];
+
+		for ( ; n; n = n.nextSibling ) {
+			if ( n.nodeType === 1 && n !== elem ) {
+				matched.push( n );
+			}
+		}
+
+		return matched;
+	}
+});
+
+jQuery.fn.extend({
+	has: function( target ) {
+		var targets = jQuery( target, this ),
+			l = targets.length;
+
+		return this.filter(function() {
+			var i = 0;
+			for ( ; i < l; i++ ) {
+				if ( jQuery.contains( this, targets[i] ) ) {
+					return true;
+				}
+			}
+		});
+	},
+
+	closest: function( selectors, context ) {
+		var cur,
+			i = 0,
+			l = this.length,
+			matched = [],
+			pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
+				jQuery( selectors, context || this.context ) :
+				0;
+
+		for ( ; i < l; i++ ) {
+			for ( cur = this[i]; cur && cur !== context; cur = cur.parentNode ) {
+				// Always skip document fragments
+				if ( cur.nodeType < 11 && (pos ?
+					pos.index(cur) > -1 :
+
+					// Don't pass non-elements to Sizzle
+					cur.nodeType === 1 &&
+						jQuery.find.matchesSelector(cur, selectors)) ) {
+
+					matched.push( cur );
+					break;
+				}
+			}
+		}
+
+		return this.pushStack( matched.length > 1 ? jQuery.unique( matched ) : matched );
+	},
+
+	// Determine the position of an element within the set
+	index: function( elem ) {
+
+		// No argument, return index in parent
+		if ( !elem ) {
+			return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
+		}
+
+		// Index in selector
+		if ( typeof elem === "string" ) {
+			return indexOf.call( jQuery( elem ), this[ 0 ] );
+		}
+
+		// Locate the position of the desired element
+		return indexOf.call( this,
+
+			// If it receives a jQuery object, the first element is used
+			elem.jquery ? elem[ 0 ] : elem
+		);
+	},
+
+	add: function( selector, context ) {
+		return this.pushStack(
+			jQuery.unique(
+				jQuery.merge( this.get(), jQuery( selector, context ) )
+			)
+		);
+	},
+
+	addBack: function( selector ) {
+		return this.add( selector == null ?
+			this.prevObject : this.prevObject.filter(selector)
+		);
+	}
+});
+
+function sibling( cur, dir ) {
+	while ( (cur = cur[dir]) && cur.nodeType !== 1 ) {}
+	return cur;
+}
+
+jQuery.each({
+	parent: function( elem ) {
+		var parent = elem.parentNode;
+		return parent && parent.nodeType !== 11 ? parent : null;
+	},
+	parents: function( elem ) {
+		return jQuery.dir( elem, "parentNode" );
+	},
+	parentsUntil: function( elem, i, until ) {
+		return jQuery.dir( elem, "parentNode", until );
+	},
+	next: function( elem ) {
+		return sibling( elem, "nextSibling" );
+	},
+	prev: function( elem ) {
+		return sibling( elem, "previousSibling" );
+	},
+	nextAll: function( elem ) {
+		return jQuery.dir( elem, "nextSibling" );
+	},
+	prevAll: function( elem ) {
+		return jQuery.dir( elem, "previousSibling" );
+	},
+	nextUntil: function( elem, i, until ) {
+		return jQuery.dir( elem, "nextSibling", until );
+	},
+	prevUntil: function( elem, i, until ) {
+		return jQuery.dir( elem, "previousSibling", until );
+	},
+	siblings: function( elem ) {
+		return jQuery.sibling( ( elem.parentNode || {} ).firstChild, elem );
+	},
+	children: function( elem ) {
+		return jQuery.sibling( elem.firstChild );
+	},
+	contents: function( elem ) {
+		return elem.contentDocument || jQuery.merge( [], elem.childNodes );
+	}
+}, function( name, fn ) {
+	jQuery.fn[ name ] = function( until, selector ) {
+		var matched = jQuery.map( this, fn, until );
+
+		if ( name.slice( -5 ) !== "Until" ) {
+			selector = until;
+		}
+
+		if ( selector && typeof selector === "string" ) {
+			matched = jQuery.filter( selector, matched );
+		}
+
+		if ( this.length > 1 ) {
+			// Remove duplicates
+			if ( !guaranteedUnique[ name ] ) {
+				jQuery.unique( matched );
+			}
+
+			// Reverse order for parents* and prev-derivatives
+			if ( rparentsprev.test( name ) ) {
+				matched.reverse();
+			}
+		}
+
+		return this.pushStack( matched );
+	};
+});
+var rnotwhite = (/\S+/g);
+
+
+
+// String to Object options format cache
+var optionsCache = {};
+
+// Convert String-formatted options into Object-formatted ones and store in cache
+function createOptions( options ) {
+	var object = optionsCache[ options ] = {};
+	jQuery.each( options.match( rnotwhite ) || [], function( _, flag ) {
+		object[ flag ] = true;
+	});
+	return object;
+}
+
+/*
+ * Create a callback list using the following parameters:
+ *
+ *	options: an optional list of space-separated options that will change how
+ *			the callback list behaves or a more traditional option object
+ *
+ * By default a callback list will act like an event callback list and can be
+ * "fired" multiple times.
+ *
+ * Possible options:
+ *
+ *	once:			will ensure the callback list can only be fired once (like a Deferred)
+ *
+ *	memory:			will keep track of previous values and will call any callback added
+ *					after the list has been fired right away with the latest "memorized"
+ *					values (like a Deferred)
+ *
+ *	unique:			will ensure a callback can only be added once (no duplicate in the list)
+ *
+ *	stopOnFalse:	interrupt callings when a callback returns false
+ *
+ */
+jQuery.Callbacks = function( options ) {
+
+	// Convert options from String-formatted to Object-formatted if needed
+	// (we check in cache first)
+	options = typeof options === "string" ?
+		( optionsCache[ options ] || createOptions( options ) ) :
+		jQuery.extend( {}, options );
+
+	var // Last fire value (for non-forgettable lists)
+		memory,
+		// Flag to know if list was already fired
+		fired,
+		// Flag to know if list is currently firing
+		firing,
+		// First callback to fire (used internally by add and fireWith)
+		firingStart,
+		// End of the loop when firing
+		firingLength,
+		// Index of currently firing callback (modified by remove if needed)
+		firingIndex,
+		// Actual callback list
+		list = [],
+		// Stack of fire calls for repeatable lists
+		stack = !options.once && [],
+		// Fire callbacks
+		fire = function( data ) {
+			memory = options.memory && data;
+			fired = true;
+			firingIndex = firingStart || 0;
+			firingStart = 0;
+			firingLength = list.length;
+			firing = true;
+			for ( ; list && firingIndex < firingLength; firingIndex++ ) {
+				if ( list[ firingIndex ].apply( data[ 0 ], data[ 1 ] ) === false && options.stopOnFalse ) {
+					memory = false; // To prevent further calls using add
+					break;
+				}
+			}
+			firing = false;
+			if ( list ) {
+				if ( stack ) {
+					if ( stack.length ) {
+						fire( stack.shift() );
+					}
+				} else if ( memory ) {
+					list = [];
+				} else {
+					self.disable();
+				}
+			}
+		},
+		// Actual Callbacks object
+		self = {
+			// Add a callback or a collection of callbacks to the list
+			add: function() {
+				if ( list ) {
+					// First, we save the current length
+					var start = list.length;
+					(function add( args ) {
+						jQuery.each( args, function( _, arg ) {
+							var type = jQuery.type( arg );
+							if ( type === "function" ) {
+								if ( !options.unique || !self.has( arg ) ) {
+									list.push( arg );
+								}
+							} else if ( arg && arg.length && type !== "string" ) {
+								// Inspect recursively
+								add( arg );
+							}
+						});
+					})( arguments );
+					// Do we need to add the callbacks to the
+					// current firing batch?
+					if ( firing ) {
+						firingLength = list.length;
+					// With memory, if we're not firing then
+					// we should call right away
+					} else if ( memory ) {
+						firingStart = start;
+						fire( memory );
+					}
+				}
+				return this;
+			},
+			// Remove a callback from the list
+			remove: function() {
+				if ( list ) {
+					jQuery.each( arguments, function( _, arg ) {
+						var index;
+						while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
+							list.splice( index, 1 );
+							// Handle firing indexes
+							if ( firing ) {
+								if ( index <= firingLength ) {
+									firingLength--;
+								}
+								if ( index <= firingIndex ) {
+									firingIndex--;
+								}
+							}
+						}
+					});
+				}
+				return this;
+			},
+			// Check if a given callback is in the list.
+			// If no argument is given, return whether or not list has callbacks attached.
+			has: function( fn ) {
+				return fn ? jQuery.inArray( fn, list ) > -1 : !!( list && list.length );
+			},
+			// Remove all callbacks from the list
+			empty: function() {
+				list = [];
+				firingLength = 0;
+				return this;
+			},
+			// Have the list do nothing anymore
+			disable: function() {
+				list = stack = memory = undefined;
+				return this;
+			},
+			// Is it disabled?
+			disabled: function() {
+				return !list;
+			},
+			// Lock the list in its current state
+			lock: function() {
+				stack = undefined;
+				if ( !memory ) {
+					self.disable();
+				}
+				return this;
+			},
+			// Is it locked?
+			locked: function() {
+				return !stack;
+			},
+			// Call all callbacks with the given context and arguments
+			fireWith: function( context, args ) {
+				if ( list && ( !fired || stack ) ) {
+					args = args || [];
+					args = [ context, args.slice ? args.slice() : args ];
+					if ( firing ) {
+						stack.push( args );
+					} else {
+						fire( args );
+					}
+				}
+				return this;
+			},
+			// Call all the callbacks with the given arguments
+			fire: function() {
+				self.fireWith( this, arguments );
+				return this;
+			},
+			// To know if the callbacks have already been called at least once
+			fired: function() {
+				return !!fired;
+			}
+		};
+
+	return self;
+};
+
+
+jQuery.extend({
+
+	Deferred: function( func ) {
+		var tuples = [
+				// action, add listener, listener list, final state
+				[ "resolve", "done", jQuery.Callbacks("once memory"), "resolved" ],
+				[ "reject", "fail", jQuery.Callbacks("once memory"), "rejected" ],
+				[ "notify", "progress", jQuery.Callbacks("memory") ]
+			],
+			state = "pending",
+			promise = {
+				state: function() {
+					return state;
+				},
+				always: function() {
+					deferred.done( arguments ).fail( arguments );
+					return this;
+				},
+				then: function( /* fnDone, fnFail, fnProgress */ ) {
+					var fns = arguments;
+					return jQuery.Deferred(function( newDefer ) {
+						jQuery.each( tuples, function( i, tuple ) {
+							var fn = jQuery.isFunction( fns[ i ] ) && fns[ i ];
+							// deferred[ done | fail | progress ] for forwarding actions to newDefer
+							deferred[ tuple[1] ](function() {
+								var returned = fn && fn.apply( this, arguments );
+								if ( returned && jQuery.isFunction( returned.promise ) ) {
+									returned.promise()
+										.done( newDefer.resolve )
+										.fail( newDefer.reject )
+										.progress( newDefer.notify );
+								} else {
+									newDefer[ tuple[ 0 ] + "With" ]( this === promise ? newDefer.promise() : this, fn ? [ returned ] : arguments );
+								}
+							});
+						});
+						fns = null;
+					}).promise();
+				},
+				// Get a promise for this deferred
+				// If obj is provided, the promise aspect is added to the object
+				promise: function( obj ) {
+					return obj != null ? jQuery.extend( obj, promise ) : promise;
+				}
+			},
+			deferred = {};
+
+		// Keep pipe for back-compat
+		promise.pipe = promise.then;
+
+		// Add list-specific methods
+		jQuery.each( tuples, function( i, tuple ) {
+			var list = tuple[ 2 ],
+				stateString = tuple[ 3 ];
+
+			// promise[ done | fail | progress ] = list.add
+			promise[ tuple[1] ] = list.add;
+
+			// Handle state
+			if ( stateString ) {
+				list.add(function() {
+					// state = [ resolved | rejected ]
+					state = stateString;
+
+				// [ reject_list | resolve_list ].disable; progress_list.lock
+				}, tuples[ i ^ 1 ][ 2 ].disable, tuples[ 2 ][ 2 ].lock );
+			}
+
+			// deferred[ resolve | reject | notify ]
+			deferred[ tuple[0] ] = function() {
+				deferred[ tuple[0] + "With" ]( this === deferred ? promise : this, arguments );
+				return this;
+			};
+			deferred[ tuple[0] + "With" ] = list.fireWith;
+		});
+
+		// Make the deferred a promise
+		promise.promise( deferred );
+
+		// Call given func if any
+		if ( func ) {
+			func.call( deferred, deferred );
+		}
+
+		// All done!
+		return deferred;
+	},
+
+	// Deferred helper
+	when: function( subordinate /* , ..., subordinateN */ ) {
+		var i = 0,
+			resolveValues = slice.call( arguments ),
+			length = resolveValues.length,
+
+			// the count of uncompleted subordinates
+			remaining = length !== 1 || ( subordinate && jQuery.isFunction( subordinate.promise ) ) ? length : 0,
+
+			// the master Deferred. If resolveValues consist of only a single Deferred, just use that.
+			deferred = remaining === 1 ? subordinate : jQuery.Deferred(),
+
+			// Update function for both resolve and progress values
+			updateFunc = function( i, contexts, values ) {
+				return function( value ) {
+					contexts[ i ] = this;
+					values[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
+					if ( values === progressValues ) {
+						deferred.notifyWith( contexts, values );
+					} else if ( !( --remaining ) ) {
+						deferred.resolveWith( contexts, values );
+					}
+				};
+			},
+
+			progressValues, progressContexts, resolveContexts;
+
+		// Add listeners to Deferred subordinates; treat others as resolved
+		if ( length > 1 ) {
+			progressValues = new Array( length );
+			progressContexts = new Array( length );
+			resolveContexts = new Array( length );
+			for ( ; i < length; i++ ) {
+				if ( resolveValues[ i ] && jQuery.isFunction( resolveValues[ i ].promise ) ) {
+					resolveValues[ i ].promise()
+						.done( updateFunc( i, resolveContexts, resolveValues ) )
+						.fail( deferred.reject )
+						.progress( updateFunc( i, progressContexts, progressValues ) );
+				} else {
+					--remaining;
+				}
+			}
+		}
+
+		// If we're not waiting on anything, resolve the master
+		if ( !remaining ) {
+			deferred.resolveWith( resolveContexts, resolveValues );
+		}
+
+		return deferred.promise();
+	}
+});
+
+
+// The deferred used on DOM ready
+var readyList;
+
+jQuery.fn.ready = function( fn ) {
+	// Add the callback
+	jQuery.ready.promise().done( fn );
+
+	return this;
+};
+
+jQuery.extend({
+	// Is the DOM ready to be used? Set to true once it occurs.
+	isReady: false,
+
+	// A counter to track how many items to wait for before
+	// the ready event fires. See #6781
+	readyWait: 1,
+
+	// Hold (or release) the ready event
+	holdReady: function( hold ) {
+		if ( hold ) {
+			jQuery.readyWait++;
+		} else {
+			jQuery.ready( true );
+		}
+	},
+
+	// Handle when the DOM is ready
+	ready: function( wait ) {
+
+		// Abort if there are pending holds or we're already ready
+		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
+			return;
+		}
+
+		// Remember that the DOM is ready
+		jQuery.isReady = true;
+
+		// If a normal DOM Ready event fired, decrement, and wait if need be
+		if ( wait !== true && --jQuery.readyWait > 0 ) {
+			return;
+		}
+
+		// If there are functions bound, to execute
+		readyList.resolveWith( document, [ jQuery ] );
+
+		// Trigger any bound ready events
+		if ( jQuery.fn.triggerHandler ) {
+			jQuery( document ).triggerHandler( "ready" );
+			jQuery( document ).off( "ready" );
+		}
+	}
+});
+
+/**
+ * The ready event handler and self cleanup method
+ */
+function completed() {
+	document.removeEventListener( "DOMContentLoaded", completed, false );
+	window.removeEventListener( "load", completed, false );
+	jQuery.ready();
+}
+
+jQuery.ready.promise = function( obj ) {
+	if ( !readyList ) {
+
+		readyList = jQuery.Deferred();
+
+		// Catch cases where $(document).ready() is called after the browser event has already occurred.
+		// We once tried to use readyState "interactive" here, but it caused issues like the one
+		// discovered by ChrisS here: http://bugs.jquery.com/ticket/12282#comment:15
+		if ( document.readyState === "complete" ) {
+			// Handle it asynchronously to allow scripts the opportunity to delay ready
+			setTimeout( jQuery.ready );
+
+		} else {
+
+			// Use the handy event callback
+			document.addEventListener( "DOMContentLoaded", completed, false );
+
+			// A fallback to window.onload, that will always work
+			window.addEventListener( "load", completed, false );
+		}
+	}
+	return readyList.promise( obj );
+};
+
+// Kick off the DOM ready check even if the user does not
+jQuery.ready.promise();
+
+
+
+
+// Multifunctional method to get and set values of a collection
+// The value/s can optionally be executed if it's a function
+var access = jQuery.access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
+	var i = 0,
+		len = elems.length,
+		bulk = key == null;
+
+	// Sets many values
+	if ( jQuery.type( key ) === "object" ) {
+		chainable = true;
+		for ( i in key ) {
+			jQuery.access( elems, fn, i, key[i], true, emptyGet, raw );
+		}
+
+	// Sets one value
+	} else if ( value !== undefined ) {
+		chainable = true;
+
+		if ( !jQuery.isFunction( value ) ) {
+			raw = true;
+		}
+
+		if ( bulk ) {
+			// Bulk operations run against the entire set
+			if ( raw ) {
+				fn.call( elems, value );
+				fn = null;
+
+			// ...except when executing function values
+			} else {
+				bulk = fn;
+				fn = function( elem, key, value ) {
+					return bulk.call( jQuery( elem ), value );
+				};
+			}
+		}
+
+		if ( fn ) {
+			for ( ; i < len; i++ ) {
+				fn( elems[i], key, raw ? value : value.call( elems[i], i, fn( elems[i], key ) ) );
+			}
+		}
+	}
+
+	return chainable ?
+		elems :
+
+		// Gets
+		bulk ?
+			fn.call( elems ) :
+			len ? fn( elems[0], key ) : emptyGet;
+};
+
+
+/**
+ * Determines whether an object can have data
+ */
+jQuery.acceptData = function( owner ) {
+	// Accepts only:
+	//  - Node
+	//    - Node.ELEMENT_NODE
+	//    - Node.DOCUMENT_NODE
+	//  - Object
+	//    - Any
+	/* jshint -W018 */
+	return owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );
+};
+
+
+function Data() {
+	// Support: Android<4,
+	// Old WebKit does not have Object.preventExtensions/freeze method,
+	// return new empty object instead with no [[set]] accessor
+	Object.defineProperty( this.cache = {}, 0, {
+		get: function() {
+			return {};
+		}
+	});
+
+	this.expando = jQuery.expando + Data.uid++;
+}
+
+Data.uid = 1;
+Data.accepts = jQuery.acceptData;
+
+Data.prototype = {
+	key: function( owner ) {
+		// We can accept data for non-element nodes in modern browsers,
+		// but we should not, see #8335.
+		// Always return the key for a frozen object.
+		if ( !Data.accepts( owner ) ) {
+			return 0;
+		}
+
+		var descriptor = {},
+			// Check if the owner object already has a cache key
+			unlock = owner[ this.expando ];
+
+		// If not, create one
+		if ( !unlock ) {
+			unlock = Data.uid++;
+
+			// Secure it in a non-enumerable, non-writable property
+			try {
+				descriptor[ this.expando ] = { value: unlock };
+				Object.defineProperties( owner, descriptor );
+
+			// Support: Android<4
+			// Fallback to a less secure definition
+			} catch ( e ) {
+				descriptor[ this.expando ] = unlock;
+				jQuery.extend( owner, descriptor );
+			}
+		}
+
+		// Ensure the cache object
+		if ( !this.cache[ unlock ] ) {
+			this.cache[ unlock ] = {};
+		}
+
+		return unlock;
+	},
+	set: function( owner, data, value ) {
+		var prop,
+			// There may be an unlock assigned to this node,
+			// if there is no entry for this "owner", create one inline
+			// and set the unlock as though an owner entry had always existed
+			unlock = this.key( owner ),
+			cache = this.cache[ unlock ];
+
+		// Handle: [ owner, key, value ] args
+		if ( typeof data === "string" ) {
+			cache[ data ] = value;
+
+		// Handle: [ owner, { properties } ] args
+		} else {
+			// Fresh assignments by object are shallow copied
+			if ( jQuery.isEmptyObject( cache ) ) {
+				jQuery.extend( this.cache[ unlock ], data );
+			// Otherwise, copy the properties one-by-one to the cache object
+			} else {
+				for ( prop in data ) {
+					cache[ prop ] = data[ prop ];
+				}
+			}
+		}
+		return cache;
+	},
+	get: function( owner, key ) {
+		// Either a valid cache is found, or will be created.
+		// New caches will be created and the unlock returned,
+		// allowing direct access to the newly created
+		// empty data object. A valid owner object must be provided.
+		var cache = this.cache[ this.key( owner ) ];
+
+		return key === undefined ?
+			cache : cache[ key ];
+	},
+	access: function( owner, key, value ) {
+		var stored;
+		// In cases where either:
+		//
+		//   1. No key was specified
+		//   2. A string key was specified, but no value provided
+		//
+		// Take the "read" path and allow the get method to determine
+		// which value to return, respectively either:
+		//
+		//   1. The entire cache object
+		//   2. The data stored at the key
+		//
+		if ( key === undefined ||
+				((key && typeof key === "string") && value === undefined) ) {
+
+			stored = this.get( owner, key );
+
+			return stored !== undefined ?
+				stored : this.get( owner, jQuery.camelCase(key) );
+		}
+
+		// [*]When the key is not a string, or both a key and value
+		// are specified, set or extend (existing objects) with either:
+		//
+		//   1. An object of properties
+		//   2. A key and value
+		//
+		this.set( owner, key, value );
+
+		// Since the "set" path can have two possible entry points
+		// return the expected data based on which path was taken[*]
+		return value !== undefined ? value : key;
+	},
+	remove: function( owner, key ) {
+		var i, name, camel,
+			unlock = this.key( owner ),
+			cache = this.cache[ unlock ];
+
+		if ( key === undefined ) {
+			this.cache[ unlock ] = {};
+
+		} else {
+			// Support array or space separated string of keys
+			if ( jQuery.isArray( key ) ) {
+				// If "name" is an array of keys...
+				// When data is initially created, via ("key", "val") signature,
+				// keys will be converted to camelCase.
+				// Since there is no way to tell _how_ a key was added, remove
+				// both plain key and camelCase key. #12786
+				// This will only penalize the array argument path.
+				name = key.concat( key.map( jQuery.camelCase ) );
+			} else {
+				camel = jQuery.camelCase( key );
+				// Try the string as a key before any manipulation
+				if ( key in cache ) {
+					name = [ key, camel ];
+				} else {
+					// If a key with the spaces exists, use it.
+					// Otherwise, create an array by matching non-whitespace
+					name = camel;
+					name = name in cache ?
+						[ name ] : ( name.match( rnotwhite ) || [] );
+				}
+			}
+
+			i = name.length;
+			while ( i-- ) {
+				delete cache[ name[ i ] ];
+			}
+		}
+	},
+	hasData: function( owner ) {
+		return !jQuery.isEmptyObject(
+			this.cache[ owner[ this.expando ] ] || {}
+		);
+	},
+	discard: function( owner ) {
+		if ( owner[ this.expando ] ) {
+			delete this.cache[ owner[ this.expando ] ];
+		}
+	}
+};
+var data_priv = new Data();
+
+var data_user = new Data();
+
+
+
+//	Implementation Summary
+//
+//	1. Enforce API surface and semantic compatibility with 1.9.x branch
+//	2. Improve the module's maintainability by reducing the storage
+//		paths to a single mechanism.
+//	3. Use the same single mechanism to support "private" and "user" data.
+//	4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
+//	5. Avoid exposing implementation details on user objects (eg. expando properties)
+//	6. Provide a clear path for implementation upgrade to WeakMap in 2014
+
+var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
+	rmultiDash = /([A-Z])/g;
+
+function dataAttr( elem, key, data ) {
+	var name;
+
+	// If nothing was found internally, try to fetch any
+	// data from the HTML5 data-* attribute
+	if ( data === undefined && elem.nodeType === 1 ) {
+		name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();
+		data = elem.getAttribute( name );
+
+		if ( typeof data === "string" ) {
+			try {
+				data = data === "true" ? true :
+					data === "false" ? false :
+					data === "null" ? null :
+					// Only convert to a number if it doesn't change the string
+					+data + "" === data ? +data :
+					rbrace.test( data ) ? jQuery.parseJSON( data ) :
+					data;
+			} catch( e ) {}
+
+			// Make sure we set the data so it isn't changed later
+			data_user.set( elem, key, data );
+		} else {
+			data = undefined;
+		}
+	}
+	return data;
+}
+
+jQuery.extend({
+	hasData: function( elem ) {
+		return data_user.hasData( elem ) || data_priv.hasData( elem );
+	},
+
+	data: function( elem, name, data ) {
+		return data_user.access( elem, name, data );
+	},
+
+	removeData: function( elem, name ) {
+		data_user.remove( elem, name );
+	},
+
+	// TODO: Now that all calls to _data and _removeData have been replaced
+	// with direct calls to data_priv methods, these can be deprecated.
+	_data: function( elem, name, data ) {
+		return data_priv.access( elem, name, data );
+	},
+
+	_removeData: function( elem, name ) {
+		data_priv.remove( elem, name );
+	}
+});
+
+jQuery.fn.extend({
+	data: function( key, value ) {
+		var i, name, data,
+			elem = this[ 0 ],
+			attrs = elem && elem.attributes;
+
+		// Gets all values
+		if ( key === undefined ) {
+			if ( this.length ) {
+				data = data_user.get( elem );
+
+				if ( elem.nodeType === 1 && !data_priv.get( elem, "hasDataAttrs" ) ) {
+					i = attrs.length;
+					while ( i-- ) {
+
+						// Support: IE11+
+						// The attrs elements can be null (#14894)
+						if ( attrs[ i ] ) {
+							name = attrs[ i ].name;
+							if ( name.indexOf( "data-" ) === 0 ) {
+								name = jQuery.camelCase( name.slice(5) );
+								dataAttr( elem, name, data[ name ] );
+							}
+						}
+					}
+					data_priv.set( elem, "hasDataAttrs", true );
+				}
+			}
+
+			return data;
+		}
+
+		// Sets multiple values
+		if ( typeof key === "object" ) {
+			return this.each(function() {
+				data_user.set( this, key );
+			});
+		}
+
+		return access( this, function( value ) {
+			var data,
+				camelKey = jQuery.camelCase( key );
+
+			// The calling jQuery object (element matches) is not empty
+			// (and therefore has an element appears at this[ 0 ]) and the
+			// `value` parameter was not undefined. An empty jQuery object
+			// will result in `undefined` for elem = this[ 0 ] which will
+			// throw an exception if an attempt to read a data cache is made.
+			if ( elem && value === undefined ) {
+				// Attempt to get data from the cache
+				// with the key as-is
+				data = data_user.get( elem, key );
+				if ( data !== undefined ) {
+					return data;
+				}
+
+				// Attempt to get data from the cache
+				// with the key camelized
+				data = data_user.get( elem, camelKey );
+				if ( data !== undefined ) {
+					return data;
+				}
+
+				// Attempt to "discover" the data in
+				// HTML5 custom data-* attrs
+				data = dataAttr( elem, camelKey, undefined );
+				if ( data !== undefined ) {
+					return data;
+				}
+
+				// We tried really hard, but the data doesn't exist.
+				return;
+			}
+
+			// Set the data...
+			this.each(function() {
+				// First, attempt to store a copy or reference of any
+				// data that might've been store with a camelCased key.
+				var data = data_user.get( this, camelKey );
+
+				// For HTML5 data-* attribute interop, we have to
+				// store property names with dashes in a camelCase form.
+				// This might not apply to all properties...*
+				data_user.set( this, camelKey, value );
+
+				// *... In the case of properties that might _actually_
+				// have dashes, we need to also store a copy of that
+				// unchanged property.
+				if ( key.indexOf("-") !== -1 && data !== undefined ) {
+					data_user.set( this, key, value );
+				}
+			});
+		}, null, value, arguments.length > 1, null, true );
+	},
+
+	removeData: function( key ) {
+		return this.each(function() {
+			data_user.remove( this, key );
+		});
+	}
+});
+
+
+jQuery.extend({
+	queue: function( elem, type, data ) {
+		var queue;
+
+		if ( elem ) {
+			type = ( type || "fx" ) + "queue";
+			queue = data_priv.get( elem, type );
+
+			// Speed up dequeue by getting out quickly if this is just a lookup
+			if ( data ) {
+				if ( !queue || jQuery.isArray( data ) ) {
+					queue = data_priv.access( elem, type, jQuery.makeArray(data) );
+				} else {
+					queue.push( data );
+				}
+			}
+			return queue || [];
+		}
+	},
+
+	dequeue: function( elem, type ) {
+		type = type || "fx";
+
+		var queue = jQuery.queue( elem, type ),
+			startLength = queue.length,
+			fn = queue.shift(),
+			hooks = jQuery._queueHooks( elem, type ),
+			next = function() {
+				jQuery.dequeue( elem, type );
+			};
+
+		// If the fx queue is dequeued, always remove the progress sentinel
+		if ( fn === "inprogress" ) {
+			fn = queue.shift();
+			startLength--;
+		}
+
+		if ( fn ) {
+
+			// Add a progress sentinel to prevent the fx queue from being
+			// automatically dequeued
+			if ( type === "fx" ) {
+				queue.unshift( "inprogress" );
+			}
+
+			// Clear up the last queue stop function
+			delete hooks.stop;
+			fn.call( elem, next, hooks );
+		}
+
+		if ( !startLength && hooks ) {
+			hooks.empty.fire();
+		}
+	},
+
+	// Not public - generate a queueHooks object, or return the current one
+	_queueHooks: function( elem, type ) {
+		var key = type + "queueHooks";
+		return data_priv.get( elem, key ) || data_priv.access( elem, key, {
+			empty: jQuery.Callbacks("once memory").add(function() {
+				data_priv.remove( elem, [ type + "queue", key ] );
+			})
+		});
+	}
+});
+
+jQuery.fn.extend({
+	queue: function( type, data ) {
+		var setter = 2;
+
+		if ( typeof type !== "string" ) {
+			data = type;
+			type = "fx";
+			setter--;
+		}
+
+		if ( arguments.length < setter ) {
+			return jQuery.queue( this[0], type );
+		}
+
+		return data === undefined ?
+			this :
+			this.each(function() {
+				var queue = jQuery.queue( this, type, data );
+
+				// Ensure a hooks for this queue
+				jQuery._queueHooks( this, type );
+
+				if ( type === "fx" && queue[0] !== "inprogress" ) {
+					jQuery.dequeue( this, type );
+				}
+			});
+	},
+	dequeue: function( type ) {
+		return this.each(function() {
+			jQuery.dequeue( this, type );
+		});
+	},
+	clearQueue: function( type ) {
+		return this.queue( type || "fx", [] );
+	},
+	// Get a promise resolved when queues of a certain type
+	// are emptied (fx is the type by default)
+	promise: function( type, obj ) {
+		var tmp,
+			count = 1,
+			defer = jQuery.Deferred(),
+			elements = this,
+			i = this.length,
+			resolve = function() {
+				if ( !( --count ) ) {
+					defer.resolveWith( elements, [ elements ] );
+				}
+			};
+
+		if ( typeof type !== "string" ) {
+			obj = type;
+			type = undefined;
+		}
+		type = type || "fx";
+
+		while ( i-- ) {
+			tmp = data_priv.get( elements[ i ], type + "queueHooks" );
+			if ( tmp && tmp.empty ) {
+				count++;
+				tmp.empty.add( resolve );
+			}
+		}
+		resolve();
+		return defer.promise( obj );
+	}
+});
+var pnum = (/[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/).source;
+
+var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
+
+var isHidden = function( elem, el ) {
+		// isHidden might be called from jQuery#filter function;
+		// in that case, element will be second argument
+		elem = el || elem;
+		return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument, elem );
+	};
+
+var rcheckableType = (/^(?:checkbox|radio)$/i);
+
+
+
+(function() {
+	var fragment = document.createDocumentFragment(),
+		div = fragment.appendChild( document.createElement( "div" ) ),
+		input = document.createElement( "input" );
+
+	// Support: Safari<=5.1
+	// Check state lost if the name is set (#11217)
+	// Support: Windows Web Apps (WWA)
+	// `name` and `type` must use .setAttribute for WWA (#14901)
+	input.setAttribute( "type", "radio" );
+	input.setAttribute( "checked", "checked" );
+	input.setAttribute( "name", "t" );
+
+	div.appendChild( input );
+
+	// Support: Safari<=5.1, Android<4.2
+	// Older WebKit doesn't clone checked state correctly in fragments
+	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
+
+	// Support: IE<=11+
+	// Make sure textarea (and checkbox) defaultValue is properly cloned
+	div.innerHTML = "<textarea>x</textarea>";
+	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
+})();
+var strundefined = typeof undefined;
+
+
+
+support.focusinBubbles = "onfocusin" in window;
+
+
+var
+	rkeyEvent = /^key/,
+	rmouseEvent = /^(?:mouse|pointer|contextmenu)|click/,
+	rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
+	rtypenamespace = /^([^.]*)(?:\.(.+)|)$/;
+
+function returnTrue() {
+	return true;
+}
+
+function returnFalse() {
+	return false;
+}
+
+function safeActiveElement() {
+	try {
+		return document.activeElement;
+	} catch ( err ) { }
+}
+
+/*
+ * Helper functions for managing events -- not part of the public interface.
+ * Props to Dean Edwards' addEvent library for many of the ideas.
+ */
+jQuery.event = {
+
+	global: {},
+
+	add: function( elem, types, handler, data, selector ) {
+
+		var handleObjIn, eventHandle, tmp,
+			events, t, handleObj,
+			special, handlers, type, namespaces, origType,
+			elemData = data_priv.get( elem );
+
+		// Don't attach events to noData or text/comment nodes (but allow plain objects)
+		if ( !elemData ) {
+			return;
+		}
+
+		// Caller can pass in an object of custom data in lieu of the handler
+		if ( handler.handler ) {
+			handleObjIn = handler;
+			handler = handleObjIn.handler;
+			selector = handleObjIn.selector;
+		}
+
+		// Make sure that the handler has a unique ID, used to find/remove it later
+		if ( !handler.guid ) {
+			handler.guid = jQuery.guid++;
+		}
+
+		// Init the element's event structure and main handler, if this is the first
+		if ( !(events = elemData.events) ) {
+			events = elemData.events = {};
+		}
+		if ( !(eventHandle = elemData.handle) ) {
+			eventHandle = elemData.handle = function( e ) {
+				// Discard the second event of a jQuery.event.trigger() and
+				// when an event is called after a page has unloaded
+				return typeof jQuery !== strundefined && jQuery.event.triggered !== e.type ?
+					jQuery.event.dispatch.apply( elem, arguments ) : undefined;
+			};
+		}
+
+		// Handle multiple events separated by a space
+		types = ( types || "" ).match( rnotwhite ) || [ "" ];
+		t = types.length;
+		while ( t-- ) {
+			tmp = rtypenamespace.exec( types[t] ) || [];
+			type = origType = tmp[1];
+			namespaces = ( tmp[2] || "" ).split( "." ).sort();
+
+			// There *must* be a type, no attaching namespace-only handlers
+			if ( !type ) {
+				continue;
+			}
+
+			// If event changes its type, use the special event handlers for the changed type
+			special = jQuery.event.special[ type ] || {};
+
+			// If selector defined, determine special event api type, otherwise given type
+			type = ( selector ? special.delegateType : special.bindType ) || type;
+
+			// Update special based on newly reset type
+			special = jQuery.event.special[ type ] || {};
+
+			// handleObj is passed to all event handlers
+			handleObj = jQuery.extend({
+				type: type,
+				origType: origType,
+				data: data,
+				handler: handler,
+				guid: handler.guid,
+				selector: selector,
+				needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
+				namespace: namespaces.join(".")
+			}, handleObjIn );
+
+			// Init the event handler queue if we're the first
+			if ( !(handlers = events[ type ]) ) {
+				handlers = events[ type ] = [];
+				handlers.delegateCount = 0;
+
+				// Only use addEventListener if the special events handler returns false
+				if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
+					if ( elem.addEventListener ) {
+						elem.addEventListener( type, eventHandle, false );
+					}
+				}
+			}
+
+			if ( special.add ) {
+				special.add.call( elem, handleObj );
+
+				if ( !handleObj.handler.guid ) {
+					handleObj.handler.guid = handler.guid;
+				}
+			}
+
+			// Add to the element's handler list, delegates in front
+			if ( selector ) {
+				handlers.splice( handlers.delegateCount++, 0, handleObj );
+			} else {
+				handlers.push( handleObj );
+			}
+
+			// Keep track of which events have ever been used, for event optimization
+			jQuery.event.global[ type ] = true;
+		}
+
+	},
+
+	// Detach an event or set of events from an element
+	remove: function( elem, types, handler, selector, mappedTypes ) {
+
+		var j, origCount, tmp,
+			events, t, handleObj,
+			special, handlers, type, namespaces, origType,
+			elemData = data_priv.hasData( elem ) && data_priv.get( elem );
+
+		if ( !elemData || !(events = elemData.events) ) {
+			return;
+		}
+
+		// Once for each type.namespace in types; type may be omitted
+		types = ( types || "" ).match( rnotwhite ) || [ "" ];
+		t = types.length;
+		while ( t-- ) {
+			tmp = rtypenamespace.exec( types[t] ) || [];
+			type = origType = tmp[1];
+			namespaces = ( tmp[2] || "" ).split( "." ).sort();
+
+			// Unbind all events (on this namespace, if provided) for the element
+			if ( !type ) {
+				for ( type in events ) {
+					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
+				}
+				continue;
+			}
+
+			special = jQuery.event.special[ type ] || {};
+			type = ( selector ? special.delegateType : special.bindType ) || type;
+			handlers = events[ type ] || [];
+			tmp = tmp[2] && new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" );
+
+			// Remove matching events
+			origCount = j = handlers.length;
+			while ( j-- ) {
+				handleObj = handlers[ j ];
+
+				if ( ( mappedTypes || origType === handleObj.origType ) &&
+					( !handler || handler.guid === handleObj.guid ) &&
+					( !tmp || tmp.test( handleObj.namespace ) ) &&
+					( !selector || selector === handleObj.selector || selector === "**" && handleObj.selector ) ) {
+					handlers.splice( j, 1 );
+
+					if ( handleObj.selector ) {
+						handlers.delegateCount--;
+					}
+					if ( special.remove ) {
+						special.remove.call( elem, handleObj );
+					}
+				}
+			}
+
+			// Remove generic event handler if we removed something and no more handlers exist
+			// (avoids potential for endless recursion during removal of special event handlers)
+			if ( origCount && !handlers.length ) {
+				if ( !special.teardown || special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
+					jQuery.removeEvent( elem, type, elemData.handle );
+				}
+
+				delete events[ type ];
+			}
+		}
+
+		// Remove the expando if it's no longer used
+		if ( jQuery.isEmptyObject( events ) ) {
+			delete elemData.handle;
+			data_priv.remove( elem, "events" );
+		}
+	},
+
+	trigger: function( event, data, elem, onlyHandlers ) {
+
+		var i, cur, tmp, bubbleType, ontype, handle, special,
+			eventPath = [ elem || document ],
+			type = hasOwn.call( event, "type" ) ? event.type : event,
+			namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split(".") : [];
+
+		cur = tmp = elem = elem || document;
+
+		// Don't do events on text and comment nodes
+		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
+			return;
+		}
+
+		// focus/blur morphs to focusin/out; ensure we're not firing them right now
+		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
+			return;
+		}
+
+		if ( type.indexOf(".") >= 0 ) {
+			// Namespaced trigger; create a regexp to match event type in handle()
+			namespaces = type.split(".");
+			type = namespaces.shift();
+			namespaces.sort();
+		}
+		ontype = type.indexOf(":") < 0 && "on" + type;
+
+		// Caller can pass in a jQuery.Event object, Object, or just an event type string
+		event = event[ jQuery.expando ] ?
+			event :
+			new jQuery.Event( type, typeof event === "object" && event );
+
+		// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
+		event.isTrigger = onlyHandlers ? 2 : 3;
+		event.namespace = namespaces.join(".");
+		event.namespace_re = event.namespace ?
+			new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" ) :
+			null;
+
+		// Clean up the event in case it is being reused
+		event.result = undefined;
+		if ( !event.target ) {
+			event.target = elem;
+		}
+
+		// Clone any incoming data and prepend the event, creating the handler arg list
+		data = data == null ?
+			[ event ] :
+			jQuery.makeArray( data, [ event ] );
+
+		// Allow special events to draw outside the lines
+		special = jQuery.event.special[ type ] || {};
+		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
+			return;
+		}
+
+		// Determine event propagation path in advance, per W3C events spec (#9951)
+		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
+		if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {
+
+			bubbleType = special.delegateType || type;
+			if ( !rfocusMorph.test( bubbleType + type ) ) {
+				cur = cur.parentNode;
+			}
+			for ( ; cur; cur = cur.parentNode ) {
+				eventPath.push( cur );
+				tmp = cur;
+			}
+
+			// Only add window if we got to document (e.g., not plain obj or detached DOM)
+			if ( tmp === (elem.ownerDocument || document) ) {
+				eventPath.push( tmp.defaultView || tmp.parentWindow || window );
+			}
+		}
+
+		// Fire handlers on the event path
+		i = 0;
+		while ( (cur = eventPath[i++]) && !event.isPropagationStopped() ) {
+
+			event.type = i > 1 ?
+				bubbleType :
+				special.bindType || type;
+
+			// jQuery handler
+			handle = ( data_priv.get( cur, "events" ) || {} )[ event.type ] && data_priv.get( cur, "handle" );
+			if ( handle ) {
+				handle.apply( cur, data );
+			}
+
+			// Native handler
+			handle = ontype && cur[ ontype ];
+			if ( handle && handle.apply && jQuery.acceptData( cur ) ) {
+				event.result = handle.apply( cur, data );
+				if ( event.result === false ) {
+					event.preventDefault();
+				}
+			}
+		}
+		event.type = type;
+
+		// If nobody prevented the default action, do it now
+		if ( !onlyHandlers && !event.isDefaultPrevented() ) {
+
+			if ( (!special._default || special._default.apply( eventPath.pop(), data ) === false) &&
+				jQuery.acceptData( elem ) ) {
+
+				// Call a native DOM method on the target with the same name name as the event.
+				// Don't do default actions on window, that's where global variables be (#6170)
+				if ( ontype && jQuery.isFunction( elem[ type ] ) && !jQuery.isWindow( elem ) ) {
+
+					// Don't re-trigger an onFOO event when we call its FOO() method
+					tmp = elem[ ontype ];
+
+					if ( tmp ) {
+						elem[ ontype ] = null;
+					}
+
+					// Prevent re-triggering of the same event, since we already bubbled it above
+					jQuery.event.triggered = type;
+					elem[ type ]();
+					jQuery.event.triggered = undefined;
+
+					if ( tmp ) {
+						elem[ ontype ] = tmp;
+					}
+				}
+			}
+		}
+
+		return event.result;
+	},
+
+	dispatch: function( event ) {
+
+		// Make a writable jQuery.Event from the native event object
+		event = jQuery.event.fix( event );
+
+		var i, j, ret, matched, handleObj,
+			handlerQueue = [],
+			args = slice.call( arguments ),
+			handlers = ( data_priv.get( this, "events" ) || {} )[ event.type ] || [],
+			special = jQuery.event.special[ event.type ] || {};
+
+		// Use the fix-ed jQuery.Event rather than the (read-only) native event
+		args[0] = event;
+		event.delegateTarget = this;
+
+		// Call the preDispatch hook for the mapped type, and let it bail if desired
+		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
+			return;
+		}
+
+		// Determine handlers
+		handlerQueue = jQuery.event.handlers.call( this, event, handlers );
+
+		// Run delegates first; they may want to stop propagation beneath us
+		i = 0;
+		while ( (matched = handlerQueue[ i++ ]) && !event.isPropagationStopped() ) {
+			event.currentTarget = matched.elem;
+
+			j = 0;
+			while ( (handleObj = matched.handlers[ j++ ]) && !event.isImmediatePropagationStopped() ) {
+
+				// Triggered event must either 1) have no namespace, or 2) have namespace(s)
+				// a subset or equal to those in the bound event (both can have no namespace).
+				if ( !event.namespace_re || event.namespace_re.test( handleObj.namespace ) ) {
+
+					event.handleObj = handleObj;
+					event.data = handleObj.data;
+
+					ret = ( (jQuery.event.special[ handleObj.origType ] || {}).handle || handleObj.handler )
+							.apply( matched.elem, args );
+
+					if ( ret !== undefined ) {
+						if ( (event.result = ret) === false ) {
+							event.preventDefault();
+							event.stopPropagation();
+						}
+					}
+				}
+			}
+		}
+
+		// Call the postDispatch hook for the mapped type
+		if ( special.postDispatch ) {
+			special.postDispatch.call( this, event );
+		}
+
+		return event.result;
+	},
+
+	handlers: function( event, handlers ) {
+		var i, matches, sel, handleObj,
+			handlerQueue = [],
+			delegateCount = handlers.delegateCount,
+			cur = event.target;
+
+		// Find delegate handlers
+		// Black-hole SVG <use> instance trees (#13180)
+		// Avoid non-left-click bubbling in Firefox (#3861)
+		if ( delegateCount && cur.nodeType && (!event.button || event.type !== "click") ) {
+
+			for ( ; cur !== this; cur = cur.parentNode || this ) {
+
+				// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
+				if ( cur.disabled !== true || event.type !== "click" ) {
+					matches = [];
+					for ( i = 0; i < delegateCount; i++ ) {
+						handleObj = handlers[ i ];
+
+						// Don't conflict with Object.prototype properties (#13203)
+						sel = handleObj.selector + " ";
+
+						if ( matches[ sel ] === undefined ) {
+							matches[ sel ] = handleObj.needsContext ?
+								jQuery( sel, this ).index( cur ) >= 0 :
+								jQuery.find( sel, this, null, [ cur ] ).length;
+						}
+						if ( matches[ sel ] ) {
+							matches.push( handleObj );
+						}
+					}
+					if ( matches.length ) {
+						handlerQueue.push({ elem: cur, handlers: matches });
+					}
+				}
+			}
+		}
+
+		// Add the remaining (directly-bound) handlers
+		if ( delegateCount < handlers.length ) {
+			handlerQueue.push({ elem: this, handlers: handlers.slice( delegateCount ) });
+		}
+
+		return handlerQueue;
+	},
+
+	// Includes some event props shared by KeyEvent and MouseEvent
+	props: "altKey bubbles cancelable ctrlKey currentTarget eventPhase metaKey relatedTarget shiftKey target timeStamp view which".split(" "),
+
+	fixHooks: {},
+
+	keyHooks: {
+		props: "char charCode key keyCode".split(" "),
+		filter: function( event, original ) {
+
+			// Add which for key events
+			if ( event.which == null ) {
+				event.which = original.charCode != null ? original.charCode : original.keyCode;
+			}
+
+			return event;
+		}
+	},
+
+	mouseHooks: {
+		props: "button buttons clientX clientY offsetX offsetY pageX pageY screenX screenY toElement".split(" "),
+		filter: function( event, original ) {
+			var eventDoc, doc, body,
+				button = original.button;
+
+			// Calculate pageX/Y if missing and clientX/Y available
+			if ( event.pageX == null && original.clientX != null ) {
+				eventDoc = event.target.ownerDocument || document;
+				doc = eventDoc.documentElement;
+				body = eventDoc.body;
+
+				event.pageX = original.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && body.clientLeft || 0 );
+				event.pageY = original.clientY + ( doc && doc.scrollTop  || body && body.scrollTop  || 0 ) - ( doc && doc.clientTop  || body && body.clientTop  || 0 );
+			}
+
+			// Add which for click: 1 === left; 2 === middle; 3 === right
+			// Note: button is not normalized, so don't use it
+			if ( !event.which && button !== undefined ) {
+				event.which = ( button & 1 ? 1 : ( button & 2 ? 3 : ( button & 4 ? 2 : 0 ) ) );
+			}
+
+			return event;
+		}
+	},
+
+	fix: function( event ) {
+		if ( event[ jQuery.expando ] ) {
+			return event;
+		}
+
+		// Create a writable copy of the event object and normalize some properties
+		var i, prop, copy,
+			type = event.type,
+			originalEvent = event,
+			fixHook = this.fixHooks[ type ];
+
+		if ( !fixHook ) {
+			this.fixHooks[ type ] = fixHook =
+				rmouseEvent.test( type ) ? this.mouseHooks :
+				rkeyEvent.test( type ) ? this.keyHooks :
+				{};
+		}
+		copy = fixHook.props ? this.props.concat( fixHook.props ) : this.props;
+
+		event = new jQuery.Event( originalEvent );
+
+		i = copy.length;
+		while ( i-- ) {
+			prop = copy[ i ];
+			event[ prop ] = originalEvent[ prop ];
+		}
+
+		// Support: Cordova 2.5 (WebKit) (#13255)
+		// All events should have a target; Cordova deviceready doesn't
+		if ( !event.target ) {
+			event.target = document;
+		}
+
+		// Support: Safari 6.0+, Chrome<28
+		// Target should not be a text node (#504, #13143)
+		if ( event.target.nodeType === 3 ) {
+			event.target = event.target.parentNode;
+		}
+
+		return fixHook.filter ? fixHook.filter( event, originalEvent ) : event;
+	},
+
+	special: {
+		load: {
+			// Prevent triggered image.load events from bubbling to window.load
+			noBubble: true
+		},
+		focus: {
+			// Fire native event if possible so blur/focus sequence is correct
+			trigger: function() {
+				if ( this !== safeActiveElement() && this.focus ) {
+					this.focus();
+					return false;
+				}
+			},
+			delegateType: "focusin"
+		},
+		blur: {
+			trigger: function() {
+				if ( this === safeActiveElement() && this.blur ) {
+					this.blur();
+					return false;
+				}
+			},
+			delegateType: "focusout"
+		},
+		click: {
+			// For checkbox, fire native event so checked state will be right
+			trigger: function() {
+				if ( this.type === "checkbox" && this.click && jQuery.nodeName( this, "input" ) ) {
+					this.click();
+					return false;
+				}
+			},
+
+			// For cross-browser consistency, don't fire native .click() on links
+			_default: function( event ) {
+				return jQuery.nodeName( event.target, "a" );
+			}
+		},
+
+		beforeunload: {
+			postDispatch: function( event ) {
+
+				// Support: Firefox 20+
+				// Firefox doesn't alert if the returnValue field is not set.
+				if ( event.result !== undefined && event.originalEvent ) {
+					event.originalEvent.returnValue = event.result;
+				}
+			}
+		}
+	},
+
+	simulate: function( type, elem, event, bubble ) {
+		// Piggyback on a donor event to simulate a different one.
+		// Fake originalEvent to avoid donor's stopPropagation, but if the
+		// simulated event prevents default then we do the same on the donor.
+		var e = jQuery.extend(
+			new jQuery.Event(),
+			event,
+			{
+				type: type,
+				isSimulated: true,
+				originalEvent: {}
+			}
+		);
+		if ( bubble ) {
+			jQuery.event.trigger( e, null, elem );
+		} else {
+			jQuery.event.dispatch.call( elem, e );
+		}
+		if ( e.isDefaultPrevented() ) {
+			event.preventDefault();
+		}
+	}
+};
+
+jQuery.removeEvent = function( elem, type, handle ) {
+	if ( elem.removeEventListener ) {
+		elem.removeEventListener( type, handle, false );
+	}
+};
+
+jQuery.Event = function( src, props ) {
+	// Allow instantiation without the 'new' keyword
+	if ( !(this instanceof jQuery.Event) ) {
+		return new jQuery.Event( src, props );
+	}
+
+	// Event object
+	if ( src && src.type ) {
+		this.originalEvent = src;
+		this.type = src.type;
+
+		// Events bubbling up the document may have been marked as prevented
+		// by a handler lower down the tree; reflect the correct value.
+		this.isDefaultPrevented = src.defaultPrevented ||
+				src.defaultPrevented === undefined &&
+				// Support: Android<4.0
+				src.returnValue === false ?
+			returnTrue :
+			returnFalse;
+
+	// Event type
+	} else {
+		this.type = src;
+	}
+
+	// Put explicitly provided properties onto the event object
+	if ( props ) {
+		jQuery.extend( this, props );
+	}
+
+	// Create a timestamp if incoming event doesn't have one
+	this.timeStamp = src && src.timeStamp || jQuery.now();
+
+	// Mark it as fixed
+	this[ jQuery.expando ] = true;
+};
+
+// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
+// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
+jQuery.Event.prototype = {
+	isDefaultPrevented: returnFalse,
+	isPropagationStopped: returnFalse,
+	isImmediatePropagationStopped: returnFalse,
+
+	preventDefault: function() {
+		var e = this.originalEvent;
+
+		this.isDefaultPrevented = returnTrue;
+
+		if ( e && e.preventDefault ) {
+			e.preventDefault();
+		}
+	},
+	stopPropagation: function() {
+		var e = this.originalEvent;
+
+		this.isPropagationStopped = returnTrue;
+
+		if ( e && e.stopPropagation ) {
+			e.stopPropagation();
+		}
+	},
+	stopImmediatePropagation: function() {
+		var e = this.originalEvent;
+
+		this.isImmediatePropagationStopped = returnTrue;
+
+		if ( e && e.stopImmediatePropagation ) {
+			e.stopImmediatePropagation();
+		}
+
+		this.stopPropagation();
+	}
+};
+
+// Create mouseenter/leave events using mouseover/out and event-time checks
+// Support: Chrome 15+
+jQuery.each({
+	mouseenter: "mouseover",
+	mouseleave: "mouseout",
+	pointerenter: "pointerover",
+	pointerleave: "pointerout"
+}, function( orig, fix ) {
+	jQuery.event.special[ orig ] = {
+		delegateType: fix,
+		bindType: fix,
+
+		handle: function( event ) {
+			var ret,
+				target = this,
+				related = event.relatedTarget,
+				handleObj = event.handleObj;
+
+			// For mousenter/leave call the handler if related is outside the target.
+			// NB: No relatedTarget if the mouse left/entered the browser window
+			if ( !related || (related !== target && !jQuery.contains( target, related )) ) {
+				event.type = handleObj.origType;
+				ret = handleObj.handler.apply( this, arguments );
+				event.type = fix;
+			}
+			return ret;
+		}
+	};
+});
+
+// Support: Firefox, Chrome, Safari
+// Create "bubbling" focus and blur events
+if ( !support.focusinBubbles ) {
+	jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {
+
+		// Attach a single capturing handler on the document while someone wants focusin/focusout
+		var handler = function( event ) {
+				jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
+			};
+
+		jQuery.event.special[ fix ] = {
+			setup: function() {
+				var doc = this.ownerDocument || this,
+					attaches = data_priv.access( doc, fix );
+
+				if ( !attaches ) {
+					doc.addEventListener( orig, handler, true );
+				}
+				data_priv.access( doc, fix, ( attaches || 0 ) + 1 );
+			},
+			teardown: function() {
+				var doc = this.ownerDocument || this,
+					attaches = data_priv.access( doc, fix ) - 1;
+
+				if ( !attaches ) {
+					doc.removeEventListener( orig, handler, true );
+					data_priv.remove( doc, fix );
+
+				} else {
+					data_priv.access( doc, fix, attaches );
+				}
+			}
+		};
+	});
+}
+
+jQuery.fn.extend({
+
+	on: function( types, selector, data, fn, /*INTERNAL*/ one ) {
+		var origFn, type;
+
+		// Types can be a map of types/handlers
+		if ( typeof types === "object" ) {
+			// ( types-Object, selector, data )
+			if ( typeof selector !== "string" ) {
+				// ( types-Object, data )
+				data = data || selector;
+				selector = undefined;
+			}
+			for ( type in types ) {
+				this.on( type, selector, data, types[ type ], one );
+			}
+			return this;
+		}
+
+		if ( data == null && fn == null ) {
+			// ( types, fn )
+			fn = selector;
+			data = selector = undefined;
+		} else if ( fn == null ) {
+			if ( typeof selector === "string" ) {
+				// ( types, selector, fn )
+				fn = data;
+				data = undefined;
+			} else {
+				// ( types, data, fn )
+				fn = data;
+				data = selector;
+				selector = undefined;
+			}
+		}
+		if ( fn === false ) {
+			fn = returnFalse;
+		} else if ( !fn ) {
+			return this;
+		}
+
+		if ( one === 1 ) {
+			origFn = fn;
+			fn = function( event ) {
+				// Can use an empty set, since event contains the info
+				jQuery().off( event );
+				return origFn.apply( this, arguments );
+			};
+			// Use same guid so caller can remove using origFn
+			fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
+		}
+		return this.each( function() {
+			jQuery.event.add( this, types, fn, data, selector );
+		});
+	},
+	one: function( types, selector, data, fn ) {
+		return this.on( types, selector, data, fn, 1 );
+	},
+	off: function( types, selector, fn ) {
+		var handleObj, type;
+		if ( types && types.preventDefault && types.handleObj ) {
+			// ( event )  dispatched jQuery.Event
+			handleObj = types.handleObj;
+			jQuery( types.delegateTarget ).off(
+				handleObj.namespace ? handleObj.origType + "." + handleObj.namespace : handleObj.origType,
+				handleObj.selector,
+				handleObj.handler
+			);
+			return this;
+		}
+		if ( typeof types === "object" ) {
+			// ( types-object [, selector] )
+			for ( type in types ) {
+				this.off( type, selector, types[ type ] );
+			}
+			return this;
+		}
+		if ( selector === false || typeof selector === "function" ) {
+			// ( types [, fn] )
+			fn = selector;
+			selector = undefined;
+		}
+		if ( fn === false ) {
+			fn = returnFalse;
+		}
+		return this.each(function() {
+			jQuery.event.remove( this, types, fn, selector );
+		});
+	},
+
+	trigger: function( type, data ) {
+		return this.each(function() {
+			jQuery.event.trigger( type, data, this );
+		});
+	},
+	triggerHandler: function( type, data ) {
+		var elem = this[0];
+		if ( elem ) {
+			return jQuery.event.trigger( type, data, elem, true );
+		}
+	}
+});
+
+
+var
+	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/gi,
+	rtagName = /<([\w:]+)/,
+	rhtml = /<|&#?\w+;/,
+	rnoInnerhtml = /<(?:script|style|link)/i,
+	// checked="checked" or checked
+	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
+	rscriptType = /^$|\/(?:java|ecma)script/i,
+	rscriptTypeMasked = /^true\/(.*)/,
+	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g,
+
+	// We have to close these tags to support XHTML (#13200)
+	wrapMap = {
+
+		// Support: IE9
+		option: [ 1, "<select multiple='multiple'>", "</select>" ],
+
+		thead: [ 1, "<table>", "</table>" ],
+		col: [ 2, "<table><colgroup>", "</colgroup></table>" ],
+		tr: [ 2, "<table><tbody>", "</tbody></table>" ],
+		td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],
+
+		_default: [ 0, "", "" ]
+	};
+
+// Support: IE9
+wrapMap.optgroup = wrapMap.option;
+
+wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
+wrapMap.th = wrapMap.td;
+
+// Support: 1.x compatibility
+// Manipulating tables requires a tbody
+function manipulationTarget( elem, content ) {
+	return jQuery.nodeName( elem, "table" ) &&
+		jQuery.nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ?
+
+		elem.getElementsByTagName("tbody")[0] ||
+			elem.appendChild( elem.ownerDocument.createElement("tbody") ) :
+		elem;
+}
+
+// Replace/restore the type attribute of script elements for safe DOM manipulation
+function disableScript( elem ) {
+	elem.type = (elem.getAttribute("type") !== null) + "/" + elem.type;
+	return elem;
+}
+function restoreScript( elem ) {
+	var match = rscriptTypeMasked.exec( elem.type );
+
+	if ( match ) {
+		elem.type = match[ 1 ];
+	} else {
+		elem.removeAttribute("type");
+	}
+
+	return elem;
+}
+
+// Mark scripts as having already been evaluated
+function setGlobalEval( elems, refElements ) {
+	var i = 0,
+		l = elems.length;
+
+	for ( ; i < l; i++ ) {
+		data_priv.set(
+			elems[ i ], "globalEval", !refElements || data_priv.get( refElements[ i ], "globalEval" )
+		);
+	}
+}
+
+function cloneCopyEvent( src, dest ) {
+	var i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;
+
+	if ( dest.nodeType !== 1 ) {
+		return;
+	}
+
+	// 1. Copy private data: events, handlers, etc.
+	if ( data_priv.hasData( src ) ) {
+		pdataOld = data_priv.access( src );
+		pdataCur = data_priv.set( dest, pdataOld );
+		events = pdataOld.events;
+
+		if ( events ) {
+			delete pdataCur.handle;
+			pdataCur.events = {};
+
+			for ( type in events ) {
+				for ( i = 0, l = events[ type ].length; i < l; i++ ) {
+					jQuery.event.add( dest, type, events[ type ][ i ] );
+				}
+			}
+		}
+	}
+
+	// 2. Copy user data
+	if ( data_user.hasData( src ) ) {
+		udataOld = data_user.access( src );
+		udataCur = jQuery.extend( {}, udataOld );
+
+		data_user.set( dest, udataCur );
+	}
+}
+
+function getAll( context, tag ) {
+	var ret = context.getElementsByTagName ? context.getElementsByTagName( tag || "*" ) :
+			context.querySelectorAll ? context.querySelectorAll( tag || "*" ) :
+			[];
+
+	return tag === undefined || tag && jQuery.nodeName( context, tag ) ?
+		jQuery.merge( [ context ], ret ) :
+		ret;
+}
+
+// Fix IE bugs, see support tests
+function fixInput( src, dest ) {
+	var nodeName = dest.nodeName.toLowerCase();
+
+	// Fails to persist the checked state of a cloned checkbox or radio button.
+	if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
+		dest.checked = src.checked;
+
+	// Fails to return the selected option to the default selected state when cloning options
+	} else if ( nodeName === "input" || nodeName === "textarea" ) {
+		dest.defaultValue = src.defaultValue;
+	}
+}
+
+jQuery.extend({
+	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
+		var i, l, srcElements, destElements,
+			clone = elem.cloneNode( true ),
+			inPage = jQuery.contains( elem.ownerDocument, elem );
+
+		// Fix IE cloning issues
+		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
+				!jQuery.isXMLDoc( elem ) ) {
+
+			// We eschew Sizzle here for performance reasons: http://jsperf.com/getall-vs-sizzle/2
+			destElements = getAll( clone );
+			srcElements = getAll( elem );
+
+			for ( i = 0, l = srcElements.length; i < l; i++ ) {
+				fixInput( srcElements[ i ], destElements[ i ] );
+			}
+		}
+
+		// Copy the events from the original to the clone
+		if ( dataAndEvents ) {
+			if ( deepDataAndEvents ) {
+				srcElements = srcElements || getAll( elem );
+				destElements = destElements || getAll( clone );
+
+				for ( i = 0, l = srcElements.length; i < l; i++ ) {
+					cloneCopyEvent( srcElements[ i ], destElements[ i ] );
+				}
+			} else {
+				cloneCopyEvent( elem, clone );
+			}
+		}
+
+		// Preserve script evaluation history
+		destElements = getAll( clone, "script" );
+		if ( destElements.length > 0 ) {
+			setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
+		}
+
+		// Return the cloned set
+		return clone;
+	},
+
+	buildFragment: function( elems, context, scripts, selection ) {
+		var elem, tmp, tag, wrap, contains, j,
+			fragment = context.createDocumentFragment(),
+			nodes = [],
+			i = 0,
+			l = elems.length;
+
+		for ( ; i < l; i++ ) {
+			elem = elems[ i ];
+
+			if ( elem || elem === 0 ) {
+
+				// Add nodes directly
+				if ( jQuery.type( elem ) === "object" ) {
+					// Support: QtWebKit, PhantomJS
+					// push.apply(_, arraylike) throws on ancient WebKit
+					jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );
+
+				// Convert non-html into a text node
+				} else if ( !rhtml.test( elem ) ) {
+					nodes.push( context.createTextNode( elem ) );
+
+				// Convert html into DOM nodes
+				} else {
+					tmp = tmp || fragment.appendChild( context.createElement("div") );
+
+					// Deserialize a standard representation
+					tag = ( rtagName.exec( elem ) || [ "", "" ] )[ 1 ].toLowerCase();
+					wrap = wrapMap[ tag ] || wrapMap._default;
+					tmp.innerHTML = wrap[ 1 ] + elem.replace( rxhtmlTag, "<$1></$2>" ) + wrap[ 2 ];
+
+					// Descend through wrappers to the right content
+					j = wrap[ 0 ];
+					while ( j-- ) {
+						tmp = tmp.lastChild;
+					}
+
+					// Support: QtWebKit, PhantomJS
+					// push.apply(_, arraylike) throws on ancient WebKit
+					jQuery.merge( nodes, tmp.childNodes );
+
+					// Remember the top-level container
+					tmp = fragment.firstChild;
+
+					// Ensure the created nodes are orphaned (#12392)
+					tmp.textContent = "";
+				}
+			}
+		}
+
+		// Remove wrapper from fragment
+		fragment.textContent = "";
+
+		i = 0;
+		while ( (elem = nodes[ i++ ]) ) {
+
+			// #4087 - If origin and destination elements are the same, and this is
+			// that element, do not do anything
+			if ( selection && jQuery.inArray( elem, selection ) !== -1 ) {
+				continue;
+			}
+
+			contains = jQuery.contains( elem.ownerDocument, elem );
+
+			// Append to fragment
+			tmp = getAll( fragment.appendChild( elem ), "script" );
+
+			// Preserve script evaluation history
+			if ( contains ) {
+				setGlobalEval( tmp );
+			}
+
+			// Capture executables
+			if ( scripts ) {
+				j = 0;
+				while ( (elem = tmp[ j++ ]) ) {
+					if ( rscriptType.test( elem.type || "" ) ) {
+						scripts.push( elem );
+					}
+				}
+			}
+		}
+
+		return fragment;
+	},
+
+	cleanData: function( elems ) {
+		var data, elem, type, key,
+			special = jQuery.event.special,
+			i = 0;
+
+		for ( ; (elem = elems[ i ]) !== undefined; i++ ) {
+			if ( jQuery.acceptData( elem ) ) {
+				key = elem[ data_priv.expando ];
+
+				if ( key && (data = data_priv.cache[ key ]) ) {
+					if ( data.events ) {
+						for ( type in data.events ) {
+							if ( special[ type ] ) {
+								jQuery.event.remove( elem, type );
+
+							// This is a shortcut to avoid jQuery.event.remove's overhead
+							} else {
+								jQuery.removeEvent( elem, type, data.handle );
+							}
+						}
+					}
+					if ( data_priv.cache[ key ] ) {
+						// Discard any remaining `private` data
+						delete data_priv.cache[ key ];
+					}
+				}
+			}
+			// Discard any remaining `user` data
+			delete data_user.cache[ elem[ data_user.expando ] ];
+		}
+	}
+});
+
+jQuery.fn.extend({
+	text: function( value ) {
+		return access( this, function( value ) {
+			return value === undefined ?
+				jQuery.text( this ) :
+				this.empty().each(function() {
+					if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+						this.textContent = value;
+					}
+				});
+		}, null, value, arguments.length );
+	},
+
+	append: function() {
+		return this.domManip( arguments, function( elem ) {
+			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+				var target = manipulationTarget( this, elem );
+				target.appendChild( elem );
+			}
+		});
+	},
+
+	prepend: function() {
+		return this.domManip( arguments, function( elem ) {
+			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+				var target = manipulationTarget( this, elem );
+				target.insertBefore( elem, target.firstChild );
+			}
+		});
+	},
+
+	before: function() {
+		return this.domManip( arguments, function( elem ) {
+			if ( this.parentNode ) {
+				this.parentNode.insertBefore( elem, this );
+			}
+		});
+	},
+
+	after: function() {
+		return this.domManip( arguments, function( elem ) {
+			if ( this.parentNode ) {
+				this.parentNode.insertBefore( elem, this.nextSibling );
+			}
+		});
+	},
+
+	remove: function( selector, keepData /* Internal Use Only */ ) {
+		var elem,
+			elems = selector ? jQuery.filter( selector, this ) : this,
+			i = 0;
+
+		for ( ; (elem = elems[i]) != null; i++ ) {
+			if ( !keepData && elem.nodeType === 1 ) {
+				jQuery.cleanData( getAll( elem ) );
+			}
+
+			if ( elem.parentNode ) {
+				if ( keepData && jQuery.contains( elem.ownerDocument, elem ) ) {
+					setGlobalEval( getAll( elem, "script" ) );
+				}
+				elem.parentNode.removeChild( elem );
+			}
+		}
+
+		return this;
+	},
+
+	empty: function() {
+		var elem,
+			i = 0;
+
+		for ( ; (elem = this[i]) != null; i++ ) {
+			if ( elem.nodeType === 1 ) {
+
+				// Prevent memory leaks
+				jQuery.cleanData( getAll( elem, false ) );
+
+				// Remove any remaining nodes
+				elem.textContent = "";
+			}
+		}
+
+		return this;
+	},
+
+	clone: function( dataAndEvents, deepDataAndEvents ) {
+		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
+		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;
+
+		return this.map(function() {
+			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
+		});
+	},
+
+	html: function( value ) {
+		return access( this, function( value ) {
+			var elem = this[ 0 ] || {},
+				i = 0,
+				l = this.length;
+
+			if ( value === undefined && elem.nodeType === 1 ) {
+				return elem.innerHTML;
+			}
+
+			// See if we can take a shortcut and just use innerHTML
+			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
+				!wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {
+
+				value = value.replace( rxhtmlTag, "<$1></$2>" );
+
+				try {
+					for ( ; i < l; i++ ) {
+						elem = this[ i ] || {};
+
+						// Remove element nodes and prevent memory leaks
+						if ( elem.nodeType === 1 ) {
+							jQuery.cleanData( getAll( elem, false ) );
+							elem.innerHTML = value;
+						}
+					}
+
+					elem = 0;
+
+				// If using innerHTML throws an exception, use the fallback method
+				} catch( e ) {}
+			}
+
+			if ( elem ) {
+				this.empty().append( value );
+			}
+		}, null, value, arguments.length );
+	},
+
+	replaceWith: function() {
+		var arg = arguments[ 0 ];
+
+		// Make the changes, replacing each context element with the new content
+		this.domManip( arguments, function( elem ) {
+			arg = this.parentNode;
+
+			jQuery.cleanData( getAll( this ) );
+
+			if ( arg ) {
+				arg.replaceChild( elem, this );
+			}
+		});
+
+		// Force removal if there was no new content (e.g., from empty arguments)
+		return arg && (arg.length || arg.nodeType) ? this : this.remove();
+	},
+
+	detach: function( selector ) {
+		return this.remove( selector, true );
+	},
+
+	domManip: function( args, callback ) {
+
+		// Flatten any nested arrays
+		args = concat.apply( [], args );
+
+		var fragment, first, scripts, hasScripts, node, doc,
+			i = 0,
+			l = this.length,
+			set = this,
+			iNoClone = l - 1,
+			value = args[ 0 ],
+			isFunction = jQuery.isFunction( value );
+
+		// We can't cloneNode fragments that contain checked, in WebKit
+		if ( isFunction ||
+				( l > 1 && typeof value === "string" &&
+					!support.checkClone && rchecked.test( value ) ) ) {
+			return this.each(function( index ) {
+				var self = set.eq( index );
+				if ( isFunction ) {
+					args[ 0 ] = value.call( this, index, self.html() );
+				}
+				self.domManip( args, callback );
+			});
+		}
+
+		if ( l ) {
+			fragment = jQuery.buildFragment( args, this[ 0 ].ownerDocument, false, this );
+			first = fragment.firstChild;
+
+			if ( fragment.childNodes.length === 1 ) {
+				fragment = first;
+			}
+
+			if ( first ) {
+				scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
+				hasScripts = scripts.length;
+
+				// Use the original fragment for the last item instead of the first because it can end up
+				// being emptied incorrectly in certain situations (#8070).
+				for ( ; i < l; i++ ) {
+					node = fragment;
+
+					if ( i !== iNoClone ) {
+						node = jQuery.clone( node, true, true );
+
+						// Keep references to cloned scripts for later restoration
+						if ( hasScripts ) {
+							// Support: QtWebKit
+							// jQuery.merge because push.apply(_, arraylike) throws
+							jQuery.merge( scripts, getAll( node, "script" ) );
+						}
+					}
+
+					callback.call( this[ i ], node, i );
+				}
+
+				if ( hasScripts ) {
+					doc = scripts[ scripts.length - 1 ].ownerDocument;
+
+					// Reenable scripts
+					jQuery.map( scripts, restoreScript );
+
+					// Evaluate executable scripts on first document insertion
+					for ( i = 0; i < hasScripts; i++ ) {
+						node = scripts[ i ];
+						if ( rscriptType.test( node.type || "" ) &&
+							!data_priv.access( node, "globalEval" ) && jQuery.contains( doc, node ) ) {
+
+							if ( node.src ) {
+								// Optional AJAX dependency, but won't run scripts if not present
+								if ( jQuery._evalUrl ) {
+									jQuery._evalUrl( node.src );
+								}
+							} else {
+								jQuery.globalEval( node.textContent.replace( rcleanScript, "" ) );
+							}
+						}
+					}
+				}
+			}
+		}
+
+		return this;
+	}
+});
+
+jQuery.each({
+	appendTo: "append",
+	prependTo: "prepend",
+	insertBefore: "before",
+	insertAfter: "after",
+	replaceAll: "replaceWith"
+}, function( name, original ) {
+	jQuery.fn[ name ] = function( selector ) {
+		var elems,
+			ret = [],
+			insert = jQuery( selector ),
+			last = insert.length - 1,
+			i = 0;
+
+		for ( ; i <= last; i++ ) {
+			elems = i === last ? this : this.clone( true );
+			jQuery( insert[ i ] )[ original ]( elems );
+
+			// Support: QtWebKit
+			// .get() because push.apply(_, arraylike) throws
+			push.apply( ret, elems.get() );
+		}
+
+		return this.pushStack( ret );
+	};
+});
+
+
+var iframe,
+	elemdisplay = {};
+
+/**
+ * Retrieve the actual display of a element
+ * @param {String} name nodeName of the element
+ * @param {Object} doc Document object
+ */
+// Called only from within defaultDisplay
+function actualDisplay( name, doc ) {
+	var style,
+		elem = jQuery( doc.createElement( name ) ).appendTo( doc.body ),
+
+		// getDefaultComputedStyle might be reliably used only on attached element
+		display = window.getDefaultComputedStyle && ( style = window.getDefaultComputedStyle( elem[ 0 ] ) ) ?
+
+			// Use of this method is a temporary fix (more like optimization) until something better comes along,
+			// since it was removed from specification and supported only in FF
+			style.display : jQuery.css( elem[ 0 ], "display" );
+
+	// We don't have any data stored on the element,
+	// so use "detach" method as fast way to get rid of the element
+	elem.detach();
+
+	return display;
+}
+
+/**
+ * Try to determine the default display value of an element
+ * @param {String} nodeName
+ */
+function defaultDisplay( nodeName ) {
+	var doc = document,
+		display = elemdisplay[ nodeName ];
+
+	if ( !display ) {
+		display = actualDisplay( nodeName, doc );
+
+		// If the simple way fails, read from inside an iframe
+		if ( display === "none" || !display ) {
+
+			// Use the already-created iframe if possible
+			iframe = (iframe || jQuery( "<iframe frameborder='0' width='0' height='0'/>" )).appendTo( doc.documentElement );
+
+			// Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse
+			doc = iframe[ 0 ].contentDocument;
+
+			// Support: IE
+			doc.write();
+			doc.close();
+
+			display = actualDisplay( nodeName, doc );
+			iframe.detach();
+		}
+
+		// Store the correct default display
+		elemdisplay[ nodeName ] = display;
+	}
+
+	return display;
+}
+var rmargin = (/^margin/);
+
+var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
+
+var getStyles = function( elem ) {
+		// Support: IE<=11+, Firefox<=30+ (#15098, #14150)
+		// IE throws on elements created in popups
+		// FF meanwhile throws on frame elements through "defaultView.getComputedStyle"
+		if ( elem.ownerDocument.defaultView.opener ) {
+			return elem.ownerDocument.defaultView.getComputedStyle( elem, null );
+		}
+
+		return window.getComputedStyle( elem, null );
+	};
+
+
+
+function curCSS( elem, name, computed ) {
+	var width, minWidth, maxWidth, ret,
+		style = elem.style;
+
+	computed = computed || getStyles( elem );
+
+	// Support: IE9
+	// getPropertyValue is only needed for .css('filter') (#12537)
+	if ( computed ) {
+		ret = computed.getPropertyValue( name ) || computed[ name ];
+	}
+
+	if ( computed ) {
+
+		if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
+			ret = jQuery.style( elem, name );
+		}
+
+		// Support: iOS < 6
+		// A tribute to the "awesome hack by Dean Edwards"
+		// iOS < 6 (at least) returns percentage for a larger set of values, but width seems to be reliably pixels
+		// this is against the CSSOM draft spec: http://dev.w3.org/csswg/cssom/#resolved-values
+		if ( rnumnonpx.test( ret ) && rmargin.test( name ) ) {
+
+			// Remember the original values
+			width = style.width;
+			minWidth = style.minWidth;
+			maxWidth = style.maxWidth;
+
+			// Put in the new values to get a computed value out
+			style.minWidth = style.maxWidth = style.width = ret;
+			ret = computed.width;
+
+			// Revert the changed values
+			style.width = width;
+			style.minWidth = minWidth;
+			style.maxWidth = maxWidth;
+		}
+	}
+
+	return ret !== undefined ?
+		// Support: IE
+		// IE returns zIndex value as an integer.
+		ret + "" :
+		ret;
+}
+
+
+function addGetHookIf( conditionFn, hookFn ) {
+	// Define the hook, we'll check on the first run if it's really needed.
+	return {
+		get: function() {
+			if ( conditionFn() ) {
+				// Hook not needed (or it's not possible to use it due
+				// to missing dependency), remove it.
+				delete this.get;
+				return;
+			}
+
+			// Hook needed; redefine it so that the support test is not executed again.
+			return (this.get = hookFn).apply( this, arguments );
+		}
+	};
+}
+
+
+(function() {
+	var pixelPositionVal, boxSizingReliableVal,
+		docElem = document.documentElement,
+		container = document.createElement( "div" ),
+		div = document.createElement( "div" );
+
+	if ( !div.style ) {
+		return;
+	}
+
+	// Support: IE9-11+
+	// Style of cloned element affects source element cloned (#8908)
+	div.style.backgroundClip = "content-box";
+	div.cloneNode( true ).style.backgroundClip = "";
+	support.clearCloneStyle = div.style.backgroundClip === "content-box";
+
+	container.style.cssText = "border:0;width:0;height:0;top:0;left:-9999px;margin-top:1px;" +
+		"position:absolute";
+	container.appendChild( div );
+
+	// Executing both pixelPosition & boxSizingReliable tests require only one layout
+	// so they're executed at the same time to save the second computation.
+	function computePixelPositionAndBoxSizingReliable() {
+		div.style.cssText =
+			// Support: Firefox<29, Android 2.3
+			// Vendor-prefix box-sizing
+			"-webkit-box-sizing:border-box;-moz-box-sizing:border-box;" +
+			"box-sizing:border-box;display:block;margin-top:1%;top:1%;" +
+			"border:1px;padding:1px;width:4px;position:absolute";
+		div.innerHTML = "";
+		docElem.appendChild( container );
+
+		var divStyle = window.getComputedStyle( div, null );
+		pixelPositionVal = divStyle.top !== "1%";
+		boxSizingReliableVal = divStyle.width === "4px";
+
+		docElem.removeChild( container );
+	}
+
+	// Support: node.js jsdom
+	// Don't assume that getComputedStyle is a property of the global object
+	if ( window.getComputedStyle ) {
+		jQuery.extend( support, {
+			pixelPosition: function() {
+
+				// This test is executed only once but we still do memoizing
+				// since we can use the boxSizingReliable pre-computing.
+				// No need to check if the test was already performed, though.
+				computePixelPositionAndBoxSizingReliable();
+				return pixelPositionVal;
+			},
+			boxSizingReliable: function() {
+				if ( boxSizingReliableVal == null ) {
+					computePixelPositionAndBoxSizingReliable();
+				}
+				return boxSizingReliableVal;
+			},
+			reliableMarginRight: function() {
+
+				// Support: Android 2.3
+				// Check if div with explicit width and no margin-right incorrectly
+				// gets computed margin-right based on width of container. (#3333)
+				// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
+				// This support function is only executed once so no memoizing is needed.
+				var ret,
+					marginDiv = div.appendChild( document.createElement( "div" ) );
+
+				// Reset CSS: box-sizing; display; margin; border; padding
+				marginDiv.style.cssText = div.style.cssText =
+					// Support: Firefox<29, Android 2.3
+					// Vendor-prefix box-sizing
+					"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;" +
+					"box-sizing:content-box;display:block;margin:0;border:0;padding:0";
+				marginDiv.style.marginRight = marginDiv.style.width = "0";
+				div.style.width = "1px";
+				docElem.appendChild( container );
+
+				ret = !parseFloat( window.getComputedStyle( marginDiv, null ).marginRight );
+
+				docElem.removeChild( container );
+				div.removeChild( marginDiv );
+
+				return ret;
+			}
+		});
+	}
+})();
+
+
+// A method for quickly swapping in/out CSS properties to get correct calculations.
+jQuery.swap = function( elem, options, callback, args ) {
+	var ret, name,
+		old = {};
+
+	// Remember the old values, and insert the new ones
+	for ( name in options ) {
+		old[ name ] = elem.style[ name ];
+		elem.style[ name ] = options[ name ];
+	}
+
+	ret = callback.apply( elem, args || [] );
+
+	// Revert the old values
+	for ( name in options ) {
+		elem.style[ name ] = old[ name ];
+	}
+
+	return ret;
+};
+
+
+var
+	// Swappable if display is none or starts with table except "table", "table-cell", or "table-caption"
+	// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
+	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
+	rnumsplit = new RegExp( "^(" + pnum + ")(.*)$", "i" ),
+	rrelNum = new RegExp( "^([+-])=(" + pnum + ")", "i" ),
+
+	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
+	cssNormalTransform = {
+		letterSpacing: "0",
+		fontWeight: "400"
+	},
+
+	cssPrefixes = [ "Webkit", "O", "Moz", "ms" ];
+
+// Return a css property mapped to a potentially vendor prefixed property
+function vendorPropName( style, name ) {
+
+	// Shortcut for names that are not vendor prefixed
+	if ( name in style ) {
+		return name;
+	}
+
+	// Check for vendor prefixed names
+	var capName = name[0].toUpperCase() + name.slice(1),
+		origName = name,
+		i = cssPrefixes.length;
+
+	while ( i-- ) {
+		name = cssPrefixes[ i ] + capName;
+		if ( name in style ) {
+			return name;
+		}
+	}
+
+	return origName;
+}
+
+function setPositiveNumber( elem, value, subtract ) {
+	var matches = rnumsplit.exec( value );
+	return matches ?
+		// Guard against undefined "subtract", e.g., when used as in cssHooks
+		Math.max( 0, matches[ 1 ] - ( subtract || 0 ) ) + ( matches[ 2 ] || "px" ) :
+		value;
+}
+
+function augmentWidthOrHeight( elem, name, extra, isBorderBox, styles ) {
+	var i = extra === ( isBorderBox ? "border" : "content" ) ?
+		// If we already have the right measurement, avoid augmentation
+		4 :
+		// Otherwise initialize for horizontal or vertical properties
+		name === "width" ? 1 : 0,
+
+		val = 0;
+
+	for ( ; i < 4; i += 2 ) {
+		// Both box models exclude margin, so add it if we want it
+		if ( extra === "margin" ) {
+			val += jQuery.css( elem, extra + cssExpand[ i ], true, styles );
+		}
+
+		if ( isBorderBox ) {
+			// border-box includes padding, so remove it if we want content
+			if ( extra === "content" ) {
+				val -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
+			}
+
+			// At this point, extra isn't border nor margin, so remove border
+			if ( extra !== "margin" ) {
+				val -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+			}
+		} else {
+			// At this point, extra isn't content, so add padding
+			val += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
+
+			// At this point, extra isn't content nor padding, so add border
+			if ( extra !== "padding" ) {
+				val += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+			}
+		}
+	}
+
+	return val;
+}
+
+function getWidthOrHeight( elem, name, extra ) {
+
+	// Start with offset property, which is equivalent to the border-box value
+	var valueIsBorderBox = true,
+		val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
+		styles = getStyles( elem ),
+		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box";
+
+	// Some non-html elements return undefined for offsetWidth, so check for null/undefined
+	// svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
+	// MathML - https://bugzilla.mozilla.org/show_bug.cgi?id=491668
+	if ( val <= 0 || val == null ) {
+		// Fall back to computed then uncomputed css if necessary
+		val = curCSS( elem, name, styles );
+		if ( val < 0 || val == null ) {
+			val = elem.style[ name ];
+		}
+
+		// Computed unit is not pixels. Stop here and return.
+		if ( rnumnonpx.test(val) ) {
+			return val;
+		}
+
+		// Check for style in case a browser which returns unreliable values
+		// for getComputedStyle silently falls back to the reliable elem.style
+		valueIsBorderBox = isBorderBox &&
+			( support.boxSizingReliable() || val === elem.style[ name ] );
+
+		// Normalize "", auto, and prepare for extra
+		val = parseFloat( val ) || 0;
+	}
+
+	// Use the active box-sizing model to add/subtract irrelevant styles
+	return ( val +
+		augmentWidthOrHeight(
+			elem,
+			name,
+			extra || ( isBorderBox ? "border" : "content" ),
+			valueIsBorderBox,
+			styles
+		)
+	) + "px";
+}
+
+function showHide( elements, show ) {
+	var display, elem, hidden,
+		values = [],
+		index = 0,
+		length = elements.length;
+
+	for ( ; index < length; index++ ) {
+		elem = elements[ index ];
+		if ( !elem.style ) {
+			continue;
+		}
+
+		values[ index ] = data_priv.get( elem, "olddisplay" );
+		display = elem.style.display;
+		if ( show ) {
+			// Reset the inline display of this element to learn if it is
+			// being hidden by cascaded rules or not
+			if ( !values[ index ] && display === "none" ) {
+				elem.style.display = "";
+			}
+
+			// Set elements which have been overridden with display: none
+			// in a stylesheet to whatever the default browser style is
+			// for such an element
+			if ( elem.style.display === "" && isHidden( elem ) ) {
+				values[ index ] = data_priv.access( elem, "olddisplay", defaultDisplay(elem.nodeName) );
+			}
+		} else {
+			hidden = isHidden( elem );
+
+			if ( display !== "none" || !hidden ) {
+				data_priv.set( elem, "olddisplay", hidden ? display : jQuery.css( elem, "display" ) );
+			}
+		}
+	}
+
+	// Set the display of most of the elements in a second loop
+	// to avoid the constant reflow
+	for ( index = 0; index < length; index++ ) {
+		elem = elements[ index ];
+		if ( !elem.style ) {
+			continue;
+		}
+		if ( !show || elem.style.display === "none" || elem.style.display === "" ) {
+			elem.style.display = show ? values[ index ] || "" : "none";
+		}
+	}
+
+	return elements;
+}
+
+jQuery.extend({
+
+	// Add in style property hooks for overriding the default
+	// behavior of getting and setting a style property
+	cssHooks: {
+		opacity: {
+			get: function( elem, computed ) {
+				if ( computed ) {
+
+					// We should always get a number back from opacity
+					var ret = curCSS( elem, "opacity" );
+					return ret === "" ? "1" : ret;
+				}
+			}
+		}
+	},
+
+	// Don't automatically add "px" to these possibly-unitless properties
+	cssNumber: {
+		"columnCount": true,
+		"fillOpacity": true,
+		"flexGrow": true,
+		"flexShrink": true,
+		"fontWeight": true,
+		"lineHeight": true,
+		"opacity": true,
+		"order": true,
+		"orphans": true,
+		"widows": true,
+		"zIndex": true,
+		"zoom": true
+	},
+
+	// Add in properties whose names you wish to fix before
+	// setting or getting the value
+	cssProps: {
+		"float": "cssFloat"
+	},
+
+	// Get and set the style property on a DOM Node
+	style: function( elem, name, value, extra ) {
+
+		// Don't set styles on text and comment nodes
+		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
+			return;
+		}
+
+		// Make sure that we're working with the right name
+		var ret, type, hooks,
+			origName = jQuery.camelCase( name ),
+			style = elem.style;
+
+		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( style, origName ) );
+
+		// Gets hook for the prefixed version, then unprefixed version
+		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
+
+		// Check if we're setting a value
+		if ( value !== undefined ) {
+			type = typeof value;
+
+			// Convert "+=" or "-=" to relative numbers (#7345)
+			if ( type === "string" && (ret = rrelNum.exec( value )) ) {
+				value = ( ret[1] + 1 ) * ret[2] + parseFloat( jQuery.css( elem, name ) );
+				// Fixes bug #9237
+				type = "number";
+			}
+
+			// Make sure that null and NaN values aren't set (#7116)
+			if ( value == null || value !== value ) {
+				return;
+			}
+
+			// If a number, add 'px' to the (except for certain CSS properties)
+			if ( type === "number" && !jQuery.cssNumber[ origName ] ) {
+				value += "px";
+			}
+
+			// Support: IE9-11+
+			// background-* props affect original clone's values
+			if ( !support.clearCloneStyle && value === "" && name.indexOf( "background" ) === 0 ) {
+				style[ name ] = "inherit";
+			}
+
+			// If a hook was provided, use that value, otherwise just set the specified value
+			if ( !hooks || !("set" in hooks) || (value = hooks.set( elem, value, extra )) !== undefined ) {
+				style[ name ] = value;
+			}
+
+		} else {
+			// If a hook was provided get the non-computed value from there
+			if ( hooks && "get" in hooks && (ret = hooks.get( elem, false, extra )) !== undefined ) {
+				return ret;
+			}
+
+			// Otherwise just get the value from the style object
+			return style[ name ];
+		}
+	},
+
+	css: function( elem, name, extra, styles ) {
+		var val, num, hooks,
+			origName = jQuery.camelCase( name );
+
+		// Make sure that we're working with the right name
+		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( elem.style, origName ) );
+
+		// Try prefixed name followed by the unprefixed name
+		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
+
+		// If a hook was provided get the computed value from there
+		if ( hooks && "get" in hooks ) {
+			val = hooks.get( elem, true, extra );
+		}
+
+		// Otherwise, if a way to get the computed value exists, use that
+		if ( val === undefined ) {
+			val = curCSS( elem, name, styles );
+		}
+
+		// Convert "normal" to computed value
+		if ( val === "normal" && name in cssNormalTransform ) {
+			val = cssNormalTransform[ name ];
+		}
+
+		// Make numeric if forced or a qualifier was provided and val looks numeric
+		if ( extra === "" || extra ) {
+			num = parseFloat( val );
+			return extra === true || jQuery.isNumeric( num ) ? num || 0 : val;
+		}
+		return val;
+	}
+});
+
+jQuery.each([ "height", "width" ], function( i, name ) {
+	jQuery.cssHooks[ name ] = {
+		get: function( elem, computed, extra ) {
+			if ( computed ) {
+
+				// Certain elements can have dimension info if we invisibly show them
+				// but it must have a current display style that would benefit
+				return rdisplayswap.test( jQuery.css( elem, "display" ) ) && elem.offsetWidth === 0 ?
+					jQuery.swap( elem, cssShow, function() {
+						return getWidthOrHeight( elem, name, extra );
+					}) :
+					getWidthOrHeight( elem, name, extra );
+			}
+		},
+
+		set: function( elem, value, extra ) {
+			var styles = extra && getStyles( elem );
+			return setPositiveNumber( elem, value, extra ?
+				augmentWidthOrHeight(
+					elem,
+					name,
+					extra,
+					jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+					styles
+				) : 0
+			);
+		}
+	};
+});
+
+// Support: Android 2.3
+jQuery.cssHooks.marginRight = addGetHookIf( support.reliableMarginRight,
+	function( elem, computed ) {
+		if ( computed ) {
+			return jQuery.swap( elem, { "display": "inline-block" },
+				curCSS, [ elem, "marginRight" ] );
+		}
+	}
+);
+
+// These hooks are used by animate to expand properties
+jQuery.each({
+	margin: "",
+	padding: "",
+	border: "Width"
+}, function( prefix, suffix ) {
+	jQuery.cssHooks[ prefix + suffix ] = {
+		expand: function( value ) {
+			var i = 0,
+				expanded = {},
+
+				// Assumes a single number if not a string
+				parts = typeof value === "string" ? value.split(" ") : [ value ];
+
+			for ( ; i < 4; i++ ) {
+				expanded[ prefix + cssExpand[ i ] + suffix ] =
+					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
+			}
+
+			return expanded;
+		}
+	};
+
+	if ( !rmargin.test( prefix ) ) {
+		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
+	}
+});
+
+jQuery.fn.extend({
+	css: function( name, value ) {
+		return access( this, function( elem, name, value ) {
+			var styles, len,
+				map = {},
+				i = 0;
+
+			if ( jQuery.isArray( name ) ) {
+				styles = getStyles( elem );
+				len = name.length;
+
+				for ( ; i < len; i++ ) {
+					map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
+				}
+
+				return map;
+			}
+
+			return value !== undefined ?
+				jQuery.style( elem, name, value ) :
+				jQuery.css( elem, name );
+		}, name, value, arguments.length > 1 );
+	},
+	show: function() {
+		return showHide( this, true );
+	},
+	hide: function() {
+		return showHide( this );
+	},
+	toggle: function( state ) {
+		if ( typeof state === "boolean" ) {
+			return state ? this.show() : this.hide();
+		}
+
+		return this.each(function() {
+			if ( isHidden( this ) ) {
+				jQuery( this ).show();
+			} else {
+				jQuery( this ).hide();
+			}
+		});
+	}
+});
+
+
+function Tween( elem, options, prop, end, easing ) {
+	return new Tween.prototype.init( elem, options, prop, end, easing );
+}
+jQuery.Tween = Tween;
+
+Tween.prototype = {
+	constructor: Tween,
+	init: function( elem, options, prop, end, easing, unit ) {
+		this.elem = elem;
+		this.prop = prop;
+		this.easing = easing || "swing";
+		this.options = options;
+		this.start = this.now = this.cur();
+		this.end = end;
+		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
+	},
+	cur: function() {
+		var hooks = Tween.propHooks[ this.prop ];
+
+		return hooks && hooks.get ?
+			hooks.get( this ) :
+			Tween.propHooks._default.get( this );
+	},
+	run: function( percent ) {
+		var eased,
+			hooks = Tween.propHooks[ this.prop ];
+
+		if ( this.options.duration ) {
+			this.pos = eased = jQuery.easing[ this.easing ](
+				percent, this.options.duration * percent, 0, 1, this.options.duration
+			);
+		} else {
+			this.pos = eased = percent;
+		}
+		this.now = ( this.end - this.start ) * eased + this.start;
+
+		if ( this.options.step ) {
+			this.options.step.call( this.elem, this.now, this );
+		}
+
+		if ( hooks && hooks.set ) {
+			hooks.set( this );
+		} else {
+			Tween.propHooks._default.set( this );
+		}
+		return this;
+	}
+};
+
+Tween.prototype.init.prototype = Tween.prototype;
+
+Tween.propHooks = {
+	_default: {
+		get: function( tween ) {
+			var result;
+
+			if ( tween.elem[ tween.prop ] != null &&
+				(!tween.elem.style || tween.elem.style[ tween.prop ] == null) ) {
+				return tween.elem[ tween.prop ];
+			}
+
+			// Passing an empty string as a 3rd parameter to .css will automatically
+			// attempt a parseFloat and fallback to a string if the parse fails.
+			// Simple values such as "10px" are parsed to Float;
+			// complex values such as "rotate(1rad)" are returned as-is.
+			result = jQuery.css( tween.elem, tween.prop, "" );
+			// Empty strings, null, undefined and "auto" are converted to 0.
+			return !result || result === "auto" ? 0 : result;
+		},
+		set: function( tween ) {
+			// Use step hook for back compat.
+			// Use cssHook if its there.
+			// Use .style if available and use plain properties where available.
+			if ( jQuery.fx.step[ tween.prop ] ) {
+				jQuery.fx.step[ tween.prop ]( tween );
+			} else if ( tween.elem.style && ( tween.elem.style[ jQuery.cssProps[ tween.prop ] ] != null || jQuery.cssHooks[ tween.prop ] ) ) {
+				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
+			} else {
+				tween.elem[ tween.prop ] = tween.now;
+			}
+		}
+	}
+};
+
+// Support: IE9
+// Panic based approach to setting things on disconnected nodes
+Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
+	set: function( tween ) {
+		if ( tween.elem.nodeType && tween.elem.parentNode ) {
+			tween.elem[ tween.prop ] = tween.now;
+		}
+	}
+};
+
+jQuery.easing = {
+	linear: function( p ) {
+		return p;
+	},
+	swing: function( p ) {
+		return 0.5 - Math.cos( p * Math.PI ) / 2;
+	}
+};
+
+jQuery.fx = Tween.prototype.init;
+
+// Back Compat <1.8 extension point
+jQuery.fx.step = {};
+
+
+
+
+var
+	fxNow, timerId,
+	rfxtypes = /^(?:toggle|show|hide)$/,
+	rfxnum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" ),
+	rrun = /queueHooks$/,
+	animationPrefilters = [ defaultPrefilter ],
+	tweeners = {
+		"*": [ function( prop, value ) {
+			var tween = this.createTween( prop, value ),
+				target = tween.cur(),
+				parts = rfxnum.exec( value ),
+				unit = parts && parts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),
+
+				// Starting value computation is required for potential unit mismatches
+				start = ( jQuery.cssNumber[ prop ] || unit !== "px" && +target ) &&
+					rfxnum.exec( jQuery.css( tween.elem, prop ) ),
+				scale = 1,
+				maxIterations = 20;
+
+			if ( start && start[ 3 ] !== unit ) {
+				// Trust units reported by jQuery.css
+				unit = unit || start[ 3 ];
+
+				// Make sure we update the tween properties later on
+				parts = parts || [];
+
+				// Iteratively approximate from a nonzero starting point
+				start = +target || 1;
+
+				do {
+					// If previous iteration zeroed out, double until we get *something*.
+					// Use string for doubling so we don't accidentally see scale as unchanged below
+					scale = scale || ".5";
+
+					// Adjust and apply
+					start = start / scale;
+					jQuery.style( tween.elem, prop, start + unit );
+
+				// Update scale, tolerating zero or NaN from tween.cur(),
+				// break the loop if scale is unchanged or perfect, or if we've just had enough
+				} while ( scale !== (scale = tween.cur() / target) && scale !== 1 && --maxIterations );
+			}
+
+			// Update tween properties
+			if ( parts ) {
+				start = tween.start = +start || +target || 0;
+				tween.unit = unit;
+				// If a +=/-= token was provided, we're doing a relative animation
+				tween.end = parts[ 1 ] ?
+					start + ( parts[ 1 ] + 1 ) * parts[ 2 ] :
+					+parts[ 2 ];
+			}
+
+			return tween;
+		} ]
+	};
+
+// Animations created synchronously will run synchronously
+function createFxNow() {
+	setTimeout(function() {
+		fxNow = undefined;
+	});
+	return ( fxNow = jQuery.now() );
+}
+
+// Generate parameters to create a standard animation
+function genFx( type, includeWidth ) {
+	var which,
+		i = 0,
+		attrs = { height: type };
+
+	// If we include width, step value is 1 to do all cssExpand values,
+	// otherwise step value is 2 to skip over Left and Right
+	includeWidth = includeWidth ? 1 : 0;
+	for ( ; i < 4 ; i += 2 - includeWidth ) {
+		which = cssExpand[ i ];
+		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
+	}
+
+	if ( includeWidth ) {
+		attrs.opacity = attrs.width = type;
+	}
+
+	return attrs;
+}
+
+function createTween( value, prop, animation ) {
+	var tween,
+		collection = ( tweeners[ prop ] || [] ).concat( tweeners[ "*" ] ),
+		index = 0,
+		length = collection.length;
+	for ( ; index < length; index++ ) {
+		if ( (tween = collection[ index ].call( animation, prop, value )) ) {
+
+			// We're done with this property
+			return tween;
+		}
+	}
+}
+
+function defaultPrefilter( elem, props, opts ) {
+	/* jshint validthis: true */
+	var prop, value, toggle, tween, hooks, oldfire, display, checkDisplay,
+		anim = this,
+		orig = {},
+		style = elem.style,
+		hidden = elem.nodeType && isHidden( elem ),
+		dataShow = data_priv.get( elem, "fxshow" );
+
+	// Handle queue: false promises
+	if ( !opts.queue ) {
+		hooks = jQuery._queueHooks( elem, "fx" );
+		if ( hooks.unqueued == null ) {
+			hooks.unqueued = 0;
+			oldfire = hooks.empty.fire;
+			hooks.empty.fire = function() {
+				if ( !hooks.unqueued ) {
+					oldfire();
+				}
+			};
+		}
+		hooks.unqueued++;
+
+		anim.always(function() {
+			// Ensure the complete handler is called before this completes
+			anim.always(function() {
+				hooks.unqueued--;
+				if ( !jQuery.queue( elem, "fx" ).length ) {
+					hooks.empty.fire();
+				}
+			});
+		});
+	}
+
+	// Height/width overflow pass
+	if ( elem.nodeType === 1 && ( "height" in props || "width" in props ) ) {
+		// Make sure that nothing sneaks out
+		// Record all 3 overflow attributes because IE9-10 do not
+		// change the overflow attribute when overflowX and
+		// overflowY are set to the same value
+		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];
+
+		// Set display property to inline-block for height/width
+		// animations on inline elements that are having width/height animated
+		display = jQuery.css( elem, "display" );
+
+		// Test default display if display is currently "none"
+		checkDisplay = display === "none" ?
+			data_priv.get( elem, "olddisplay" ) || defaultDisplay( elem.nodeName ) : display;
+
+		if ( checkDisplay === "inline" && jQuery.css( elem, "float" ) === "none" ) {
+			style.display = "inline-block";
+		}
+	}
+
+	if ( opts.overflow ) {
+		style.overflow = "hidden";
+		anim.always(function() {
+			style.overflow = opts.overflow[ 0 ];
+			style.overflowX = opts.overflow[ 1 ];
+			style.overflowY = opts.overflow[ 2 ];
+		});
+	}
+
+	// show/hide pass
+	for ( prop in props ) {
+		value = props[ prop ];
+		if ( rfxtypes.exec( value ) ) {
+			delete props[ prop ];
+			toggle = toggle || value === "toggle";
+			if ( value === ( hidden ? "hide" : "show" ) ) {
+
+				// If there is dataShow left over from a stopped hide or show and we are going to proceed with show, we should pretend to be hidden
+				if ( value === "show" && dataShow && dataShow[ prop ] !== undefined ) {
+					hidden = true;
+				} else {
+					continue;
+				}
+			}
+			orig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );
+
+		// Any non-fx value stops us from restoring the original display value
+		} else {
+			display = undefined;
+		}
+	}
+
+	if ( !jQuery.isEmptyObject( orig ) ) {
+		if ( dataShow ) {
+			if ( "hidden" in dataShow ) {
+				hidden = dataShow.hidden;
+			}
+		} else {
+			dataShow = data_priv.access( elem, "fxshow", {} );
+		}
+
+		// Store state if its toggle - enables .stop().toggle() to "reverse"
+		if ( toggle ) {
+			dataShow.hidden = !hidden;
+		}
+		if ( hidden ) {
+			jQuery( elem ).show();
+		} else {
+			anim.done(function() {
+				jQuery( elem ).hide();
+			});
+		}
+		anim.done(function() {
+			var prop;
+
+			data_priv.remove( elem, "fxshow" );
+			for ( prop in orig ) {
+				jQuery.style( elem, prop, orig[ prop ] );
+			}
+		});
+		for ( prop in orig ) {
+			tween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );
+
+			if ( !( prop in dataShow ) ) {
+				dataShow[ prop ] = tween.start;
+				if ( hidden ) {
+					tween.end = tween.start;
+					tween.start = prop === "width" || prop === "height" ? 1 : 0;
+				}
+			}
+		}
+
+	// If this is a noop like .hide().hide(), restore an overwritten display value
+	} else if ( (display === "none" ? defaultDisplay( elem.nodeName ) : display) === "inline" ) {
+		style.display = display;
+	}
+}
+
+function propFilter( props, specialEasing ) {
+	var index, name, easing, value, hooks;
+
+	// camelCase, specialEasing and expand cssHook pass
+	for ( index in props ) {
+		name = jQuery.camelCase( index );
+		easing = specialEasing[ name ];
+		value = props[ index ];
+		if ( jQuery.isArray( value ) ) {
+			easing = value[ 1 ];
+			value = props[ index ] = value[ 0 ];
+		}
+
+		if ( index !== name ) {
+			props[ name ] = value;
+			delete props[ index ];
+		}
+
+		hooks = jQuery.cssHooks[ name ];
+		if ( hooks && "expand" in hooks ) {
+			value = hooks.expand( value );
+			delete props[ name ];
+
+			// Not quite $.extend, this won't overwrite existing keys.
+			// Reusing 'index' because we have the correct "name"
+			for ( index in value ) {
+				if ( !( index in props ) ) {
+					props[ index ] = value[ index ];
+					specialEasing[ index ] = easing;
+				}
+			}
+		} else {
+			specialEasing[ name ] = easing;
+		}
+	}
+}
+
+function Animation( elem, properties, options ) {
+	var result,
+		stopped,
+		index = 0,
+		length = animationPrefilters.length,
+		deferred = jQuery.Deferred().always( function() {
+			// Don't match elem in the :animated selector
+			delete tick.elem;
+		}),
+		tick = function() {
+			if ( stopped ) {
+				return false;
+			}
+			var currentTime = fxNow || createFxNow(),
+				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
+				// Support: Android 2.3
+				// Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (#12497)
+				temp = remaining / animation.duration || 0,
+				percent = 1 - temp,
+				index = 0,
+				length = animation.tweens.length;
+
+			for ( ; index < length ; index++ ) {
+				animation.tweens[ index ].run( percent );
+			}
+
+			deferred.notifyWith( elem, [ animation, percent, remaining ]);
+
+			if ( percent < 1 && length ) {
+				return remaining;
+			} else {
+				deferred.resolveWith( elem, [ animation ] );
+				return false;
+			}
+		},
+		animation = deferred.promise({
+			elem: elem,
+			props: jQuery.extend( {}, properties ),
+			opts: jQuery.extend( true, { specialEasing: {} }, options ),
+			originalProperties: properties,
+			originalOptions: options,
+			startTime: fxNow || createFxNow(),
+			duration: options.duration,
+			tweens: [],
+			createTween: function( prop, end ) {
+				var tween = jQuery.Tween( elem, animation.opts, prop, end,
+						animation.opts.specialEasing[ prop ] || animation.opts.easing );
+				animation.tweens.push( tween );
+				return tween;
+			},
+			stop: function( gotoEnd ) {
+				var index = 0,
+					// If we are going to the end, we want to run all the tweens
+					// otherwise we skip this part
+					length = gotoEnd ? animation.tweens.length : 0;
+				if ( stopped ) {
+					return this;
+				}
+				stopped = true;
+				for ( ; index < length ; index++ ) {
+					animation.tweens[ index ].run( 1 );
+				}
+
+				// Resolve when we played the last frame; otherwise, reject
+				if ( gotoEnd ) {
+					deferred.resolveWith( elem, [ animation, gotoEnd ] );
+				} else {
+					deferred.rejectWith( elem, [ animation, gotoEnd ] );
+				}
+				return this;
+			}
+		}),
+		props = animation.props;
+
+	propFilter( props, animation.opts.specialEasing );
+
+	for ( ; index < length ; index++ ) {
+		result = animationPrefilters[ index ].call( animation, elem, props, animation.opts );
+		if ( result ) {
+			return result;
+		}
+	}
+
+	jQuery.map( props, createTween, animation );
+
+	if ( jQuery.isFunction( animation.opts.start ) ) {
+		animation.opts.start.call( elem, animation );
+	}
+
+	jQuery.fx.timer(
+		jQuery.extend( tick, {
+			elem: elem,
+			anim: animation,
+			queue: animation.opts.queue
+		})
+	);
+
+	// attach callbacks from options
+	return animation.progress( animation.opts.progress )
+		.done( animation.opts.done, animation.opts.complete )
+		.fail( animation.opts.fail )
+		.always( animation.opts.always );
+}
+
+jQuery.Animation = jQuery.extend( Animation, {
+
+	tweener: function( props, callback ) {
+		if ( jQuery.isFunction( props ) ) {
+			callback = props;
+			props = [ "*" ];
+		} else {
+			props = props.split(" ");
+		}
+
+		var prop,
+			index = 0,
+			length = props.length;
+
+		for ( ; index < length ; index++ ) {
+			prop = props[ index ];
+			tweeners[ prop ] = tweeners[ prop ] || [];
+			tweeners[ prop ].unshift( callback );
+		}
+	},
+
+	prefilter: function( callback, prepend ) {
+		if ( prepend ) {
+			animationPrefilters.unshift( callback );
+		} else {
+			animationPrefilters.push( callback );
+		}
+	}
+});
+
+jQuery.speed = function( speed, easing, fn ) {
+	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
+		complete: fn || !fn && easing ||
+			jQuery.isFunction( speed ) && speed,
+		duration: speed,
+		easing: fn && easing || easing && !jQuery.isFunction( easing ) && easing
+	};
+
+	opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
+		opt.duration in jQuery.fx.speeds ? jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;
+
+	// Normalize opt.queue - true/undefined/null -> "fx"
+	if ( opt.queue == null || opt.queue === true ) {
+		opt.queue = "fx";
+	}
+
+	// Queueing
+	opt.old = opt.complete;
+
+	opt.complete = function() {
+		if ( jQuery.isFunction( opt.old ) ) {
+			opt.old.call( this );
+		}
+
+		if ( opt.queue ) {
+			jQuery.dequeue( this, opt.queue );
+		}
+	};
+
+	return opt;
+};
+
+jQuery.fn.extend({
+	fadeTo: function( speed, to, easing, callback ) {
+
+		// Show any hidden elements after setting opacity to 0
+		return this.filter( isHidden ).css( "opacity", 0 ).show()
+
+			// Animate to the value specified
+			.end().animate({ opacity: to }, speed, easing, callback );
+	},
+	animate: function( prop, speed, easing, callback ) {
+		var empty = jQuery.isEmptyObject( prop ),
+			optall = jQuery.speed( speed, easing, callback ),
+			doAnimation = function() {
+				// Operate on a copy of prop so per-property easing won't be lost
+				var anim = Animation( this, jQuery.extend( {}, prop ), optall );
+
+				// Empty animations, or finishing resolves immediately
+				if ( empty || data_priv.get( this, "finish" ) ) {
+					anim.stop( true );
+				}
+			};
+			doAnimation.finish = doAnimation;
+
+		return empty || optall.queue === false ?
+			this.each( doAnimation ) :
+			this.queue( optall.queue, doAnimation );
+	},
+	stop: function( type, clearQueue, gotoEnd ) {
+		var stopQueue = function( hooks ) {
+			var stop = hooks.stop;
+			delete hooks.stop;
+			stop( gotoEnd );
+		};
+
+		if ( typeof type !== "string" ) {
+			gotoEnd = clearQueue;
+			clearQueue = type;
+			type = undefined;
+		}
+		if ( clearQueue && type !== false ) {
+			this.queue( type || "fx", [] );
+		}
+
+		return this.each(function() {
+			var dequeue = true,
+				index = type != null && type + "queueHooks",
+				timers = jQuery.timers,
+				data = data_priv.get( this );
+
+			if ( index ) {
+				if ( data[ index ] && data[ index ].stop ) {
+					stopQueue( data[ index ] );
+				}
+			} else {
+				for ( index in data ) {
+					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
+						stopQueue( data[ index ] );
+					}
+				}
+			}
+
+			for ( index = timers.length; index--; ) {
+				if ( timers[ index ].elem === this && (type == null || timers[ index ].queue === type) ) {
+					timers[ index ].anim.stop( gotoEnd );
+					dequeue = false;
+					timers.splice( index, 1 );
+				}
+			}
+
+			// Start the next in the queue if the last step wasn't forced.
+			// Timers currently will call their complete callbacks, which
+			// will dequeue but only if they were gotoEnd.
+			if ( dequeue || !gotoEnd ) {
+				jQuery.dequeue( this, type );
+			}
+		});
+	},
+	finish: function( type ) {
+		if ( type !== false ) {
+			type = type || "fx";
+		}
+		return this.each(function() {
+			var index,
+				data = data_priv.get( this ),
+				queue = data[ type + "queue" ],
+				hooks = data[ type + "queueHooks" ],
+				timers = jQuery.timers,
+				length = queue ? queue.length : 0;
+
+			// Enable finishing flag on private data
+			data.finish = true;
+
+			// Empty the queue first
+			jQuery.queue( this, type, [] );
+
+			if ( hooks && hooks.stop ) {
+				hooks.stop.call( this, true );
+			}
+
+			// Look for any active animations, and finish them
+			for ( index = timers.length; index--; ) {
+				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
+					timers[ index ].anim.stop( true );
+					timers.splice( index, 1 );
+				}
+			}
+
+			// Look for any animations in the old queue and finish them
+			for ( index = 0; index < length; index++ ) {
+				if ( queue[ index ] && queue[ index ].finish ) {
+					queue[ index ].finish.call( this );
+				}
+			}
+
+			// Turn off finishing flag
+			delete data.finish;
+		});
+	}
+});
+
+jQuery.each([ "toggle", "show", "hide" ], function( i, name ) {
+	var cssFn = jQuery.fn[ name ];
+	jQuery.fn[ name ] = function( speed, easing, callback ) {
+		return speed == null || typeof speed === "boolean" ?
+			cssFn.apply( this, arguments ) :
+			this.animate( genFx( name, true ), speed, easing, callback );
+	};
+});
+
+// Generate shortcuts for custom animations
+jQuery.each({
+	slideDown: genFx("show"),
+	slideUp: genFx("hide"),
+	slideToggle: genFx("toggle"),
+	fadeIn: { opacity: "show" },
+	fadeOut: { opacity: "hide" },
+	fadeToggle: { opacity: "toggle" }
+}, function( name, props ) {
+	jQuery.fn[ name ] = function( speed, easing, callback ) {
+		return this.animate( props, speed, easing, callback );
+	};
+});
+
+jQuery.timers = [];
+jQuery.fx.tick = function() {
+	var timer,
+		i = 0,
+		timers = jQuery.timers;
+
+	fxNow = jQuery.now();
+
+	for ( ; i < timers.length; i++ ) {
+		timer = timers[ i ];
+		// Checks the timer has not already been removed
+		if ( !timer() && timers[ i ] === timer ) {
+			timers.splice( i--, 1 );
+		}
+	}
+
+	if ( !timers.length ) {
+		jQuery.fx.stop();
+	}
+	fxNow = undefined;
+};
+
+jQuery.fx.timer = function( timer ) {
+	jQuery.timers.push( timer );
+	if ( timer() ) {
+		jQuery.fx.start();
+	} else {
+		jQuery.timers.pop();
+	}
+};
+
+jQuery.fx.interval = 13;
+
+jQuery.fx.start = function() {
+	if ( !timerId ) {
+		timerId = setInterval( jQuery.fx.tick, jQuery.fx.interval );
+	}
+};
+
+jQuery.fx.stop = function() {
+	clearInterval( timerId );
+	timerId = null;
+};
+
+jQuery.fx.speeds = {
+	slow: 600,
+	fast: 200,
+	// Default speed
+	_default: 400
+};
+
+
+// Based off of the plugin by Clint Helfers, with permission.
+// http://blindsignals.com/index.php/2009/07/jquery-delay/
+jQuery.fn.delay = function( time, type ) {
+	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
+	type = type || "fx";
+
+	return this.queue( type, function( next, hooks ) {
+		var timeout = setTimeout( next, time );
+		hooks.stop = function() {
+			clearTimeout( timeout );
+		};
+	});
+};
+
+
+(function() {
+	var input = document.createElement( "input" ),
+		select = document.createElement( "select" ),
+		opt = select.appendChild( document.createElement( "option" ) );
+
+	input.type = "checkbox";
+
+	// Support: iOS<=5.1, Android<=4.2+
+	// Default value for a checkbox should be "on"
+	support.checkOn = input.value !== "";
+
+	// Support: IE<=11+
+	// Must access selectedIndex to make default options select
+	support.optSelected = opt.selected;
+
+	// Support: Android<=2.3
+	// Options inside disabled selects are incorrectly marked as disabled
+	select.disabled = true;
+	support.optDisabled = !opt.disabled;
+
+	// Support: IE<=11+
+	// An input loses its value after becoming a radio
+	input = document.createElement( "input" );
+	input.value = "t";
+	input.type = "radio";
+	support.radioValue = input.value === "t";
+})();
+
+
+var nodeHook, boolHook,
+	attrHandle = jQuery.expr.attrHandle;
+
+jQuery.fn.extend({
+	attr: function( name, value ) {
+		return access( this, jQuery.attr, name, value, arguments.length > 1 );
+	},
+
+	removeAttr: function( name ) {
+		return this.each(function() {
+			jQuery.removeAttr( this, name );
+		});
+	}
+});
+
+jQuery.extend({
+	attr: function( elem, name, value ) {
+		var hooks, ret,
+			nType = elem.nodeType;
+
+		// don't get/set attributes on text, comment and attribute nodes
+		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
+			return;
+		}
+
+		// Fallback to prop when attributes are not supported
+		if ( typeof elem.getAttribute === strundefined ) {
+			return jQuery.prop( elem, name, value );
+		}
+
+		// All attributes are lowercase
+		// Grab necessary hook if one is defined
+		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
+			name = name.toLowerCase();
+			hooks = jQuery.attrHooks[ name ] ||
+				( jQuery.expr.match.bool.test( name ) ? boolHook : nodeHook );
+		}
+
+		if ( value !== undefined ) {
+
+			if ( value === null ) {
+				jQuery.removeAttr( elem, name );
+
+			} else if ( hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ) {
+				return ret;
+
+			} else {
+				elem.setAttribute( name, value + "" );
+				return value;
+			}
+
+		} else if ( hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ) {
+			return ret;
+
+		} else {
+			ret = jQuery.find.attr( elem, name );
+
+			// Non-existent attributes return null, we normalize to undefined
+			return ret == null ?
+				undefined :
+				ret;
+		}
+	},
+
+	removeAttr: function( elem, value ) {
+		var name, propName,
+			i = 0,
+			attrNames = value && value.match( rnotwhite );
+
+		if ( attrNames && elem.nodeType === 1 ) {
+			while ( (name = attrNames[i++]) ) {
+				propName = jQuery.propFix[ name ] || name;
+
+				// Boolean attributes get special treatment (#10870)
+				if ( jQuery.expr.match.bool.test( name ) ) {
+					// Set corresponding property to false
+					elem[ propName ] = false;
+				}
+
+				elem.removeAttribute( name );
+			}
+		}
+	},
+
+	attrHooks: {
+		type: {
+			set: function( elem, value ) {
+				if ( !support.radioValue && value === "radio" &&
+					jQuery.nodeName( elem, "input" ) ) {
+					var val = elem.value;
+					elem.setAttribute( "type", value );
+					if ( val ) {
+						elem.value = val;
+					}
+					return value;
+				}
+			}
+		}
+	}
+});
+
+// Hooks for boolean attributes
+boolHook = {
+	set: function( elem, value, name ) {
+		if ( value === false ) {
+			// Remove boolean attributes when set to false
+			jQuery.removeAttr( elem, name );
+		} else {
+			elem.setAttribute( name, name );
+		}
+		return name;
+	}
+};
+jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
+	var getter = attrHandle[ name ] || jQuery.find.attr;
+
+	attrHandle[ name ] = function( elem, name, isXML ) {
+		var ret, handle;
+		if ( !isXML ) {
+			// Avoid an infinite loop by temporarily removing this function from the getter
+			handle = attrHandle[ name ];
+			attrHandle[ name ] = ret;
+			ret = getter( elem, name, isXML ) != null ?
+				name.toLowerCase() :
+				null;
+			attrHandle[ name ] = handle;
+		}
+		return ret;
+	};
+});
+
+
+
+
+var rfocusable = /^(?:input|select|textarea|button)$/i;
+
+jQuery.fn.extend({
+	prop: function( name, value ) {
+		return access( this, jQuery.prop, name, value, arguments.length > 1 );
+	},
+
+	removeProp: function( name ) {
+		return this.each(function() {
+			delete this[ jQuery.propFix[ name ] || name ];
+		});
+	}
+});
+
+jQuery.extend({
+	propFix: {
+		"for": "htmlFor",
+		"class": "className"
+	},
+
+	prop: function( elem, name, value ) {
+		var ret, hooks, notxml,
+			nType = elem.nodeType;
+
+		// Don't get/set properties on text, comment and attribute nodes
+		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
+			return;
+		}
+
+		notxml = nType !== 1 || !jQuery.isXMLDoc( elem );
+
+		if ( notxml ) {
+			// Fix name and attach hooks
+			name = jQuery.propFix[ name ] || name;
+			hooks = jQuery.propHooks[ name ];
+		}
+
+		if ( value !== undefined ) {
+			return hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ?
+				ret :
+				( elem[ name ] = value );
+
+		} else {
+			return hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ?
+				ret :
+				elem[ name ];
+		}
+	},
+
+	propHooks: {
+		tabIndex: {
+			get: function( elem ) {
+				return elem.hasAttribute( "tabindex" ) || rfocusable.test( elem.nodeName ) || elem.href ?
+					elem.tabIndex :
+					-1;
+			}
+		}
+	}
+});
+
+if ( !support.optSelected ) {
+	jQuery.propHooks.selected = {
+		get: function( elem ) {
+			var parent = elem.parentNode;
+			if ( parent && parent.parentNode ) {
+				parent.parentNode.selectedIndex;
+			}
+			return null;
+		}
+	};
+}
+
+jQuery.each([
+	"tabIndex",
+	"readOnly",
+	"maxLength",
+	"cellSpacing",
+	"cellPadding",
+	"rowSpan",
+	"colSpan",
+	"useMap",
+	"frameBorder",
+	"contentEditable"
+], function() {
+	jQuery.propFix[ this.toLowerCase() ] = this;
+});
+
+
+
+
+var rclass = /[\t\r\n\f]/g;
+
+jQuery.fn.extend({
+	addClass: function( value ) {
+		var classes, elem, cur, clazz, j, finalValue,
+			proceed = typeof value === "string" && value,
+			i = 0,
+			len = this.length;
+
+		if ( jQuery.isFunction( value ) ) {
+			return this.each(function( j ) {
+				jQuery( this ).addClass( value.call( this, j, this.className ) );
+			});
+		}
+
+		if ( proceed ) {
+			// The disjunction here is for better compressibility (see removeClass)
+			classes = ( value || "" ).match( rnotwhite ) || [];
+
+			for ( ; i < len; i++ ) {
+				elem = this[ i ];
+				cur = elem.nodeType === 1 && ( elem.className ?
+					( " " + elem.className + " " ).replace( rclass, " " ) :
+					" "
+				);
+
+				if ( cur ) {
+					j = 0;
+					while ( (clazz = classes[j++]) ) {
+						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
+							cur += clazz + " ";
+						}
+					}
+
+					// only assign if different to avoid unneeded rendering.
+					finalValue = jQuery.trim( cur );
+					if ( elem.className !== finalValue ) {
+						elem.className = finalValue;
+					}
+				}
+			}
+		}
+
+		return this;
+	},
+
+	removeClass: function( value ) {
+		var classes, elem, cur, clazz, j, finalValue,
+			proceed = arguments.length === 0 || typeof value === "string" && value,
+			i = 0,
+			len = this.length;
+
+		if ( jQuery.isFunction( value ) ) {
+			return this.each(function( j ) {
+				jQuery( this ).removeClass( value.call( this, j, this.className ) );
+			});
+		}
+		if ( proceed ) {
+			classes = ( value || "" ).match( rnotwhite ) || [];
+
+			for ( ; i < len; i++ ) {
+				elem = this[ i ];
+				// This expression is here for better compressibility (see addClass)
+				cur = elem.nodeType === 1 && ( elem.className ?
+					( " " + elem.className + " " ).replace( rclass, " " ) :
+					""
+				);
+
+				if ( cur ) {
+					j = 0;
+					while ( (clazz = classes[j++]) ) {
+						// Remove *all* instances
+						while ( cur.indexOf( " " + clazz + " " ) >= 0 ) {
+							cur = cur.replace( " " + clazz + " ", " " );
+						}
+					}
+
+					// Only assign if different to avoid unneeded rendering.
+					finalValue = value ? jQuery.trim( cur ) : "";
+					if ( elem.className !== finalValue ) {
+						elem.className = finalValue;
+					}
+				}
+			}
+		}
+
+		return this;
+	},
+
+	toggleClass: function( value, stateVal ) {
+		var type = typeof value;
+
+		if ( typeof stateVal === "boolean" && type === "string" ) {
+			return stateVal ? this.addClass( value ) : this.removeClass( value );
+		}
+
+		if ( jQuery.isFunction( value ) ) {
+			return this.each(function( i ) {
+				jQuery( this ).toggleClass( value.call(this, i, this.className, stateVal), stateVal );
+			});
+		}
+
+		return this.each(function() {
+			if ( type === "string" ) {
+				// Toggle individual class names
+				var className,
+					i = 0,
+					self = jQuery( this ),
+					classNames = value.match( rnotwhite ) || [];
+
+				while ( (className = classNames[ i++ ]) ) {
+					// Check each className given, space separated list
+					if ( self.hasClass( className ) ) {
+						self.removeClass( className );
+					} else {
+						self.addClass( className );
+					}
+				}
+
+			// Toggle whole class name
+			} else if ( type === strundefined || type === "boolean" ) {
+				if ( this.className ) {
+					// store className if set
+					data_priv.set( this, "__className__", this.className );
+				}
+
+				// If the element has a class name or if we're passed `false`,
+				// then remove the whole classname (if there was one, the above saved it).
+				// Otherwise bring back whatever was previously saved (if anything),
+				// falling back to the empty string if nothing was stored.
+				this.className = this.className || value === false ? "" : data_priv.get( this, "__className__" ) || "";
+			}
+		});
+	},
+
+	hasClass: function( selector ) {
+		var className = " " + selector + " ",
+			i = 0,
+			l = this.length;
+		for ( ; i < l; i++ ) {
+			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) >= 0 ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+});
+
+
+
+
+var rreturn = /\r/g;
+
+jQuery.fn.extend({
+	val: function( value ) {
+		var hooks, ret, isFunction,
+			elem = this[0];
+
+		if ( !arguments.length ) {
+			if ( elem ) {
+				hooks = jQuery.valHooks[ elem.type ] || jQuery.valHooks[ elem.nodeName.toLowerCase() ];
+
+				if ( hooks && "get" in hooks && (ret = hooks.get( elem, "value" )) !== undefined ) {
+					return ret;
+				}
+
+				ret = elem.value;
+
+				return typeof ret === "string" ?
+					// Handle most common string cases
+					ret.replace(rreturn, "") :
+					// Handle cases where value is null/undef or number
+					ret == null ? "" : ret;
+			}
+
+			return;
+		}
+
+		isFunction = jQuery.isFunction( value );
+
+		return this.each(function( i ) {
+			var val;
+
+			if ( this.nodeType !== 1 ) {
+				return;
+			}
+
+			if ( isFunction ) {
+				val = value.call( this, i, jQuery( this ).val() );
+			} else {
+				val = value;
+			}
+
+			// Treat null/undefined as ""; convert numbers to string
+			if ( val == null ) {
+				val = "";
+
+			} else if ( typeof val === "number" ) {
+				val += "";
+
+			} else if ( jQuery.isArray( val ) ) {
+				val = jQuery.map( val, function( value ) {
+					return value == null ? "" : value + "";
+				});
+			}
+
+			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];
+
+			// If set returns undefined, fall back to normal setting
+			if ( !hooks || !("set" in hooks) || hooks.set( this, val, "value" ) === undefined ) {
+				this.value = val;
+			}
+		});
+	}
+});
+
+jQuery.extend({
+	valHooks: {
+		option: {
+			get: function( elem ) {
+				var val = jQuery.find.attr( elem, "value" );
+				return val != null ?
+					val :
+					// Support: IE10-11+
+					// option.text throws exceptions (#14686, #14858)
+					jQuery.trim( jQuery.text( elem ) );
+			}
+		},
+		select: {
+			get: function( elem ) {
+				var value, option,
+					options = elem.options,
+					index = elem.selectedIndex,
+					one = elem.type === "select-one" || index < 0,
+					values = one ? null : [],
+					max = one ? index + 1 : options.length,
+					i = index < 0 ?
+						max :
+						one ? index : 0;
+
+				// Loop through all the selected options
+				for ( ; i < max; i++ ) {
+					option = options[ i ];
+
+					// IE6-9 doesn't update selected after form reset (#2551)
+					if ( ( option.selected || i === index ) &&
+							// Don't return options that are disabled or in a disabled optgroup
+							( support.optDisabled ? !option.disabled : option.getAttribute( "disabled" ) === null ) &&
+							( !option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" ) ) ) {
+
+						// Get the specific value for the option
+						value = jQuery( option ).val();
+
+						// We don't need an array for one selects
+						if ( one ) {
+							return value;
+						}
+
+						// Multi-Selects return an array
+						values.push( value );
+					}
+				}
+
+				return values;
+			},
+
+			set: function( elem, value ) {
+				var optionSet, option,
+					options = elem.options,
+					values = jQuery.makeArray( value ),
+					i = options.length;
+
+				while ( i-- ) {
+					option = options[ i ];
+					if ( (option.selected = jQuery.inArray( option.value, values ) >= 0) ) {
+						optionSet = true;
+					}
+				}
+
+				// Force browsers to behave consistently when non-matching value is set
+				if ( !optionSet ) {
+					elem.selectedIndex = -1;
+				}
+				return values;
+			}
+		}
+	}
+});
+
+// Radios and checkboxes getter/setter
+jQuery.each([ "radio", "checkbox" ], function() {
+	jQuery.valHooks[ this ] = {
+		set: function( elem, value ) {
+			if ( jQuery.isArray( value ) ) {
+				return ( elem.checked = jQuery.inArray( jQuery(elem).val(), value ) >= 0 );
+			}
+		}
+	};
+	if ( !support.checkOn ) {
+		jQuery.valHooks[ this ].get = function( elem ) {
+			return elem.getAttribute("value") === null ? "on" : elem.value;
+		};
+	}
+});
+
+
+
+
+// Return jQuery for attributes-only inclusion
+
+
+jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
+	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
+	"change select submit keydown keypress keyup error contextmenu").split(" "), function( i, name ) {
+
+	// Handle event binding
+	jQuery.fn[ name ] = function( data, fn ) {
+		return arguments.length > 0 ?
+			this.on( name, null, data, fn ) :
+			this.trigger( name );
+	};
+});
+
+jQuery.fn.extend({
+	hover: function( fnOver, fnOut ) {
+		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
+	},
+
+	bind: function( types, data, fn ) {
+		return this.on( types, null, data, fn );
+	},
+	unbind: function( types, fn ) {
+		return this.off( types, null, fn );
+	},
+
+	delegate: function( selector, types, data, fn ) {
+		return this.on( types, selector, data, fn );
+	},
+	undelegate: function( selector, types, fn ) {
+		// ( namespace ) or ( selector, types [, fn] )
+		return arguments.length === 1 ? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
+	}
+});
+
+
+var nonce = jQuery.now();
+
+var rquery = (/\?/);
+
+
+
+// Support: Android 2.3
+// Workaround failure to string-cast null input
+jQuery.parseJSON = function( data ) {
+	return JSON.parse( data + "" );
+};
+
+
+// Cross-browser xml parsing
+jQuery.parseXML = function( data ) {
+	var xml, tmp;
+	if ( !data || typeof data !== "string" ) {
+		return null;
+	}
+
+	// Support: IE9
+	try {
+		tmp = new DOMParser();
+		xml = tmp.parseFromString( data, "text/xml" );
+	} catch ( e ) {
+		xml = undefined;
+	}
+
+	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
+		jQuery.error( "Invalid XML: " + data );
+	}
+	return xml;
+};
+
+
+var
+	rhash = /#.*$/,
+	rts = /([?&])_=[^&]*/,
+	rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
+	// #7653, #8125, #8152: local protocol detection
+	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
+	rnoContent = /^(?:GET|HEAD)$/,
+	rprotocol = /^\/\//,
+	rurl = /^([\w.+-]+:)(?:\/\/(?:[^\/?#]*@|)([^\/?#:]*)(?::(\d+)|)|)/,
+
+	/* Prefilters
+	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
+	 * 2) These are called:
+	 *    - BEFORE asking for a transport
+	 *    - AFTER param serialization (s.data is a string if s.processData is true)
+	 * 3) key is the dataType
+	 * 4) the catchall symbol "*" can be used
+	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
+	 */
+	prefilters = {},
+
+	/* Transports bindings
+	 * 1) key is the dataType
+	 * 2) the catchall symbol "*" can be used
+	 * 3) selection will start with transport dataType and THEN go to "*" if needed
+	 */
+	transports = {},
+
+	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
+	allTypes = "*/".concat( "*" ),
+
+	// Document location
+	ajaxLocation = window.location.href,
+
+	// Segment location into parts
+	ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() ) || [];
+
+// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
+function addToPrefiltersOrTransports( structure ) {
+
+	// dataTypeExpression is optional and defaults to "*"
+	return function( dataTypeExpression, func ) {
+
+		if ( typeof dataTypeExpression !== "string" ) {
+			func = dataTypeExpression;
+			dataTypeExpression = "*";
+		}
+
+		var dataType,
+			i = 0,
+			dataTypes = dataTypeExpression.toLowerCase().match( rnotwhite ) || [];
+
+		if ( jQuery.isFunction( func ) ) {
+			// For each dataType in the dataTypeExpression
+			while ( (dataType = dataTypes[i++]) ) {
+				// Prepend if requested
+				if ( dataType[0] === "+" ) {
+					dataType = dataType.slice( 1 ) || "*";
+					(structure[ dataType ] = structure[ dataType ] || []).unshift( func );
+
+				// Otherwise append
+				} else {
+					(structure[ dataType ] = structure[ dataType ] || []).push( func );
+				}
+			}
+		}
+	};
+}
+
+// Base inspection function for prefilters and transports
+function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {
+
+	var inspected = {},
+		seekingTransport = ( structure === transports );
+
+	function inspect( dataType ) {
+		var selected;
+		inspected[ dataType ] = true;
+		jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
+			var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
+			if ( typeof dataTypeOrTransport === "string" && !seekingTransport && !inspected[ dataTypeOrTransport ] ) {
+				options.dataTypes.unshift( dataTypeOrTransport );
+				inspect( dataTypeOrTransport );
+				return false;
+			} else if ( seekingTransport ) {
+				return !( selected = dataTypeOrTransport );
+			}
+		});
+		return selected;
+	}
+
+	return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
+}
+
+// A special extend for ajax options
+// that takes "flat" options (not to be deep extended)
+// Fixes #9887
+function ajaxExtend( target, src ) {
+	var key, deep,
+		flatOptions = jQuery.ajaxSettings.flatOptions || {};
+
+	for ( key in src ) {
+		if ( src[ key ] !== undefined ) {
+			( flatOptions[ key ] ? target : ( deep || (deep = {}) ) )[ key ] = src[ key ];
+		}
+	}
+	if ( deep ) {
+		jQuery.extend( true, target, deep );
+	}
+
+	return target;
+}
+
+/* Handles responses to an ajax request:
+ * - finds the right dataType (mediates between content-type and expected dataType)
+ * - returns the corresponding response
+ */
+function ajaxHandleResponses( s, jqXHR, responses ) {
+
+	var ct, type, finalDataType, firstDataType,
+		contents = s.contents,
+		dataTypes = s.dataTypes;
+
+	// Remove auto dataType and get content-type in the process
+	while ( dataTypes[ 0 ] === "*" ) {
+		dataTypes.shift();
+		if ( ct === undefined ) {
+			ct = s.mimeType || jqXHR.getResponseHeader("Content-Type");
+		}
+	}
+
+	// Check if we're dealing with a known content-type
+	if ( ct ) {
+		for ( type in contents ) {
+			if ( contents[ type ] && contents[ type ].test( ct ) ) {
+				dataTypes.unshift( type );
+				break;
+			}
+		}
+	}
+
+	// Check to see if we have a response for the expected dataType
+	if ( dataTypes[ 0 ] in responses ) {
+		finalDataType = dataTypes[ 0 ];
+	} else {
+		// Try convertible dataTypes
+		for ( type in responses ) {
+			if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[0] ] ) {
+				finalDataType = type;
+				break;
+			}
+			if ( !firstDataType ) {
+				firstDataType = type;
+			}
+		}
+		// Or just use first one
+		finalDataType = finalDataType || firstDataType;
+	}
+
+	// If we found a dataType
+	// We add the dataType to the list if needed
+	// and return the corresponding response
+	if ( finalDataType ) {
+		if ( finalDataType !== dataTypes[ 0 ] ) {
+			dataTypes.unshift( finalDataType );
+		}
+		return responses[ finalDataType ];
+	}
+}
+
+/* Chain conversions given the request and the original response
+ * Also sets the responseXXX fields on the jqXHR instance
+ */
+function ajaxConvert( s, response, jqXHR, isSuccess ) {
+	var conv2, current, conv, tmp, prev,
+		converters = {},
+		// Work with a copy of dataTypes in case we need to modify it for conversion
+		dataTypes = s.dataTypes.slice();
+
+	// Create converters map with lowercased keys
+	if ( dataTypes[ 1 ] ) {
+		for ( conv in s.converters ) {
+			converters[ conv.toLowerCase() ] = s.converters[ conv ];
+		}
+	}
+
+	current = dataTypes.shift();
+
+	// Convert to each sequential dataType
+	while ( current ) {
+
+		if ( s.responseFields[ current ] ) {
+			jqXHR[ s.responseFields[ current ] ] = response;
+		}
+
+		// Apply the dataFilter if provided
+		if ( !prev && isSuccess && s.dataFilter ) {
+			response = s.dataFilter( response, s.dataType );
+		}
+
+		prev = current;
+		current = dataTypes.shift();
+
+		if ( current ) {
+
+		// There's only work to do if current dataType is non-auto
+			if ( current === "*" ) {
+
+				current = prev;
+
+			// Convert response if prev dataType is non-auto and differs from current
+			} else if ( prev !== "*" && prev !== current ) {
+
+				// Seek a direct converter
+				conv = converters[ prev + " " + current ] || converters[ "* " + current ];
+
+				// If none found, seek a pair
+				if ( !conv ) {
+					for ( conv2 in converters ) {
+
+						// If conv2 outputs current
+						tmp = conv2.split( " " );
+						if ( tmp[ 1 ] === current ) {
+
+							// If prev can be converted to accepted input
+							conv = converters[ prev + " " + tmp[ 0 ] ] ||
+								converters[ "* " + tmp[ 0 ] ];
+							if ( conv ) {
+								// Condense equivalence converters
+								if ( conv === true ) {
+									conv = converters[ conv2 ];
+
+								// Otherwise, insert the intermediate dataType
+								} else if ( converters[ conv2 ] !== true ) {
+									current = tmp[ 0 ];
+									dataTypes.unshift( tmp[ 1 ] );
+								}
+								break;
+							}
+						}
+					}
+				}
+
+				// Apply converter (if not an equivalence)
+				if ( conv !== true ) {
+
+					// Unless errors are allowed to bubble, catch and return them
+					if ( conv && s[ "throws" ] ) {
+						response = conv( response );
+					} else {
+						try {
+							response = conv( response );
+						} catch ( e ) {
+							return { state: "parsererror", error: conv ? e : "No conversion from " + prev + " to " + current };
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return { state: "success", data: response };
+}
+
+jQuery.extend({
+
+	// Counter for holding the number of active queries
+	active: 0,
+
+	// Last-Modified header cache for next request
+	lastModified: {},
+	etag: {},
+
+	ajaxSettings: {
+		url: ajaxLocation,
+		type: "GET",
+		isLocal: rlocalProtocol.test( ajaxLocParts[ 1 ] ),
+		global: true,
+		processData: true,
+		async: true,
+		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
+		/*
+		timeout: 0,
+		data: null,
+		dataType: null,
+		username: null,
+		password: null,
+		cache: null,
+		throws: false,
+		traditional: false,
+		headers: {},
+		*/
+
+		accepts: {
+			"*": allTypes,
+			text: "text/plain",
+			html: "text/html",
+			xml: "application/xml, text/xml",
+			json: "application/json, text/javascript"
+		},
+
+		contents: {
+			xml: /xml/,
+			html: /html/,
+			json: /json/
+		},
+
+		responseFields: {
+			xml: "responseXML",
+			text: "responseText",
+			json: "responseJSON"
+		},
+
+		// Data converters
+		// Keys separate source (or catchall "*") and destination types with a single space
+		converters: {
+
+			// Convert anything to text
+			"* text": String,
+
+			// Text to html (true = no transformation)
+			"text html": true,
+
+			// Evaluate text as a json expression
+			"text json": jQuery.parseJSON,
+
+			// Parse text as xml
+			"text xml": jQuery.parseXML
+		},
+
+		// For options that shouldn't be deep extended:
+		// you can add your own custom options here if
+		// and when you create one that shouldn't be
+		// deep extended (see ajaxExtend)
+		flatOptions: {
+			url: true,
+			context: true
+		}
+	},
+
+	// Creates a full fledged settings object into target
+	// with both ajaxSettings and settings fields.
+	// If target is omitted, writes into ajaxSettings.
+	ajaxSetup: function( target, settings ) {
+		return settings ?
+
+			// Building a settings object
+			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :
+
+			// Extending ajaxSettings
+			ajaxExtend( jQuery.ajaxSettings, target );
+	},
+
+	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
+	ajaxTransport: addToPrefiltersOrTransports( transports ),
+
+	// Main method
+	ajax: function( url, options ) {
+
+		// If url is an object, simulate pre-1.5 signature
+		if ( typeof url === "object" ) {
+			options = url;
+			url = undefined;
+		}
+
+		// Force options to be an object
+		options = options || {};
+
+		var transport,
+			// URL without anti-cache param
+			cacheURL,
+			// Response headers
+			responseHeadersString,
+			responseHeaders,
+			// timeout handle
+			timeoutTimer,
+			// Cross-domain detection vars
+			parts,
+			// To know if global events are to be dispatched
+			fireGlobals,
+			// Loop variable
+			i,
+			// Create the final options object
+			s = jQuery.ajaxSetup( {}, options ),
+			// Callbacks context
+			callbackContext = s.context || s,
+			// Context for global events is callbackContext if it is a DOM node or jQuery collection
+			globalEventContext = s.context && ( callbackContext.nodeType || callbackContext.jquery ) ?
+				jQuery( callbackContext ) :
+				jQuery.event,
+			// Deferreds
+			deferred = jQuery.Deferred(),
+			completeDeferred = jQuery.Callbacks("once memory"),
+			// Status-dependent callbacks
+			statusCode = s.statusCode || {},
+			// Headers (they are sent all at once)
+			requestHeaders = {},
+			requestHeadersNames = {},
+			// The jqXHR state
+			state = 0,
+			// Default abort message
+			strAbort = "canceled",
+			// Fake xhr
+			jqXHR = {
+				readyState: 0,
+
+				// Builds headers hashtable if needed
+				getResponseHeader: function( key ) {
+					var match;
+					if ( state === 2 ) {
+						if ( !responseHeaders ) {
+							responseHeaders = {};
+							while ( (match = rheaders.exec( responseHeadersString )) ) {
+								responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
+							}
+						}
+						match = responseHeaders[ key.toLowerCase() ];
+					}
+					return match == null ? null : match;
+				},
+
+				// Raw string
+				getAllResponseHeaders: function() {
+					return state === 2 ? responseHeadersString : null;
+				},
+
+				// Caches the header
+				setRequestHeader: function( name, value ) {
+					var lname = name.toLowerCase();
+					if ( !state ) {
+						name = requestHeadersNames[ lname ] = requestHeadersNames[ lname ] || name;
+						requestHeaders[ name ] = value;
+					}
+					return this;
+				},
+
+				// Overrides response content-type header
+				overrideMimeType: function( type ) {
+					if ( !state ) {
+						s.mimeType = type;
+					}
+					return this;
+				},
+
+				// Status-dependent callbacks
+				statusCode: function( map ) {
+					var code;
+					if ( map ) {
+						if ( state < 2 ) {
+							for ( code in map ) {
+								// Lazy-add the new callback in a way that preserves old ones
+								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
+							}
+						} else {
+							// Execute the appropriate callbacks
+							jqXHR.always( map[ jqXHR.status ] );
+						}
+					}
+					return this;
+				},
+
+				// Cancel the request
+				abort: function( statusText ) {
+					var finalText = statusText || strAbort;
+					if ( transport ) {
+						transport.abort( finalText );
+					}
+					done( 0, finalText );
+					return this;
+				}
+			};
+
+		// Attach deferreds
+		deferred.promise( jqXHR ).complete = completeDeferred.add;
+		jqXHR.success = jqXHR.done;
+		jqXHR.error = jqXHR.fail;
+
+		// Remove hash character (#7531: and string promotion)
+		// Add protocol if not provided (prefilters might expect it)
+		// Handle falsy url in the settings object (#10093: consistency with old signature)
+		// We also use the url parameter if available
+		s.url = ( ( url || s.url || ajaxLocation ) + "" ).replace( rhash, "" )
+			.replace( rprotocol, ajaxLocParts[ 1 ] + "//" );
+
+		// Alias method option to type as per ticket #12004
+		s.type = options.method || options.type || s.method || s.type;
+
+		// Extract dataTypes list
+		s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().match( rnotwhite ) || [ "" ];
+
+		// A cross-domain request is in order when we have a protocol:host:port mismatch
+		if ( s.crossDomain == null ) {
+			parts = rurl.exec( s.url.toLowerCase() );
+			s.crossDomain = !!( parts &&
+				( parts[ 1 ] !== ajaxLocParts[ 1 ] || parts[ 2 ] !== ajaxLocParts[ 2 ] ||
+					( parts[ 3 ] || ( parts[ 1 ] === "http:" ? "80" : "443" ) ) !==
+						( ajaxLocParts[ 3 ] || ( ajaxLocParts[ 1 ] === "http:" ? "80" : "443" ) ) )
+			);
+		}
+
+		// Convert data if not already a string
+		if ( s.data && s.processData && typeof s.data !== "string" ) {
+			s.data = jQuery.param( s.data, s.traditional );
+		}
+
+		// Apply prefilters
+		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
+
+		// If request was aborted inside a prefilter, stop there
+		if ( state === 2 ) {
+			return jqXHR;
+		}
+
+		// We can fire global events as of now if asked to
+		// Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)
+		fireGlobals = jQuery.event && s.global;
+
+		// Watch for a new set of requests
+		if ( fireGlobals && jQuery.active++ === 0 ) {
+			jQuery.event.trigger("ajaxStart");
+		}
+
+		// Uppercase the type
+		s.type = s.type.toUpperCase();
+
+		// Determine if request has content
+		s.hasContent = !rnoContent.test( s.type );
+
+		// Save the URL in case we're toying with the If-Modified-Since
+		// and/or If-None-Match header later on
+		cacheURL = s.url;
+
+		// More options handling for requests with no content
+		if ( !s.hasContent ) {
+
+			// If data is available, append data to url
+			if ( s.data ) {
+				cacheURL = ( s.url += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data );
+				// #9682: remove data so that it's not used in an eventual retry
+				delete s.data;
+			}
+
+			// Add anti-cache in url if needed
+			if ( s.cache === false ) {
+				s.url = rts.test( cacheURL ) ?
+
+					// If there is already a '_' parameter, set its value
+					cacheURL.replace( rts, "$1_=" + nonce++ ) :
+
+					// Otherwise add one to the end
+					cacheURL + ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + nonce++;
+			}
+		}
+
+		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+		if ( s.ifModified ) {
+			if ( jQuery.lastModified[ cacheURL ] ) {
+				jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
+			}
+			if ( jQuery.etag[ cacheURL ] ) {
+				jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
+			}
+		}
+
+		// Set the correct header, if data is being sent
+		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
+			jqXHR.setRequestHeader( "Content-Type", s.contentType );
+		}
+
+		// Set the Accepts header for the server, depending on the dataType
+		jqXHR.setRequestHeader(
+			"Accept",
+			s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
+				s.accepts[ s.dataTypes[0] ] + ( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
+				s.accepts[ "*" ]
+		);
+
+		// Check for headers option
+		for ( i in s.headers ) {
+			jqXHR.setRequestHeader( i, s.headers[ i ] );
+		}
+
+		// Allow custom headers/mimetypes and early abort
+		if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
+			// Abort if not done already and return
+			return jqXHR.abort();
+		}
+
+		// Aborting is no longer a cancellation
+		strAbort = "abort";
+
+		// Install callbacks on deferreds
+		for ( i in { success: 1, error: 1, complete: 1 } ) {
+			jqXHR[ i ]( s[ i ] );
+		}
+
+		// Get transport
+		transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
+
+		// If no transport, we auto-abort
+		if ( !transport ) {
+			done( -1, "No Transport" );
+		} else {
+			jqXHR.readyState = 1;
+
+			// Send global event
+			if ( fireGlobals ) {
+				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
+			}
+			// Timeout
+			if ( s.async && s.timeout > 0 ) {
+				timeoutTimer = setTimeout(function() {
+					jqXHR.abort("timeout");
+				}, s.timeout );
+			}
+
+			try {
+				state = 1;
+				transport.send( requestHeaders, done );
+			} catch ( e ) {
+				// Propagate exception as error if not done
+				if ( state < 2 ) {
+					done( -1, e );
+				// Simply rethrow otherwise
+				} else {
+					throw e;
+				}
+			}
+		}
+
+		// Callback for when everything is done
+		function done( status, nativeStatusText, responses, headers ) {
+			var isSuccess, success, error, response, modified,
+				statusText = nativeStatusText;
+
+			// Called once
+			if ( state === 2 ) {
+				return;
+			}
+
+			// State is "done" now
+			state = 2;
+
+			// Clear timeout if it exists
+			if ( timeoutTimer ) {
+				clearTimeout( timeoutTimer );
+			}
+
+			// Dereference transport for early garbage collection
+			// (no matter how long the jqXHR object will be used)
+			transport = undefined;
+
+			// Cache response headers
+			responseHeadersString = headers || "";
+
+			// Set readyState
+			jqXHR.readyState = status > 0 ? 4 : 0;
+
+			// Determine if successful
+			isSuccess = status >= 200 && status < 300 || status === 304;
+
+			// Get response data
+			if ( responses ) {
+				response = ajaxHandleResponses( s, jqXHR, responses );
+			}
+
+			// Convert no matter what (that way responseXXX fields are always set)
+			response = ajaxConvert( s, response, jqXHR, isSuccess );
+
+			// If successful, handle type chaining
+			if ( isSuccess ) {
+
+				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+				if ( s.ifModified ) {
+					modified = jqXHR.getResponseHeader("Last-Modified");
+					if ( modified ) {
+						jQuery.lastModified[ cacheURL ] = modified;
+					}
+					modified = jqXHR.getResponseHeader("etag");
+					if ( modified ) {
+						jQuery.etag[ cacheURL ] = modified;
+					}
+				}
+
+				// if no content
+				if ( status === 204 || s.type === "HEAD" ) {
+					statusText = "nocontent";
+
+				// if not modified
+				} else if ( status === 304 ) {
+					statusText = "notmodified";
+
+				// If we have data, let's convert it
+				} else {
+					statusText = response.state;
+					success = response.data;
+					error = response.error;
+					isSuccess = !error;
+				}
+			} else {
+				// Extract error from statusText and normalize for non-aborts
+				error = statusText;
+				if ( status || !statusText ) {
+					statusText = "error";
+					if ( status < 0 ) {
+						status = 0;
+					}
+				}
+			}
+
+			// Set data for the fake xhr object
+			jqXHR.status = status;
+			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
+
+			// Success/Error
+			if ( isSuccess ) {
+				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
+			} else {
+				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
+			}
+
+			// Status-dependent callbacks
+			jqXHR.statusCode( statusCode );
+			statusCode = undefined;
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
+					[ jqXHR, s, isSuccess ? success : error ] );
+			}
+
+			// Complete
+			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
+				// Handle the global AJAX counter
+				if ( !( --jQuery.active ) ) {
+					jQuery.event.trigger("ajaxStop");
+				}
+			}
+		}
+
+		return jqXHR;
+	},
+
+	getJSON: function( url, data, callback ) {
+		return jQuery.get( url, data, callback, "json" );
+	},
+
+	getScript: function( url, callback ) {
+		return jQuery.get( url, undefined, callback, "script" );
+	}
+});
+
+jQuery.each( [ "get", "post" ], function( i, method ) {
+	jQuery[ method ] = function( url, data, callback, type ) {
+		// Shift arguments if data argument was omitted
+		if ( jQuery.isFunction( data ) ) {
+			type = type || callback;
+			callback = data;
+			data = undefined;
+		}
+
+		return jQuery.ajax({
+			url: url,
+			type: method,
+			dataType: type,
+			data: data,
+			success: callback
+		});
+	};
+});
+
+
+jQuery._evalUrl = function( url ) {
+	return jQuery.ajax({
+		url: url,
+		type: "GET",
+		dataType: "script",
+		async: false,
+		global: false,
+		"throws": true
+	});
+};
+
+
+jQuery.fn.extend({
+	wrapAll: function( html ) {
+		var wrap;
+
+		if ( jQuery.isFunction( html ) ) {
+			return this.each(function( i ) {
+				jQuery( this ).wrapAll( html.call(this, i) );
+			});
+		}
+
+		if ( this[ 0 ] ) {
+
+			// The elements to wrap the target around
+			wrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );
+
+			if ( this[ 0 ].parentNode ) {
+				wrap.insertBefore( this[ 0 ] );
+			}
+
+			wrap.map(function() {
+				var elem = this;
+
+				while ( elem.firstElementChild ) {
+					elem = elem.firstElementChild;
+				}
+
+				return elem;
+			}).append( this );
+		}
+
+		return this;
+	},
+
+	wrapInner: function( html ) {
+		if ( jQuery.isFunction( html ) ) {
+			return this.each(function( i ) {
+				jQuery( this ).wrapInner( html.call(this, i) );
+			});
+		}
+
+		return this.each(function() {
+			var self = jQuery( this ),
+				contents = self.contents();
+
+			if ( contents.length ) {
+				contents.wrapAll( html );
+
+			} else {
+				self.append( html );
+			}
+		});
+	},
+
+	wrap: function( html ) {
+		var isFunction = jQuery.isFunction( html );
+
+		return this.each(function( i ) {
+			jQuery( this ).wrapAll( isFunction ? html.call(this, i) : html );
+		});
+	},
+
+	unwrap: function() {
+		return this.parent().each(function() {
+			if ( !jQuery.nodeName( this, "body" ) ) {
+				jQuery( this ).replaceWith( this.childNodes );
+			}
+		}).end();
+	}
+});
+
+
+jQuery.expr.filters.hidden = function( elem ) {
+	// Support: Opera <= 12.12
+	// Opera reports offsetWidths and offsetHeights less than zero on some elements
+	return elem.offsetWidth <= 0 && elem.offsetHeight <= 0;
+};
+jQuery.expr.filters.visible = function( elem ) {
+	return !jQuery.expr.filters.hidden( elem );
+};
+
+
+
+
+var r20 = /%20/g,
+	rbracket = /\[\]$/,
+	rCRLF = /\r?\n/g,
+	rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
+	rsubmittable = /^(?:input|select|textarea|keygen)/i;
+
+function buildParams( prefix, obj, traditional, add ) {
+	var name;
+
+	if ( jQuery.isArray( obj ) ) {
+		// Serialize array item.
+		jQuery.each( obj, function( i, v ) {
+			if ( traditional || rbracket.test( prefix ) ) {
+				// Treat each array item as a scalar.
+				add( prefix, v );
+
+			} else {
+				// Item is non-scalar (array or object), encode its numeric index.
+				buildParams( prefix + "[" + ( typeof v === "object" ? i : "" ) + "]", v, traditional, add );
+			}
+		});
+
+	} else if ( !traditional && jQuery.type( obj ) === "object" ) {
+		// Serialize object item.
+		for ( name in obj ) {
+			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
+		}
+
+	} else {
+		// Serialize scalar item.
+		add( prefix, obj );
+	}
+}
+
+// Serialize an array of form elements or a set of
+// key/values into a query string
+jQuery.param = function( a, traditional ) {
+	var prefix,
+		s = [],
+		add = function( key, value ) {
+			// If value is a function, invoke it and return its value
+			value = jQuery.isFunction( value ) ? value() : ( value == null ? "" : value );
+			s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
+		};
+
+	// Set traditional to true for jQuery <= 1.3.2 behavior.
+	if ( traditional === undefined ) {
+		traditional = jQuery.ajaxSettings && jQuery.ajaxSettings.traditional;
+	}
+
+	// If an array was passed in, assume that it is an array of form elements.
+	if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
+		// Serialize the form elements
+		jQuery.each( a, function() {
+			add( this.name, this.value );
+		});
+
+	} else {
+		// If traditional, encode the "old" way (the way 1.3.2 or older
+		// did it), otherwise encode params recursively.
+		for ( prefix in a ) {
+			buildParams( prefix, a[ prefix ], traditional, add );
+		}
+	}
+
+	// Return the resulting serialization
+	return s.join( "&" ).replace( r20, "+" );
+};
+
+jQuery.fn.extend({
+	serialize: function() {
+		return jQuery.param( this.serializeArray() );
+	},
+	serializeArray: function() {
+		return this.map(function() {
+			// Can add propHook for "elements" to filter or add form elements
+			var elements = jQuery.prop( this, "elements" );
+			return elements ? jQuery.makeArray( elements ) : this;
+		})
+		.filter(function() {
+			var type = this.type;
+
+			// Use .is( ":disabled" ) so that fieldset[disabled] works
+			return this.name && !jQuery( this ).is( ":disabled" ) &&
+				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
+				( this.checked || !rcheckableType.test( type ) );
+		})
+		.map(function( i, elem ) {
+			var val = jQuery( this ).val();
+
+			return val == null ?
+				null :
+				jQuery.isArray( val ) ?
+					jQuery.map( val, function( val ) {
+						return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
+					}) :
+					{ name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
+		}).get();
+	}
+});
+
+
+jQuery.ajaxSettings.xhr = function() {
+	try {
+		return new XMLHttpRequest();
+	} catch( e ) {}
+};
+
+var xhrId = 0,
+	xhrCallbacks = {},
+	xhrSuccessStatus = {
+		// file protocol always yields status code 0, assume 200
+		0: 200,
+		// Support: IE9
+		// #1450: sometimes IE returns 1223 when it should be 204
+		1223: 204
+	},
+	xhrSupported = jQuery.ajaxSettings.xhr();
+
+// Support: IE9
+// Open requests must be manually aborted on unload (#5280)
+// See https://support.microsoft.com/kb/2856746 for more info
+if ( window.attachEvent ) {
+	window.attachEvent( "onunload", function() {
+		for ( var key in xhrCallbacks ) {
+			xhrCallbacks[ key ]();
+		}
+	});
+}
+
+support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
+support.ajax = xhrSupported = !!xhrSupported;
+
+jQuery.ajaxTransport(function( options ) {
+	var callback;
+
+	// Cross domain only allowed if supported through XMLHttpRequest
+	if ( support.cors || xhrSupported && !options.crossDomain ) {
+		return {
+			send: function( headers, complete ) {
+				var i,
+					xhr = options.xhr(),
+					id = ++xhrId;
+
+				xhr.open( options.type, options.url, options.async, options.username, options.password );
+
+				// Apply custom fields if provided
+				if ( options.xhrFields ) {
+					for ( i in options.xhrFields ) {
+						xhr[ i ] = options.xhrFields[ i ];
+					}
+				}
+
+				// Override mime type if needed
+				if ( options.mimeType && xhr.overrideMimeType ) {
+					xhr.overrideMimeType( options.mimeType );
+				}
+
+				// X-Requested-With header
+				// For cross-domain requests, seeing as conditions for a preflight are
+				// akin to a jigsaw puzzle, we simply never set it to be sure.
+				// (it can always be set on a per-request basis or even using ajaxSetup)
+				// For same-domain requests, won't change header if already provided.
+				if ( !options.crossDomain && !headers["X-Requested-With"] ) {
+					headers["X-Requested-With"] = "XMLHttpRequest";
+				}
+
+				// Set headers
+				for ( i in headers ) {
+					xhr.setRequestHeader( i, headers[ i ] );
+				}
+
+				// Callback
+				callback = function( type ) {
+					return function() {
+						if ( callback ) {
+							delete xhrCallbacks[ id ];
+							callback = xhr.onload = xhr.onerror = null;
+
+							if ( type === "abort" ) {
+								xhr.abort();
+							} else if ( type === "error" ) {
+								complete(
+									// file: protocol always yields status 0; see #8605, #14207
+									xhr.status,
+									xhr.statusText
+								);
+							} else {
+								complete(
+									xhrSuccessStatus[ xhr.status ] || xhr.status,
+									xhr.statusText,
+									// Support: IE9
+									// Accessing binary-data responseText throws an exception
+									// (#11426)
+									typeof xhr.responseText === "string" ? {
+										text: xhr.responseText
+									} : undefined,
+									xhr.getAllResponseHeaders()
+								);
+							}
+						}
+					};
+				};
+
+				// Listen to events
+				xhr.onload = callback();
+				xhr.onerror = callback("error");
+
+				// Create the abort callback
+				callback = xhrCallbacks[ id ] = callback("abort");
+
+				try {
+					// Do send the request (this may raise an exception)
+					xhr.send( options.hasContent && options.data || null );
+				} catch ( e ) {
+					// #14683: Only rethrow if this hasn't been notified as an error yet
+					if ( callback ) {
+						throw e;
+					}
+				}
+			},
+
+			abort: function() {
+				if ( callback ) {
+					callback();
+				}
+			}
+		};
+	}
+});
+
+
+
+
+// Install script dataType
+jQuery.ajaxSetup({
+	accepts: {
+		script: "text/javascript, application/javascript, application/ecmascript, application/x-ecmascript"
+	},
+	contents: {
+		script: /(?:java|ecma)script/
+	},
+	converters: {
+		"text script": function( text ) {
+			jQuery.globalEval( text );
+			return text;
+		}
+	}
+});
+
+// Handle cache's special case and crossDomain
+jQuery.ajaxPrefilter( "script", function( s ) {
+	if ( s.cache === undefined ) {
+		s.cache = false;
+	}
+	if ( s.crossDomain ) {
+		s.type = "GET";
+	}
+});
+
+// Bind script tag hack transport
+jQuery.ajaxTransport( "script", function( s ) {
+	// This transport only deals with cross domain requests
+	if ( s.crossDomain ) {
+		var script, callback;
+		return {
+			send: function( _, complete ) {
+				script = jQuery("<script>").prop({
+					async: true,
+					charset: s.scriptCharset,
+					src: s.url
+				}).on(
+					"load error",
+					callback = function( evt ) {
+						script.remove();
+						callback = null;
+						if ( evt ) {
+							complete( evt.type === "error" ? 404 : 200, evt.type );
+						}
+					}
+				);
+				document.head.appendChild( script[ 0 ] );
+			},
+			abort: function() {
+				if ( callback ) {
+					callback();
+				}
+			}
+		};
+	}
+});
+
+
+
+
+var oldCallbacks = [],
+	rjsonp = /(=)\?(?=&|$)|\?\?/;
+
+// Default jsonp settings
+jQuery.ajaxSetup({
+	jsonp: "callback",
+	jsonpCallback: function() {
+		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
+		this[ callback ] = true;
+		return callback;
+	}
+});
+
+// Detect, normalize options and install callbacks for jsonp requests
+jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
+
+	var callbackName, overwritten, responseContainer,
+		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
+			"url" :
+			typeof s.data === "string" && !( s.contentType || "" ).indexOf("application/x-www-form-urlencoded") && rjsonp.test( s.data ) && "data"
+		);
+
+	// Handle iff the expected data type is "jsonp" or we have a parameter to set
+	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
+
+		// Get callback name, remembering preexisting value associated with it
+		callbackName = s.jsonpCallback = jQuery.isFunction( s.jsonpCallback ) ?
+			s.jsonpCallback() :
+			s.jsonpCallback;
+
+		// Insert callback into url or form data
+		if ( jsonProp ) {
+			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
+		} else if ( s.jsonp !== false ) {
+			s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
+		}
+
+		// Use data converter to retrieve json after script execution
+		s.converters["script json"] = function() {
+			if ( !responseContainer ) {
+				jQuery.error( callbackName + " was not called" );
+			}
+			return responseContainer[ 0 ];
+		};
+
+		// force json dataType
+		s.dataTypes[ 0 ] = "json";
+
+		// Install callback
+		overwritten = window[ callbackName ];
+		window[ callbackName ] = function() {
+			responseContainer = arguments;
+		};
+
+		// Clean-up function (fires after converters)
+		jqXHR.always(function() {
+			// Restore preexisting value
+			window[ callbackName ] = overwritten;
+
+			// Save back as free
+			if ( s[ callbackName ] ) {
+				// make sure that re-using the options doesn't screw things around
+				s.jsonpCallback = originalSettings.jsonpCallback;
+
+				// save the callback name for future use
+				oldCallbacks.push( callbackName );
+			}
+
+			// Call if it was a function and we have a response
+			if ( responseContainer && jQuery.isFunction( overwritten ) ) {
+				overwritten( responseContainer[ 0 ] );
+			}
+
+			responseContainer = overwritten = undefined;
+		});
+
+		// Delegate to script
+		return "script";
+	}
+});
+
+
+
+
+// data: string of html
+// context (optional): If specified, the fragment will be created in this context, defaults to document
+// keepScripts (optional): If true, will include scripts passed in the html string
+jQuery.parseHTML = function( data, context, keepScripts ) {
+	if ( !data || typeof data !== "string" ) {
+		return null;
+	}
+	if ( typeof context === "boolean" ) {
+		keepScripts = context;
+		context = false;
+	}
+	context = context || document;
+
+	var parsed = rsingleTag.exec( data ),
+		scripts = !keepScripts && [];
+
+	// Single tag
+	if ( parsed ) {
+		return [ context.createElement( parsed[1] ) ];
+	}
+
+	parsed = jQuery.buildFragment( [ data ], context, scripts );
+
+	if ( scripts && scripts.length ) {
+		jQuery( scripts ).remove();
+	}
+
+	return jQuery.merge( [], parsed.childNodes );
+};
+
+
+// Keep a copy of the old load method
+var _load = jQuery.fn.load;
+
+/**
+ * Load a url into a page
+ */
+jQuery.fn.load = function( url, params, callback ) {
+	if ( typeof url !== "string" && _load ) {
+		return _load.apply( this, arguments );
+	}
+
+	var selector, type, response,
+		self = this,
+		off = url.indexOf(" ");
+
+	if ( off >= 0 ) {
+		selector = jQuery.trim( url.slice( off ) );
+		url = url.slice( 0, off );
+	}
+
+	// If it's a function
+	if ( jQuery.isFunction( params ) ) {
+
+		// We assume that it's the callback
+		callback = params;
+		params = undefined;
+
+	// Otherwise, build a param string
+	} else if ( params && typeof params === "object" ) {
+		type = "POST";
+	}
+
+	// If we have elements to modify, make the request
+	if ( self.length > 0 ) {
+		jQuery.ajax({
+			url: url,
+
+			// if "type" variable is undefined, then "GET" method will be used
+			type: type,
+			dataType: "html",
+			data: params
+		}).done(function( responseText ) {
+
+			// Save response for use in complete callback
+			response = arguments;
+
+			self.html( selector ?
+
+				// If a selector was specified, locate the right elements in a dummy div
+				// Exclude scripts to avoid IE 'Permission Denied' errors
+				jQuery("<div>").append( jQuery.parseHTML( responseText ) ).find( selector ) :
+
+				// Otherwise use the full result
+				responseText );
+
+		}).complete( callback && function( jqXHR, status ) {
+			self.each( callback, response || [ jqXHR.responseText, status, jqXHR ] );
+		});
+	}
+
+	return this;
+};
+
+
+
+
+// Attach a bunch of functions for handling common AJAX events
+jQuery.each( [ "ajaxStart", "ajaxStop", "ajaxComplete", "ajaxError", "ajaxSuccess", "ajaxSend" ], function( i, type ) {
+	jQuery.fn[ type ] = function( fn ) {
+		return this.on( type, fn );
+	};
+});
+
+
+
+
+jQuery.expr.filters.animated = function( elem ) {
+	return jQuery.grep(jQuery.timers, function( fn ) {
+		return elem === fn.elem;
+	}).length;
+};
+
+
+
+
+var docElem = window.document.documentElement;
+
+/**
+ * Gets a window from an element
+ */
+function getWindow( elem ) {
+	return jQuery.isWindow( elem ) ? elem : elem.nodeType === 9 && elem.defaultView;
+}
+
+jQuery.offset = {
+	setOffset: function( elem, options, i ) {
+		var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
+			position = jQuery.css( elem, "position" ),
+			curElem = jQuery( elem ),
+			props = {};
+
+		// Set position first, in-case top/left are set even on static elem
+		if ( position === "static" ) {
+			elem.style.position = "relative";
+		}
+
+		curOffset = curElem.offset();
+		curCSSTop = jQuery.css( elem, "top" );
+		curCSSLeft = jQuery.css( elem, "left" );
+		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
+			( curCSSTop + curCSSLeft ).indexOf("auto") > -1;
+
+		// Need to be able to calculate position if either
+		// top or left is auto and position is either absolute or fixed
+		if ( calculatePosition ) {
+			curPosition = curElem.position();
+			curTop = curPosition.top;
+			curLeft = curPosition.left;
+
+		} else {
+			curTop = parseFloat( curCSSTop ) || 0;
+			curLeft = parseFloat( curCSSLeft ) || 0;
+		}
+
+		if ( jQuery.isFunction( options ) ) {
+			options = options.call( elem, i, curOffset );
+		}
+
+		if ( options.top != null ) {
+			props.top = ( options.top - curOffset.top ) + curTop;
+		}
+		if ( options.left != null ) {
+			props.left = ( options.left - curOffset.left ) + curLeft;
+		}
+
+		if ( "using" in options ) {
+			options.using.call( elem, props );
+
+		} else {
+			curElem.css( props );
+		}
+	}
+};
+
+jQuery.fn.extend({
+	offset: function( options ) {
+		if ( arguments.length ) {
+			return options === undefined ?
+				this :
+				this.each(function( i ) {
+					jQuery.offset.setOffset( this, options, i );
+				});
+		}
+
+		var docElem, win,
+			elem = this[ 0 ],
+			box = { top: 0, left: 0 },
+			doc = elem && elem.ownerDocument;
+
+		if ( !doc ) {
+			return;
+		}
+
+		docElem = doc.documentElement;
+
+		// Make sure it's not a disconnected DOM node
+		if ( !jQuery.contains( docElem, elem ) ) {
+			return box;
+		}
+
+		// Support: BlackBerry 5, iOS 3 (original iPhone)
+		// If we don't have gBCR, just use 0,0 rather than error
+		if ( typeof elem.getBoundingClientRect !== strundefined ) {
+			box = elem.getBoundingClientRect();
+		}
+		win = getWindow( doc );
+		return {
+			top: box.top + win.pageYOffset - docElem.clientTop,
+			left: box.left + win.pageXOffset - docElem.clientLeft
+		};
+	},
+
+	position: function() {
+		if ( !this[ 0 ] ) {
+			return;
+		}
+
+		var offsetParent, offset,
+			elem = this[ 0 ],
+			parentOffset = { top: 0, left: 0 };
+
+		// Fixed elements are offset from window (parentOffset = {top:0, left: 0}, because it is its only offset parent
+		if ( jQuery.css( elem, "position" ) === "fixed" ) {
+			// Assume getBoundingClientRect is there when computed position is fixed
+			offset = elem.getBoundingClientRect();
+
+		} else {
+			// Get *real* offsetParent
+			offsetParent = this.offsetParent();
+
+			// Get correct offsets
+			offset = this.offset();
+			if ( !jQuery.nodeName( offsetParent[ 0 ], "html" ) ) {
+				parentOffset = offsetParent.offset();
+			}
+
+			// Add offsetParent borders
+			parentOffset.top += jQuery.css( offsetParent[ 0 ], "borderTopWidth", true );
+			parentOffset.left += jQuery.css( offsetParent[ 0 ], "borderLeftWidth", true );
+		}
+
+		// Subtract parent offsets and element margins
+		return {
+			top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
+			left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
+		};
+	},
+
+	offsetParent: function() {
+		return this.map(function() {
+			var offsetParent = this.offsetParent || docElem;
+
+			while ( offsetParent && ( !jQuery.nodeName( offsetParent, "html" ) && jQuery.css( offsetParent, "position" ) === "static" ) ) {
+				offsetParent = offsetParent.offsetParent;
+			}
+
+			return offsetParent || docElem;
+		});
+	}
+});
+
+// Create scrollLeft and scrollTop methods
+jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
+	var top = "pageYOffset" === prop;
+
+	jQuery.fn[ method ] = function( val ) {
+		return access( this, function( elem, method, val ) {
+			var win = getWindow( elem );
+
+			if ( val === undefined ) {
+				return win ? win[ prop ] : elem[ method ];
+			}
+
+			if ( win ) {
+				win.scrollTo(
+					!top ? val : window.pageXOffset,
+					top ? val : window.pageYOffset
+				);
+
+			} else {
+				elem[ method ] = val;
+			}
+		}, method, val, arguments.length, null );
+	};
+});
+
+// Support: Safari<7+, Chrome<37+
+// Add the top/left cssHooks using jQuery.fn.position
+// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
+// Blink bug: https://code.google.com/p/chromium/issues/detail?id=229280
+// getComputedStyle returns percent when specified for top/left/bottom/right;
+// rather than make the css module depend on the offset module, just check for it here
+jQuery.each( [ "top", "left" ], function( i, prop ) {
+	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
+		function( elem, computed ) {
+			if ( computed ) {
+				computed = curCSS( elem, prop );
+				// If curCSS returns percentage, fallback to offset
+				return rnumnonpx.test( computed ) ?
+					jQuery( elem ).position()[ prop ] + "px" :
+					computed;
+			}
+		}
+	);
+});
+
+
+// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
+jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
+	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name }, function( defaultExtra, funcName ) {
+		// Margin is only for outerHeight, outerWidth
+		jQuery.fn[ funcName ] = function( margin, value ) {
+			var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
+				extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );
+
+			return access( this, function( elem, type, value ) {
+				var doc;
+
+				if ( jQuery.isWindow( elem ) ) {
+					// As of 5/8/2012 this will yield incorrect results for Mobile Safari, but there
+					// isn't a whole lot we can do. See pull request at this URL for discussion:
+					// https://github.com/jquery/jquery/pull/764
+					return elem.document.documentElement[ "client" + name ];
+				}
+
+				// Get document width or height
+				if ( elem.nodeType === 9 ) {
+					doc = elem.documentElement;
+
+					// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],
+					// whichever is greatest
+					return Math.max(
+						elem.body[ "scroll" + name ], doc[ "scroll" + name ],
+						elem.body[ "offset" + name ], doc[ "offset" + name ],
+						doc[ "client" + name ]
+					);
+				}
+
+				return value === undefined ?
+					// Get width or height on the element, requesting but not forcing parseFloat
+					jQuery.css( elem, type, extra ) :
+
+					// Set width or height on the element
+					jQuery.style( elem, type, value, extra );
+			}, type, chainable ? margin : undefined, chainable, null );
+		};
+	});
+});
+
+
+// The number of elements contained in the matched element set
+jQuery.fn.size = function() {
+	return this.length;
+};
+
+jQuery.fn.andSelf = jQuery.fn.addBack;
+
+
+
+
+// Register as a named AMD module, since jQuery can be concatenated with other
+// files that may use define, but not via a proper concatenation script that
+// understands anonymous AMD modules. A named AMD is safest and most robust
+// way to register. Lowercase jquery is used because AMD module names are
+// derived from file names, and jQuery is normally delivered in a lowercase
+// file name. Do this after creating the global so that if an AMD module wants
+// to call noConflict to hide this version of jQuery, it will work.
+
+// Note that for maximum portability, libraries that are not jQuery should
+// declare themselves as anonymous modules, and avoid setting a global if an
+// AMD loader is present. jQuery is a special case. For more information, see
+// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
+
+if ( typeof define === "function" && define.amd ) {
+	define( "jquery", [], function() {
+		return jQuery;
+	});
+}
+
+
+
+
+var
+	// Map over jQuery in case of overwrite
+	_jQuery = window.jQuery,
+
+	// Map over the $ in case of overwrite
+	_$ = window.$;
+
+jQuery.noConflict = function( deep ) {
+	if ( window.$ === jQuery ) {
+		window.$ = _$;
+	}
+
+	if ( deep && window.jQuery === jQuery ) {
+		window.jQuery = _jQuery;
+	}
+
+	return jQuery;
+};
+
+// Expose jQuery and $ identifiers, even in AMD
+// (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
+// and CommonJS for browser emulators (#13566)
+if ( typeof noGlobal === strundefined ) {
+	window.jQuery = window.$ = jQuery;
+}
+
+
+
+
+return jQuery;
+
+}));
diff --git a/interface/static/admin/js/vendor/jquery/jquery.min.js b/interface/static/admin/js/vendor/jquery/jquery.min.js
new file mode 100644
index 0000000..49990d6
--- /dev/null
+++ b/interface/static/admin/js/vendor/jquery/jquery.min.js
@@ -0,0 +1,4 @@
+/*! jQuery v2.1.4 | (c) 2005, 2015 jQuery Foundation, Inc. | jquery.org/license */
+!function(a,b){"object"==typeof module&&"object"==typeof module.exports?module.exports=a.document?b(a,!0):function(a){if(!a.document)throw new Error("jQuery requires a window with a document");return b(a)}:b(a)}("undefined"!=typeof window?window:this,function(a,b){var c=[],d=c.slice,e=c.concat,f=c.push,g=c.indexOf,h={},i=h.toString,j=h.hasOwnProperty,k={},l=a.document,m="2.1.4",n=function(a,b){return new n.fn.init(a,b)},o=/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,p=/^-ms-/,q=/-([\da-z])/gi,r=function(a,b){return b.toUpperCase()};n.fn=n.prototype={jquery:m,constructor:n,selector:"",length:0,toArray:function(){return d.call(this)},get:function(a){return null!=a?0>a?this[a+this.length]:this[a]:d.call(this)},pushStack:function(a){var b=n.merge(this.constructor(),a);return b.prevObject=this,b.context=this.context,b},each:function(a,b){return n.each(this,a,b)},map:function(a){return this.pushStack(n.map(this,function(b,c){return a.call(b,c,b)}))},slice:function(){return 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diff --git a/interface/static/admin/js/vendor/xregexp/LICENSE-XREGEXP.txt b/interface/static/admin/js/vendor/xregexp/LICENSE-XREGEXP.txt
new file mode 100644
index 0000000..341652a
--- /dev/null
+++ b/interface/static/admin/js/vendor/xregexp/LICENSE-XREGEXP.txt
@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2007-2012 Steven Levithan <http://xregexp.com/>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/interface/static/admin/js/vendor/xregexp/xregexp.min.js b/interface/static/admin/js/vendor/xregexp/xregexp.min.js
new file mode 100644
index 0000000..a190558
--- /dev/null
+++ b/interface/static/admin/js/vendor/xregexp/xregexp.min.js
@@ -0,0 +1,18 @@
+//XRegExp 2.0.0 <xregexp.com> MIT License
+var XRegExp;XRegExp=XRegExp||function(n){"use strict";function v(n,i,r){var u;for(u in t.prototype)t.prototype.hasOwnProperty(u)&&(n[u]=t.prototype[u]);return n.xregexp={captureNames:i,isNative:!!r},n}function g(n){return(n.global?"g":"")+(n.ignoreCase?"i":"")+(n.multiline?"m":"")+(n.extended?"x":"")+(n.sticky?"y":"")}function o(n,r,u){if(!t.isRegExp(n))throw new TypeError("type RegExp expected");var f=i.replace.call(g(n)+(r||""),h,"");return u&&(f=i.replace.call(f,new RegExp("["+u+"]+","g"),"")),n=n.xregexp&&!n.xregexp.isNative?v(t(n.source,f),n.xregexp.captureNames?n.xregexp.captureNames.slice(0):null):v(new RegExp(n.source,f),null,!0)}function a(n,t){var i=n.length;if(Array.prototype.lastIndexOf)return n.lastIndexOf(t);while(i--)if(n[i]===t)return i;return-1}function s(n,t){return Object.prototype.toString.call(n).toLowerCase()==="[object "+t+"]"}function d(n){return 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+//XRegExp Unicode Scripts 1.2.0
+(function(n){"use strict";if(!n.addUnicodePackage)throw new ReferenceError("Unicode Base must be loaded before Unicode Scripts");n.install("extensibility"),n.addUnicodePackage({Arabic:"0600-06040606-060B060D-061A061E0620-063F0641-064A0656-065E066A-066F0671-06DC06DE-06FF0750-077F08A008A2-08AC08E4-08FEFB50-FBC1FBD3-FD3DFD50-FD8FFD92-FDC7FDF0-FDFCFE70-FE74FE76-FEFC",Armenian:"0531-05560559-055F0561-0587058A058FFB13-FB17",Balinese:"1B00-1B4B1B50-1B7C",Bamum:"A6A0-A6F7",Batak:"1BC0-1BF31BFC-1BFF",Bengali:"0981-09830985-098C098F09900993-09A809AA-09B009B209B6-09B909BC-09C409C709C809CB-09CE09D709DC09DD09DF-09E309E6-09FB",Bopomofo:"02EA02EB3105-312D31A0-31BA",Braille:"2800-28FF",Buginese:"1A00-1A1B1A1E1A1F",Buhid:"1740-1753",Canadian_Aboriginal:"1400-167F18B0-18F5",Cham:"AA00-AA36AA40-AA4DAA50-AA59AA5C-AA5F",Cherokee:"13A0-13F4",Common:"0000-0040005B-0060007B-00A900AB-00B900BB-00BF00D700F702B9-02DF02E5-02E902EC-02FF0374037E038503870589060C061B061F06400660-066906DD096409650E3F0FD5-0FD810FB16EB-16ED173517361802180318051CD31CE11CE9-1CEC1CEE-1CF31CF51CF62000-200B200E-2064206A-20702074-207E2080-208E20A0-20B92100-21252127-2129212C-21312133-214D214F-215F21892190-23F32400-24262440-244A2460-26FF2701-27FF2900-2B4C2B50-2B592E00-2E3B2FF0-2FFB3000-300430063008-30203030-3037303C-303F309B309C30A030FB30FC3190-319F31C0-31E33220-325F327F-32CF3358-33FF4DC0-4DFFA700-A721A788-A78AA830-A839FD3EFD3FFDFDFE10-FE19FE30-FE52FE54-FE66FE68-FE6BFEFFFF01-FF20FF3B-FF40FF5B-FF65FF70FF9EFF9FFFE0-FFE6FFE8-FFEEFFF9-FFFD",Coptic:"03E2-03EF2C80-2CF32CF9-2CFF",Cyrillic:"0400-04840487-05271D2B1D782DE0-2DFFA640-A697A69F",Devanagari:"0900-09500953-09630966-09770979-097FA8E0-A8FB",Ethiopic:"1200-1248124A-124D1250-12561258125A-125D1260-1288128A-128D1290-12B012B2-12B512B8-12BE12C012C2-12C512C8-12D612D8-13101312-13151318-135A135D-137C1380-13992D80-2D962DA0-2DA62DA8-2DAE2DB0-2DB62DB8-2DBE2DC0-2DC62DC8-2DCE2DD0-2DD62DD8-2DDEAB01-AB06AB09-AB0EAB11-AB16AB20-AB26AB28-AB2E",Georgian:"10A0-10C510C710CD10D0-10FA10FC-10FF2D00-2D252D272D2D",Glagolitic:"2C00-2C2E2C30-2C5E",Greek:"0370-03730375-0377037A-037D038403860388-038A038C038E-03A103A3-03E103F0-03FF1D26-1D2A1D5D-1D611D66-1D6A1DBF1F00-1F151F18-1F1D1F20-1F451F48-1F4D1F50-1F571F591F5B1F5D1F5F-1F7D1F80-1FB41FB6-1FC41FC6-1FD31FD6-1FDB1FDD-1FEF1FF2-1FF41FF6-1FFE2126",Gujarati:"0A81-0A830A85-0A8D0A8F-0A910A93-0AA80AAA-0AB00AB20AB30AB5-0AB90ABC-0AC50AC7-0AC90ACB-0ACD0AD00AE0-0AE30AE6-0AF1",Gurmukhi:"0A01-0A030A05-0A0A0A0F0A100A13-0A280A2A-0A300A320A330A350A360A380A390A3C0A3E-0A420A470A480A4B-0A4D0A510A59-0A5C0A5E0A66-0A75",Han:"2E80-2E992E9B-2EF32F00-2FD5300530073021-30293038-303B3400-4DB54E00-9FCCF900-FA6DFA70-FAD9",Hangul:"1100-11FF302E302F3131-318E3200-321E3260-327EA960-A97CAC00-D7A3D7B0-D7C6D7CB-D7FBFFA0-FFBEFFC2-FFC7FFCA-FFCFFFD2-FFD7FFDA-FFDC",Hanunoo:"1720-1734",Hebrew:"0591-05C705D0-05EA05F0-05F4FB1D-FB36FB38-FB3CFB3EFB40FB41FB43FB44FB46-FB4F",Hiragana:"3041-3096309D-309F",Inherited:"0300-036F04850486064B-0655065F0670095109521CD0-1CD21CD4-1CE01CE2-1CE81CED1CF41DC0-1DE61DFC-1DFF200C200D20D0-20F0302A-302D3099309AFE00-FE0FFE20-FE26",Javanese:"A980-A9CDA9CF-A9D9A9DEA9DF",Kannada:"0C820C830C85-0C8C0C8E-0C900C92-0CA80CAA-0CB30CB5-0CB90CBC-0CC40CC6-0CC80CCA-0CCD0CD50CD60CDE0CE0-0CE30CE6-0CEF0CF10CF2",Katakana:"30A1-30FA30FD-30FF31F0-31FF32D0-32FE3300-3357FF66-FF6FFF71-FF9D",Kayah_Li:"A900-A92F",Khmer:"1780-17DD17E0-17E917F0-17F919E0-19FF",Lao:"0E810E820E840E870E880E8A0E8D0E94-0E970E99-0E9F0EA1-0EA30EA50EA70EAA0EAB0EAD-0EB90EBB-0EBD0EC0-0EC40EC60EC8-0ECD0ED0-0ED90EDC-0EDF",Latin:"0041-005A0061-007A00AA00BA00C0-00D600D8-00F600F8-02B802E0-02E41D00-1D251D2C-1D5C1D62-1D651D6B-1D771D79-1DBE1E00-1EFF2071207F2090-209C212A212B2132214E2160-21882C60-2C7FA722-A787A78B-A78EA790-A793A7A0-A7AAA7F8-A7FFFB00-FB06FF21-FF3AFF41-FF5A",Lepcha:"1C00-1C371C3B-1C491C4D-1C4F",Limbu:"1900-191C1920-192B1930-193B19401944-194F",Lisu:"A4D0-A4FF",Malayalam:"0D020D030D05-0D0C0D0E-0D100D12-0D3A0D3D-0D440D46-0D480D4A-0D4E0D570D60-0D630D66-0D750D79-0D7F",Mandaic:"0840-085B085E",Meetei_Mayek:"AAE0-AAF6ABC0-ABEDABF0-ABF9",Mongolian:"1800180118041806-180E1810-18191820-18771880-18AA",Myanmar:"1000-109FAA60-AA7B",New_Tai_Lue:"1980-19AB19B0-19C919D0-19DA19DE19DF",Nko:"07C0-07FA",Ogham:"1680-169C",Ol_Chiki:"1C50-1C7F",Oriya:"0B01-0B030B05-0B0C0B0F0B100B13-0B280B2A-0B300B320B330B35-0B390B3C-0B440B470B480B4B-0B4D0B560B570B5C0B5D0B5F-0B630B66-0B77",Phags_Pa:"A840-A877",Rejang:"A930-A953A95F",Runic:"16A0-16EA16EE-16F0",Samaritan:"0800-082D0830-083E",Saurashtra:"A880-A8C4A8CE-A8D9",Sinhala:"0D820D830D85-0D960D9A-0DB10DB3-0DBB0DBD0DC0-0DC60DCA0DCF-0DD40DD60DD8-0DDF0DF2-0DF4",Sundanese:"1B80-1BBF1CC0-1CC7",Syloti_Nagri:"A800-A82B",Syriac:"0700-070D070F-074A074D-074F",Tagalog:"1700-170C170E-1714",Tagbanwa:"1760-176C176E-177017721773",Tai_Le:"1950-196D1970-1974",Tai_Tham:"1A20-1A5E1A60-1A7C1A7F-1A891A90-1A991AA0-1AAD",Tai_Viet:"AA80-AAC2AADB-AADF",Tamil:"0B820B830B85-0B8A0B8E-0B900B92-0B950B990B9A0B9C0B9E0B9F0BA30BA40BA8-0BAA0BAE-0BB90BBE-0BC20BC6-0BC80BCA-0BCD0BD00BD70BE6-0BFA",Telugu:"0C01-0C030C05-0C0C0C0E-0C100C12-0C280C2A-0C330C35-0C390C3D-0C440C46-0C480C4A-0C4D0C550C560C580C590C60-0C630C66-0C6F0C78-0C7F",Thaana:"0780-07B1",Thai:"0E01-0E3A0E40-0E5B",Tibetan:"0F00-0F470F49-0F6C0F71-0F970F99-0FBC0FBE-0FCC0FCE-0FD40FD90FDA",Tifinagh:"2D30-2D672D6F2D702D7F",Vai:"A500-A62B",Yi:"A000-A48CA490-A4C6"})})(XRegExp);
+//XRegExp Unicode Blocks 1.2.0
+(function(n){"use strict";if(!n.addUnicodePackage)throw new ReferenceError("Unicode Base must be loaded before Unicode Blocks");n.install("extensibility"),n.addUnicodePackage({InBasic_Latin:"0000-007F",InLatin_1_Supplement:"0080-00FF",InLatin_Extended_A:"0100-017F",InLatin_Extended_B:"0180-024F",InIPA_Extensions:"0250-02AF",InSpacing_Modifier_Letters:"02B0-02FF",InCombining_Diacritical_Marks:"0300-036F",InGreek_and_Coptic:"0370-03FF",InCyrillic:"0400-04FF",InCyrillic_Supplement:"0500-052F",InArmenian:"0530-058F",InHebrew:"0590-05FF",InArabic:"0600-06FF",InSyriac:"0700-074F",InArabic_Supplement:"0750-077F",InThaana:"0780-07BF",InNKo:"07C0-07FF",InSamaritan:"0800-083F",InMandaic:"0840-085F",InArabic_Extended_A:"08A0-08FF",InDevanagari:"0900-097F",InBengali:"0980-09FF",InGurmukhi:"0A00-0A7F",InGujarati:"0A80-0AFF",InOriya:"0B00-0B7F",InTamil:"0B80-0BFF",InTelugu:"0C00-0C7F",InKannada:"0C80-0CFF",InMalayalam:"0D00-0D7F",InSinhala:"0D80-0DFF",InThai:"0E00-0E7F",InLao:"0E80-0EFF",InTibetan:"0F00-0FFF",InMyanmar:"1000-109F",InGeorgian:"10A0-10FF",InHangul_Jamo:"1100-11FF",InEthiopic:"1200-137F",InEthiopic_Supplement:"1380-139F",InCherokee:"13A0-13FF",InUnified_Canadian_Aboriginal_Syllabics:"1400-167F",InOgham:"1680-169F",InRunic:"16A0-16FF",InTagalog:"1700-171F",InHanunoo:"1720-173F",InBuhid:"1740-175F",InTagbanwa:"1760-177F",InKhmer:"1780-17FF",InMongolian:"1800-18AF",InUnified_Canadian_Aboriginal_Syllabics_Extended:"18B0-18FF",InLimbu:"1900-194F",InTai_Le:"1950-197F",InNew_Tai_Lue:"1980-19DF",InKhmer_Symbols:"19E0-19FF",InBuginese:"1A00-1A1F",InTai_Tham:"1A20-1AAF",InBalinese:"1B00-1B7F",InSundanese:"1B80-1BBF",InBatak:"1BC0-1BFF",InLepcha:"1C00-1C4F",InOl_Chiki:"1C50-1C7F",InSundanese_Supplement:"1CC0-1CCF",InVedic_Extensions:"1CD0-1CFF",InPhonetic_Extensions:"1D00-1D7F",InPhonetic_Extensions_Supplement:"1D80-1DBF",InCombining_Diacritical_Marks_Supplement:"1DC0-1DFF",InLatin_Extended_Additional:"1E00-1EFF",InGreek_Extended:"1F00-1FFF",InGeneral_Punctuation:"2000-206F",InSuperscripts_and_Subscripts:"2070-209F",InCurrency_Symbols:"20A0-20CF",InCombining_Diacritical_Marks_for_Symbols:"20D0-20FF",InLetterlike_Symbols:"2100-214F",InNumber_Forms:"2150-218F",InArrows:"2190-21FF",InMathematical_Operators:"2200-22FF",InMiscellaneous_Technical:"2300-23FF",InControl_Pictures:"2400-243F",InOptical_Character_Recognition:"2440-245F",InEnclosed_Alphanumerics:"2460-24FF",InBox_Drawing:"2500-257F",InBlock_Elements:"2580-259F",InGeometric_Shapes:"25A0-25FF",InMiscellaneous_Symbols:"2600-26FF",InDingbats:"2700-27BF",InMiscellaneous_Mathematical_Symbols_A:"27C0-27EF",InSupplemental_Arrows_A:"27F0-27FF",InBraille_Patterns:"2800-28FF",InSupplemental_Arrows_B:"2900-297F",InMiscellaneous_Mathematical_Symbols_B:"2980-29FF",InSupplemental_Mathematical_Operators:"2A00-2AFF",InMiscellaneous_Symbols_and_Arrows:"2B00-2BFF",InGlagolitic:"2C00-2C5F",InLatin_Extended_C:"2C60-2C7F",InCoptic:"2C80-2CFF",InGeorgian_Supplement:"2D00-2D2F",InTifinagh:"2D30-2D7F",InEthiopic_Extended:"2D80-2DDF",InCyrillic_Extended_A:"2DE0-2DFF",InSupplemental_Punctuation:"2E00-2E7F",InCJK_Radicals_Supplement:"2E80-2EFF",InKangxi_Radicals:"2F00-2FDF",InIdeographic_Description_Characters:"2FF0-2FFF",InCJK_Symbols_and_Punctuation:"3000-303F",InHiragana:"3040-309F",InKatakana:"30A0-30FF",InBopomofo:"3100-312F",InHangul_Compatibility_Jamo:"3130-318F",InKanbun:"3190-319F",InBopomofo_Extended:"31A0-31BF",InCJK_Strokes:"31C0-31EF",InKatakana_Phonetic_Extensions:"31F0-31FF",InEnclosed_CJK_Letters_and_Months:"3200-32FF",InCJK_Compatibility:"3300-33FF",InCJK_Unified_Ideographs_Extension_A:"3400-4DBF",InYijing_Hexagram_Symbols:"4DC0-4DFF",InCJK_Unified_Ideographs:"4E00-9FFF",InYi_Syllables:"A000-A48F",InYi_Radicals:"A490-A4CF",InLisu:"A4D0-A4FF",InVai:"A500-A63F",InCyrillic_Extended_B:"A640-A69F",InBamum:"A6A0-A6FF",InModifier_Tone_Letters:"A700-A71F",InLatin_Extended_D:"A720-A7FF",InSyloti_Nagri:"A800-A82F",InCommon_Indic_Number_Forms:"A830-A83F",InPhags_pa:"A840-A87F",InSaurashtra:"A880-A8DF",InDevanagari_Extended:"A8E0-A8FF",InKayah_Li:"A900-A92F",InRejang:"A930-A95F",InHangul_Jamo_Extended_A:"A960-A97F",InJavanese:"A980-A9DF",InCham:"AA00-AA5F",InMyanmar_Extended_A:"AA60-AA7F",InTai_Viet:"AA80-AADF",InMeetei_Mayek_Extensions:"AAE0-AAFF",InEthiopic_Extended_A:"AB00-AB2F",InMeetei_Mayek:"ABC0-ABFF",InHangul_Syllables:"AC00-D7AF",InHangul_Jamo_Extended_B:"D7B0-D7FF",InHigh_Surrogates:"D800-DB7F",InHigh_Private_Use_Surrogates:"DB80-DBFF",InLow_Surrogates:"DC00-DFFF",InPrivate_Use_Area:"E000-F8FF",InCJK_Compatibility_Ideographs:"F900-FAFF",InAlphabetic_Presentation_Forms:"FB00-FB4F",InArabic_Presentation_Forms_A:"FB50-FDFF",InVariation_Selectors:"FE00-FE0F",InVertical_Forms:"FE10-FE1F",InCombining_Half_Marks:"FE20-FE2F",InCJK_Compatibility_Forms:"FE30-FE4F",InSmall_Form_Variants:"FE50-FE6F",InArabic_Presentation_Forms_B:"FE70-FEFF",InHalfwidth_and_Fullwidth_Forms:"FF00-FFEF",InSpecials:"FFF0-FFFF"})})(XRegExp);
+//XRegExp Unicode Properties 1.0.0
+(function(n){"use strict";if(!n.addUnicodePackage)throw new ReferenceError("Unicode Base must be loaded before Unicode Properties");n.install("extensibility"),n.addUnicodePackage({Alphabetic:"0041-005A0061-007A00AA00B500BA00C0-00D600D8-00F600F8-02C102C6-02D102E0-02E402EC02EE03450370-037403760377037A-037D03860388-038A038C038E-03A103A3-03F503F7-0481048A-05270531-055605590561-058705B0-05BD05BF05C105C205C405C505C705D0-05EA05F0-05F20610-061A0620-06570659-065F066E-06D306D5-06DC06E1-06E806ED-06EF06FA-06FC06FF0710-073F074D-07B107CA-07EA07F407F507FA0800-0817081A-082C0840-085808A008A2-08AC08E4-08E908F0-08FE0900-093B093D-094C094E-09500955-09630971-09770979-097F0981-09830985-098C098F09900993-09A809AA-09B009B209B6-09B909BD-09C409C709C809CB09CC09CE09D709DC09DD09DF-09E309F009F10A01-0A030A05-0A0A0A0F0A100A13-0A280A2A-0A300A320A330A350A360A380A390A3E-0A420A470A480A4B0A4C0A510A59-0A5C0A5E0A70-0A750A81-0A830A85-0A8D0A8F-0A910A93-0AA80AAA-0AB00AB20AB30AB5-0AB90ABD-0AC50AC7-0AC90ACB0ACC0AD00AE0-0AE30B01-0B030B05-0B0C0B0F0B100B13-0B280B2A-0B300B320B330B35-0B390B3D-0B440B470B480B4B0B4C0B560B570B5C0B5D0B5F-0B630B710B820B830B85-0B8A0B8E-0B900B92-0B950B990B9A0B9C0B9E0B9F0BA30BA40BA8-0BAA0BAE-0BB90BBE-0BC20BC6-0BC80BCA-0BCC0BD00BD70C01-0C030C05-0C0C0C0E-0C100C12-0C280C2A-0C330C35-0C390C3D-0C440C46-0C480C4A-0C4C0C550C560C580C590C60-0C630C820C830C85-0C8C0C8E-0C900C92-0CA80CAA-0CB30CB5-0CB90CBD-0CC40CC6-0CC80CCA-0CCC0CD50CD60CDE0CE0-0CE30CF10CF20D020D030D05-0D0C0D0E-0D100D12-0D3A0D3D-0D440D46-0D480D4A-0D4C0D4E0D570D60-0D630D7A-0D7F0D820D830D85-0D960D9A-0DB10DB3-0DBB0DBD0DC0-0DC60DCF-0DD40DD60DD8-0DDF0DF20DF30E01-0E3A0E40-0E460E4D0E810E820E840E870E880E8A0E8D0E94-0E970E99-0E9F0EA1-0EA30EA50EA70EAA0EAB0EAD-0EB90EBB-0EBD0EC0-0EC40EC60ECD0EDC-0EDF0F000F40-0F470F49-0F6C0F71-0F810F88-0F970F99-0FBC1000-10361038103B-103F1050-10621065-1068106E-1086108E109C109D10A0-10C510C710CD10D0-10FA10FC-1248124A-124D1250-12561258125A-125D1260-1288128A-128D1290-12B012B2-12B512B8-12BE12C012C2-12C512C8-12D612D8-13101312-13151318-135A135F1380-138F13A0-13F41401-166C166F-167F1681-169A16A0-16EA16EE-16F01700-170C170E-17131720-17331740-17531760-176C176E-1770177217731780-17B317B6-17C817D717DC1820-18771880-18AA18B0-18F51900-191C1920-192B1930-19381950-196D1970-19741980-19AB19B0-19C91A00-1A1B1A20-1A5E1A61-1A741AA71B00-1B331B35-1B431B45-1B4B1B80-1BA91BAC-1BAF1BBA-1BE51BE7-1BF11C00-1C351C4D-1C4F1C5A-1C7D1CE9-1CEC1CEE-1CF31CF51CF61D00-1DBF1E00-1F151F18-1F1D1F20-1F451F48-1F4D1F50-1F571F591F5B1F5D1F5F-1F7D1F80-1FB41FB6-1FBC1FBE1FC2-1FC41FC6-1FCC1FD0-1FD31FD6-1FDB1FE0-1FEC1FF2-1FF41FF6-1FFC2071207F2090-209C21022107210A-211321152119-211D212421262128212A-212D212F-2139213C-213F2145-2149214E2160-218824B6-24E92C00-2C2E2C30-2C5E2C60-2CE42CEB-2CEE2CF22CF32D00-2D252D272D2D2D30-2D672D6F2D80-2D962DA0-2DA62DA8-2DAE2DB0-2DB62DB8-2DBE2DC0-2DC62DC8-2DCE2DD0-2DD62DD8-2DDE2DE0-2DFF2E2F3005-30073021-30293031-30353038-303C3041-3096309D-309F30A1-30FA30FC-30FF3105-312D3131-318E31A0-31BA31F0-31FF3400-4DB54E00-9FCCA000-A48CA4D0-A4FDA500-A60CA610-A61FA62AA62BA640-A66EA674-A67BA67F-A697A69F-A6EFA717-A71FA722-A788A78B-A78EA790-A793A7A0-A7AAA7F8-A801A803-A805A807-A80AA80C-A827A840-A873A880-A8C3A8F2-A8F7A8FBA90A-A92AA930-A952A960-A97CA980-A9B2A9B4-A9BFA9CFAA00-AA36AA40-AA4DAA60-AA76AA7AAA80-AABEAAC0AAC2AADB-AADDAAE0-AAEFAAF2-AAF5AB01-AB06AB09-AB0EAB11-AB16AB20-AB26AB28-AB2EABC0-ABEAAC00-D7A3D7B0-D7C6D7CB-D7FBF900-FA6DFA70-FAD9FB00-FB06FB13-FB17FB1D-FB28FB2A-FB36FB38-FB3CFB3EFB40FB41FB43FB44FB46-FBB1FBD3-FD3DFD50-FD8FFD92-FDC7FDF0-FDFBFE70-FE74FE76-FEFCFF21-FF3AFF41-FF5AFF66-FFBEFFC2-FFC7FFCA-FFCFFFD2-FFD7FFDA-FFDC",Uppercase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+//XRegExp.matchRecursive 0.2.0
+(function(n){"use strict";function t(n,t,i,r){return{value:n,name:t,start:i,end:r}}n.matchRecursive=function(i,r,u,f,e){f=f||"",e=e||{};var g=f.indexOf("g")>-1,nt=f.indexOf("y")>-1,d=f.replace(/y/g,""),y=e.escapeChar,o=e.valueNames,v=[],b=0,h=0,s=0,c=0,p,w,l,a,k;if(r=n(r,d),u=n(u,d),y){if(y.length>1)throw new SyntaxError("can't use more than one escape character");y=n.escape(y),k=new RegExp("(?:"+y+"[\\S\\s]|(?:(?!"+n.union([r,u]).source+")[^"+y+"])+)+",f.replace(/[^im]+/g,""))}for(;;){if(y&&(s+=(n.exec(i,k,s,"sticky")||[""])[0].length),l=n.exec(i,r,s),a=n.exec(i,u,s),l&&a&&(l.index<=a.index?a=null:l=null),l||a)h=(l||a).index,s=h+(l||a)[0].length;else if(!b)break;if(nt&&!b&&h>c)break;if(l)b||(p=h,w=s),++b;else if(a&&b){if(!--b&&(o?(o[0]&&p>c&&v.push(t(o[0],i.slice(c,p),c,p)),o[1]&&v.push(t(o[1],i.slice(p,w),p,w)),o[2]&&v.push(t(o[2],i.slice(w,h),w,h)),o[3]&&v.push(t(o[3],i.slice(h,s),h,s))):v.push(i.slice(w,h)),c=s,!g))break}else throw new Error("string contains unbalanced delimiters");h===s&&++s}return g&&!nt&&o&&o[0]&&i.length>c&&v.push(t(o[0],i.slice(c),c,i.length)),v}})(XRegExp);
+//XRegExp.build 0.1.0
+(function(n){"use strict";function u(n){var i=/^(?:\(\?:\))?\^/,t=/\$(?:\(\?:\))?$/;return t.test(n.replace(/\\[\s\S]/g,""))?n.replace(i,"").replace(t,""):n}function t(t){return n.isRegExp(t)?t.xregexp&&!t.xregexp.isNative?t:n(t.source):n(t)}var i=/(\()(?!\?)|\\([1-9]\d*)|\\[\s\S]|\[(?:[^\\\]]|\\[\s\S])*]/g,r=n.union([/\({{([\w$]+)}}\)|{{([\w$]+)}}/,i],"g");n.build=function(f,e,o){var w=/^\(\?([\w$]+)\)/.exec(f),l={},s=0,v,h=0,p=[0],y,a,c;w&&(o=o||"",w[1].replace(/./g,function(n){o+=o.indexOf(n)>-1?"":n}));for(c in e)e.hasOwnProperty(c)&&(a=t(e[c]),l[c]={pattern:u(a.source),names:a.xregexp.captureNames||[]});return f=t(f),y=f.xregexp.captureNames||[],f=f.source.replace(r,function(n,t,r,u,f){var o=t||r,e,c;if(o){if(!l.hasOwnProperty(o))throw new ReferenceError("undefined property "+n);return t?(e=y[h],p[++h]=++s,c="(?<"+(e||o)+">"):c="(?:",v=s,c+l[o].pattern.replace(i,function(n,t,i){if(t){if(e=l[o].names[s-v],++s,e)return"(?<"+e+">"}else if(i)return"\\"+(+i+v);return n})+")"}if(u){if(e=y[h],p[++h]=++s,e)return"(?<"+e+">"}else if(f)return"\\"+p[+f];return n}),n(f,o)}})(XRegExp);
+//XRegExp Prototype Methods 1.0.0
+(function(n){"use strict";function t(n,t){for(var i in t)t.hasOwnProperty(i)&&(n[i]=t[i])}t(n.prototype,{apply:function(n,t){return this.test(t[0])},call:function(n,t){return this.test(t)},forEach:function(t,i,r){return n.forEach(t,this,i,r)},globalize:function(){return n.globalize(this)},xexec:function(t,i,r){return n.exec(t,this,i,r)},xtest:function(t,i,r){return n.test(t,this,i,r)}})})(XRegExp)
diff --git a/interface/static/css/codemirror/lib/codemirror.css b/interface/static/css/codemirror/lib/codemirror.css
new file mode 100644
index 0000000..4bd815e
--- /dev/null
+++ b/interface/static/css/codemirror/lib/codemirror.css
@@ -0,0 +1,338 @@
+/* BASICS */
+
+.CodeMirror {
+  /* Set height, width, borders, and global font properties here */
+  font-family: monospace;
+  height: 300px;
+  color: black;
+}
+
+/* PADDING */
+
+.CodeMirror-lines {
+  padding: 4px 0; /* Vertical padding around content */
+}
+.CodeMirror pre {
+  padding: 0 4px; /* Horizontal padding of content */
+}
+
+.CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  background-color: white; /* The little square between H and V scrollbars */
+}
+
+/* GUTTER */
+
+.CodeMirror-gutters {
+  border-right: 1px solid #ddd;
+  background-color: #f7f7f7;
+  white-space: nowrap;
+}
+.CodeMirror-linenumbers {}
+.CodeMirror-linenumber {
+  padding: 0 3px 0 5px;
+  min-width: 20px;
+  text-align: right;
+  color: #999;
+  white-space: nowrap;
+}
+
+.CodeMirror-guttermarker { color: black; }
+.CodeMirror-guttermarker-subtle { color: #999; }
+
+/* CURSOR */
+
+.CodeMirror-cursor {
+  border-left: 1px solid black;
+  border-right: none;
+  width: 0;
+}
+/* Shown when moving in bi-directional text */
+.CodeMirror div.CodeMirror-secondarycursor {
+  border-left: 1px solid silver;
+}
+.cm-fat-cursor .CodeMirror-cursor {
+  width: auto;
+  border: 0 !important;
+  background: #7e7;
+}
+.cm-fat-cursor div.CodeMirror-cursors {
+  z-index: 1;
+}
+
+.cm-animate-fat-cursor {
+  width: auto;
+  border: 0;
+  -webkit-animation: blink 1.06s steps(1) infinite;
+  -moz-animation: blink 1.06s steps(1) infinite;
+  animation: blink 1.06s steps(1) infinite;
+  background-color: #7e7;
+}
+@-moz-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@-webkit-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+
+/* Can style cursor different in overwrite (non-insert) mode */
+.CodeMirror-overwrite .CodeMirror-cursor {}
+
+.cm-tab { display: inline-block; text-decoration: inherit; }
+
+.CodeMirror-ruler {
+  border-left: 1px solid #ccc;
+  position: absolute;
+}
+
+/* DEFAULT THEME */
+
+.cm-s-default .cm-header {color: blue;}
+.cm-s-default .cm-quote {color: #090;}
+.cm-negative {color: #d44;}
+.cm-positive {color: #292;}
+.cm-header, .cm-strong {font-weight: bold;}
+.cm-em {font-style: italic;}
+.cm-link {text-decoration: underline;}
+.cm-strikethrough {text-decoration: line-through;}
+
+.cm-s-default .cm-keyword {color: #708;}
+.cm-s-default .cm-atom {color: #219;}
+.cm-s-default .cm-number {color: #164;}
+.cm-s-default .cm-def {color: #00f;}
+.cm-s-default .cm-variable,
+.cm-s-default .cm-punctuation,
+.cm-s-default .cm-property,
+.cm-s-default .cm-operator {}
+.cm-s-default .cm-variable-2 {color: #05a;}
+.cm-s-default .cm-variable-3 {color: #085;}
+.cm-s-default .cm-comment {color: #a50;}
+.cm-s-default .cm-string {color: #a11;}
+.cm-s-default .cm-string-2 {color: #f50;}
+.cm-s-default .cm-meta {color: #555;}
+.cm-s-default .cm-qualifier {color: #555;}
+.cm-s-default .cm-builtin {color: #30a;}
+.cm-s-default .cm-bracket {color: #997;}
+.cm-s-default .cm-tag {color: #170;}
+.cm-s-default .cm-attribute {color: #00c;}
+.cm-s-default .cm-hr {color: #999;}
+.cm-s-default .cm-link {color: #00c;}
+
+.cm-s-default .cm-error {color: #f00;}
+.cm-invalidchar {color: #f00;}
+
+.CodeMirror-composing { border-bottom: 2px solid; }
+
+/* Default styles for common addons */
+
+div.CodeMirror span.CodeMirror-matchingbracket {color: #0f0;}
+div.CodeMirror span.CodeMirror-nonmatchingbracket {color: #f22;}
+.CodeMirror-matchingtag { background: rgba(255, 150, 0, .3); }
+.CodeMirror-activeline-background {background: #e8f2ff;}
+
+/* STOP */
+
+/* The rest of this file contains styles related to the mechanics of
+   the editor. You probably shouldn't touch them. */
+
+.CodeMirror {
+  position: relative;
+  overflow: hidden;
+  background: white;
+}
+
+.CodeMirror-scroll {
+  overflow: scroll !important; /* Things will break if this is overridden */
+  /* 30px is the magic margin used to hide the element's real scrollbars */
+  /* See overflow: hidden in .CodeMirror */
+  margin-bottom: -30px; margin-right: -30px;
+  padding-bottom: 30px;
+  height: 100%;
+  outline: none; /* Prevent dragging from highlighting the element */
+  position: relative;
+}
+.CodeMirror-sizer {
+  position: relative;
+  border-right: 30px solid transparent;
+}
+
+/* The fake, visible scrollbars. Used to force redraw during scrolling
+   before actual scrolling happens, thus preventing shaking and
+   flickering artifacts. */
+.CodeMirror-vscrollbar, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  position: absolute;
+  z-index: 6;
+  display: none;
+}
+.CodeMirror-vscrollbar {
+  right: 0; top: 0;
+  overflow-x: hidden;
+  overflow-y: scroll;
+}
+.CodeMirror-hscrollbar {
+  bottom: 0; left: 0;
+  overflow-y: hidden;
+  overflow-x: scroll;
+}
+.CodeMirror-scrollbar-filler {
+  right: 0; bottom: 0;
+}
+.CodeMirror-gutter-filler {
+  left: 0; bottom: 0;
+}
+
+.CodeMirror-gutters {
+  position: absolute; left: 0; top: 0;
+  min-height: 100%;
+  z-index: 3;
+}
+.CodeMirror-gutter {
+  white-space: normal;
+  height: 100%;
+  display: inline-block;
+  vertical-align: top;
+  margin-bottom: -30px;
+  /* Hack to make IE7 behave */
+  *zoom:1;
+  *display:inline;
+}
+.CodeMirror-gutter-wrapper {
+  position: absolute;
+  z-index: 4;
+  background: none !important;
+  border: none !important;
+}
+.CodeMirror-gutter-background {
+  position: absolute;
+  top: 0; bottom: 0;
+  z-index: 4;
+}
+.CodeMirror-gutter-elt {
+  position: absolute;
+  cursor: default;
+  z-index: 4;
+}
+.CodeMirror-gutter-wrapper {
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  user-select: none;
+}
+
+.CodeMirror-lines {
+  cursor: text;
+  min-height: 1px; /* prevents collapsing before first draw */
+}
+.CodeMirror pre {
+  /* Reset some styles that the rest of the page might have set */
+  -moz-border-radius: 0; -webkit-border-radius: 0; border-radius: 0;
+  border-width: 0;
+  background: transparent;
+  font-family: inherit;
+  font-size: inherit;
+  margin: 0;
+  white-space: pre;
+  word-wrap: normal;
+  line-height: inherit;
+  color: inherit;
+  z-index: 2;
+  position: relative;
+  overflow: visible;
+  -webkit-tap-highlight-color: transparent;
+  -webkit-font-variant-ligatures: none;
+  font-variant-ligatures: none;
+}
+.CodeMirror-wrap pre {
+  word-wrap: break-word;
+  white-space: pre-wrap;
+  word-break: normal;
+}
+
+.CodeMirror-linebackground {
+  position: absolute;
+  left: 0; right: 0; top: 0; bottom: 0;
+  z-index: 0;
+}
+
+.CodeMirror-linewidget {
+  position: relative;
+  z-index: 2;
+  overflow: auto;
+}
+
+.CodeMirror-widget {}
+
+.CodeMirror-code {
+  outline: none;
+}
+
+/* Force content-box sizing for the elements where we expect it */
+.CodeMirror-scroll,
+.CodeMirror-sizer,
+.CodeMirror-gutter,
+.CodeMirror-gutters,
+.CodeMirror-linenumber {
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+}
+
+.CodeMirror-measure {
+  position: absolute;
+  width: 100%;
+  height: 0;
+  overflow: hidden;
+  visibility: hidden;
+}
+
+.CodeMirror-cursor { position: absolute; }
+.CodeMirror-measure pre { position: static; }
+
+div.CodeMirror-cursors {
+  visibility: hidden;
+  position: relative;
+  z-index: 3;
+}
+div.CodeMirror-dragcursors {
+  visibility: visible;
+}
+
+.CodeMirror-focused div.CodeMirror-cursors {
+  visibility: visible;
+}
+
+.CodeMirror-selected { background: #d9d9d9; }
+.CodeMirror-focused .CodeMirror-selected { background: #d7d4f0; }
+.CodeMirror-crosshair { cursor: crosshair; }
+.CodeMirror-line::selection, .CodeMirror-line > span::selection, .CodeMirror-line > span > span::selection { background: #d7d4f0; }
+.CodeMirror-line::-moz-selection, .CodeMirror-line > span::-moz-selection, .CodeMirror-line > span > span::-moz-selection { background: #d7d4f0; }
+
+.cm-searching {
+  background: #ffa;
+  background: rgba(255, 255, 0, .4);
+}
+
+/* IE7 hack to prevent it from returning funny offsetTops on the spans */
+.CodeMirror span { *vertical-align: text-bottom; }
+
+/* Used to force a border model for a node */
+.cm-force-border { padding-right: .1px; }
+
+@media print {
+  /* Hide the cursor when printing */
+  .CodeMirror div.CodeMirror-cursors {
+    visibility: hidden;
+  }
+}
+
+/* See issue #2901 */
+.cm-tab-wrap-hack:after { content: ''; }
+
+/* Help users use markselection to safely style text background */
+span.CodeMirror-selectedtext { background: none; }
diff --git a/interface/static/js/codemirror/lib/codemirror.js b/interface/static/js/codemirror/lib/codemirror.js
new file mode 100644
index 0000000..c56e147
--- /dev/null
+++ b/interface/static/js/codemirror/lib/codemirror.js
@@ -0,0 +1,8908 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// This is CodeMirror (http://codemirror.net), a code editor
+// implemented in JavaScript on top of the browser's DOM.
+//
+// You can find some technical background for some of the code below
+// at http://marijnhaverbeke.nl/blog/#cm-internals .
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    module.exports = mod();
+  else if (typeof define == "function" && define.amd) // AMD
+    return define([], mod);
+  else // Plain browser env
+    (this || window).CodeMirror = mod();
+})(function() {
+  "use strict";
+
+  // BROWSER SNIFFING
+
+  // Kludges for bugs and behavior differences that can't be feature
+  // detected are enabled based on userAgent etc sniffing.
+  var userAgent = navigator.userAgent;
+  var platform = navigator.platform;
+
+  var gecko = /gecko\/\d/i.test(userAgent);
+  var ie_upto10 = /MSIE \d/.test(userAgent);
+  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
+  var ie = ie_upto10 || ie_11up;
+  var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : ie_11up[1]);
+  var webkit = /WebKit\//.test(userAgent);
+  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
+  var chrome = /Chrome\//.test(userAgent);
+  var presto = /Opera\//.test(userAgent);
+  var safari = /Apple Computer/.test(navigator.vendor);
+  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
+  var phantom = /PhantomJS/.test(userAgent);
+
+  var ios = /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
+  // This is woefully incomplete. Suggestions for alternative methods welcome.
+  var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
+  var mac = ios || /Mac/.test(platform);
+  var chromeOS = /\bCrOS\b/.test(userAgent);
+  var windows = /win/i.test(platform);
+
+  var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
+  if (presto_version) presto_version = Number(presto_version[1]);
+  if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
+  // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
+  var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
+  var captureRightClick = gecko || (ie && ie_version >= 9);
+
+  // Optimize some code when these features are not used.
+  var sawReadOnlySpans = false, sawCollapsedSpans = false;
+
+  // EDITOR CONSTRUCTOR
+
+  // A CodeMirror instance represents an editor. This is the object
+  // that user code is usually dealing with.
+
+  function CodeMirror(place, options) {
+    if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
+
+    this.options = options = options ? copyObj(options) : {};
+    // Determine effective options based on given values and defaults.
+    copyObj(defaults, options, false);
+    setGuttersForLineNumbers(options);
+
+    var doc = options.value;
+    if (typeof doc == "string") doc = new Doc(doc, options.mode, null, options.lineSeparator);
+    this.doc = doc;
+
+    var input = new CodeMirror.inputStyles[options.inputStyle](this);
+    var display = this.display = new Display(place, doc, input);
+    display.wrapper.CodeMirror = this;
+    updateGutters(this);
+    themeChanged(this);
+    if (options.lineWrapping)
+      this.display.wrapper.className += " CodeMirror-wrap";
+    if (options.autofocus && !mobile) display.input.focus();
+    initScrollbars(this);
+
+    this.state = {
+      keyMaps: [],  // stores maps added by addKeyMap
+      overlays: [], // highlighting overlays, as added by addOverlay
+      modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
+      overwrite: false,
+      delayingBlurEvent: false,
+      focused: false,
+      suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
+      pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
+      selectingText: false,
+      draggingText: false,
+      highlight: new Delayed(), // stores highlight worker timeout
+      keySeq: null,  // Unfinished key sequence
+      specialChars: null
+    };
+
+    var cm = this;
+
+    // Override magic textarea content restore that IE sometimes does
+    // on our hidden textarea on reload
+    if (ie && ie_version < 11) setTimeout(function() { cm.display.input.reset(true); }, 20);
+
+    registerEventHandlers(this);
+    ensureGlobalHandlers();
+
+    startOperation(this);
+    this.curOp.forceUpdate = true;
+    attachDoc(this, doc);
+
+    if ((options.autofocus && !mobile) || cm.hasFocus())
+      setTimeout(bind(onFocus, this), 20);
+    else
+      onBlur(this);
+
+    for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt))
+      optionHandlers[opt](this, options[opt], Init);
+    maybeUpdateLineNumberWidth(this);
+    if (options.finishInit) options.finishInit(this);
+    for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
+    endOperation(this);
+    // Suppress optimizelegibility in Webkit, since it breaks text
+    // measuring on line wrapping boundaries.
+    if (webkit && options.lineWrapping &&
+        getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
+      display.lineDiv.style.textRendering = "auto";
+  }
+
+  // DISPLAY CONSTRUCTOR
+
+  // The display handles the DOM integration, both for input reading
+  // and content drawing. It holds references to DOM nodes and
+  // display-related state.
+
+  function Display(place, doc, input) {
+    var d = this;
+    this.input = input;
+
+    // Covers bottom-right square when both scrollbars are present.
+    d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
+    d.scrollbarFiller.setAttribute("cm-not-content", "true");
+    // Covers bottom of gutter when coverGutterNextToScrollbar is on
+    // and h scrollbar is present.
+    d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
+    d.gutterFiller.setAttribute("cm-not-content", "true");
+    // Will contain the actual code, positioned to cover the viewport.
+    d.lineDiv = elt("div", null, "CodeMirror-code");
+    // Elements are added to these to represent selection and cursors.
+    d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
+    d.cursorDiv = elt("div", null, "CodeMirror-cursors");
+    // A visibility: hidden element used to find the size of things.
+    d.measure = elt("div", null, "CodeMirror-measure");
+    // When lines outside of the viewport are measured, they are drawn in this.
+    d.lineMeasure = elt("div", null, "CodeMirror-measure");
+    // Wraps everything that needs to exist inside the vertically-padded coordinate system
+    d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
+                      null, "position: relative; outline: none");
+    // Moved around its parent to cover visible view.
+    d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
+    // Set to the height of the document, allowing scrolling.
+    d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
+    d.sizerWidth = null;
+    // Behavior of elts with overflow: auto and padding is
+    // inconsistent across browsers. This is used to ensure the
+    // scrollable area is big enough.
+    d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
+    // Will contain the gutters, if any.
+    d.gutters = elt("div", null, "CodeMirror-gutters");
+    d.lineGutter = null;
+    // Actual scrollable element.
+    d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
+    d.scroller.setAttribute("tabIndex", "-1");
+    // The element in which the editor lives.
+    d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
+
+    // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+    if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
+    if (!webkit && !(gecko && mobile)) d.scroller.draggable = true;
+
+    if (place) {
+      if (place.appendChild) place.appendChild(d.wrapper);
+      else place(d.wrapper);
+    }
+
+    // Current rendered range (may be bigger than the view window).
+    d.viewFrom = d.viewTo = doc.first;
+    d.reportedViewFrom = d.reportedViewTo = doc.first;
+    // Information about the rendered lines.
+    d.view = [];
+    d.renderedView = null;
+    // Holds info about a single rendered line when it was rendered
+    // for measurement, while not in view.
+    d.externalMeasured = null;
+    // Empty space (in pixels) above the view
+    d.viewOffset = 0;
+    d.lastWrapHeight = d.lastWrapWidth = 0;
+    d.updateLineNumbers = null;
+
+    d.nativeBarWidth = d.barHeight = d.barWidth = 0;
+    d.scrollbarsClipped = false;
+
+    // Used to only resize the line number gutter when necessary (when
+    // the amount of lines crosses a boundary that makes its width change)
+    d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
+    // Set to true when a non-horizontal-scrolling line widget is
+    // added. As an optimization, line widget aligning is skipped when
+    // this is false.
+    d.alignWidgets = false;
+
+    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+
+    // Tracks the maximum line length so that the horizontal scrollbar
+    // can be kept static when scrolling.
+    d.maxLine = null;
+    d.maxLineLength = 0;
+    d.maxLineChanged = false;
+
+    // Used for measuring wheel scrolling granularity
+    d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
+
+    // True when shift is held down.
+    d.shift = false;
+
+    // Used to track whether anything happened since the context menu
+    // was opened.
+    d.selForContextMenu = null;
+
+    d.activeTouch = null;
+
+    input.init(d);
+  }
+
+  // STATE UPDATES
+
+  // Used to get the editor into a consistent state again when options change.
+
+  function loadMode(cm) {
+    cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption);
+    resetModeState(cm);
+  }
+
+  function resetModeState(cm) {
+    cm.doc.iter(function(line) {
+      if (line.stateAfter) line.stateAfter = null;
+      if (line.styles) line.styles = null;
+    });
+    cm.doc.frontier = cm.doc.first;
+    startWorker(cm, 100);
+    cm.state.modeGen++;
+    if (cm.curOp) regChange(cm);
+  }
+
+  function wrappingChanged(cm) {
+    if (cm.options.lineWrapping) {
+      addClass(cm.display.wrapper, "CodeMirror-wrap");
+      cm.display.sizer.style.minWidth = "";
+      cm.display.sizerWidth = null;
+    } else {
+      rmClass(cm.display.wrapper, "CodeMirror-wrap");
+      findMaxLine(cm);
+    }
+    estimateLineHeights(cm);
+    regChange(cm);
+    clearCaches(cm);
+    setTimeout(function(){updateScrollbars(cm);}, 100);
+  }
+
+  // Returns a function that estimates the height of a line, to use as
+  // first approximation until the line becomes visible (and is thus
+  // properly measurable).
+  function estimateHeight(cm) {
+    var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
+    var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
+    return function(line) {
+      if (lineIsHidden(cm.doc, line)) return 0;
+
+      var widgetsHeight = 0;
+      if (line.widgets) for (var i = 0; i < line.widgets.length; i++) {
+        if (line.widgets[i].height) widgetsHeight += line.widgets[i].height;
+      }
+
+      if (wrapping)
+        return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th;
+      else
+        return widgetsHeight + th;
+    };
+  }
+
+  function estimateLineHeights(cm) {
+    var doc = cm.doc, est = estimateHeight(cm);
+    doc.iter(function(line) {
+      var estHeight = est(line);
+      if (estHeight != line.height) updateLineHeight(line, estHeight);
+    });
+  }
+
+  function themeChanged(cm) {
+    cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
+      cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
+    clearCaches(cm);
+  }
+
+  function guttersChanged(cm) {
+    updateGutters(cm);
+    regChange(cm);
+    setTimeout(function(){alignHorizontally(cm);}, 20);
+  }
+
+  // Rebuild the gutter elements, ensure the margin to the left of the
+  // code matches their width.
+  function updateGutters(cm) {
+    var gutters = cm.display.gutters, specs = cm.options.gutters;
+    removeChildren(gutters);
+    for (var i = 0; i < specs.length; ++i) {
+      var gutterClass = specs[i];
+      var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
+      if (gutterClass == "CodeMirror-linenumbers") {
+        cm.display.lineGutter = gElt;
+        gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
+      }
+    }
+    gutters.style.display = i ? "" : "none";
+    updateGutterSpace(cm);
+  }
+
+  function updateGutterSpace(cm) {
+    var width = cm.display.gutters.offsetWidth;
+    cm.display.sizer.style.marginLeft = width + "px";
+  }
+
+  // Compute the character length of a line, taking into account
+  // collapsed ranges (see markText) that might hide parts, and join
+  // other lines onto it.
+  function lineLength(line) {
+    if (line.height == 0) return 0;
+    var len = line.text.length, merged, cur = line;
+    while (merged = collapsedSpanAtStart(cur)) {
+      var found = merged.find(0, true);
+      cur = found.from.line;
+      len += found.from.ch - found.to.ch;
+    }
+    cur = line;
+    while (merged = collapsedSpanAtEnd(cur)) {
+      var found = merged.find(0, true);
+      len -= cur.text.length - found.from.ch;
+      cur = found.to.line;
+      len += cur.text.length - found.to.ch;
+    }
+    return len;
+  }
+
+  // Find the longest line in the document.
+  function findMaxLine(cm) {
+    var d = cm.display, doc = cm.doc;
+    d.maxLine = getLine(doc, doc.first);
+    d.maxLineLength = lineLength(d.maxLine);
+    d.maxLineChanged = true;
+    doc.iter(function(line) {
+      var len = lineLength(line);
+      if (len > d.maxLineLength) {
+        d.maxLineLength = len;
+        d.maxLine = line;
+      }
+    });
+  }
+
+  // Make sure the gutters options contains the element
+  // "CodeMirror-linenumbers" when the lineNumbers option is true.
+  function setGuttersForLineNumbers(options) {
+    var found = indexOf(options.gutters, "CodeMirror-linenumbers");
+    if (found == -1 && options.lineNumbers) {
+      options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
+    } else if (found > -1 && !options.lineNumbers) {
+      options.gutters = options.gutters.slice(0);
+      options.gutters.splice(found, 1);
+    }
+  }
+
+  // SCROLLBARS
+
+  // Prepare DOM reads needed to update the scrollbars. Done in one
+  // shot to minimize update/measure roundtrips.
+  function measureForScrollbars(cm) {
+    var d = cm.display, gutterW = d.gutters.offsetWidth;
+    var docH = Math.round(cm.doc.height + paddingVert(cm.display));
+    return {
+      clientHeight: d.scroller.clientHeight,
+      viewHeight: d.wrapper.clientHeight,
+      scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
+      viewWidth: d.wrapper.clientWidth,
+      barLeft: cm.options.fixedGutter ? gutterW : 0,
+      docHeight: docH,
+      scrollHeight: docH + scrollGap(cm) + d.barHeight,
+      nativeBarWidth: d.nativeBarWidth,
+      gutterWidth: gutterW
+    };
+  }
+
+  function NativeScrollbars(place, scroll, cm) {
+    this.cm = cm;
+    var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
+    var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
+    place(vert); place(horiz);
+
+    on(vert, "scroll", function() {
+      if (vert.clientHeight) scroll(vert.scrollTop, "vertical");
+    });
+    on(horiz, "scroll", function() {
+      if (horiz.clientWidth) scroll(horiz.scrollLeft, "horizontal");
+    });
+
+    this.checkedZeroWidth = false;
+    // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+    if (ie && ie_version < 8) this.horiz.style.minHeight = this.vert.style.minWidth = "18px";
+  }
+
+  NativeScrollbars.prototype = copyObj({
+    update: function(measure) {
+      var needsH = measure.scrollWidth > measure.clientWidth + 1;
+      var needsV = measure.scrollHeight > measure.clientHeight + 1;
+      var sWidth = measure.nativeBarWidth;
+
+      if (needsV) {
+        this.vert.style.display = "block";
+        this.vert.style.bottom = needsH ? sWidth + "px" : "0";
+        var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
+        // A bug in IE8 can cause this value to be negative, so guard it.
+        this.vert.firstChild.style.height =
+          Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
+      } else {
+        this.vert.style.display = "";
+        this.vert.firstChild.style.height = "0";
+      }
+
+      if (needsH) {
+        this.horiz.style.display = "block";
+        this.horiz.style.right = needsV ? sWidth + "px" : "0";
+        this.horiz.style.left = measure.barLeft + "px";
+        var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
+        this.horiz.firstChild.style.width =
+          (measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
+      } else {
+        this.horiz.style.display = "";
+        this.horiz.firstChild.style.width = "0";
+      }
+
+      if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+        if (sWidth == 0) this.zeroWidthHack();
+        this.checkedZeroWidth = true;
+      }
+
+      return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0};
+    },
+    setScrollLeft: function(pos) {
+      if (this.horiz.scrollLeft != pos) this.horiz.scrollLeft = pos;
+      if (this.disableHoriz) this.enableZeroWidthBar(this.horiz, this.disableHoriz);
+    },
+    setScrollTop: function(pos) {
+      if (this.vert.scrollTop != pos) this.vert.scrollTop = pos;
+      if (this.disableVert) this.enableZeroWidthBar(this.vert, this.disableVert);
+    },
+    zeroWidthHack: function() {
+      var w = mac && !mac_geMountainLion ? "12px" : "18px";
+      this.horiz.style.height = this.vert.style.width = w;
+      this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
+      this.disableHoriz = new Delayed;
+      this.disableVert = new Delayed;
+    },
+    enableZeroWidthBar: function(bar, delay) {
+      bar.style.pointerEvents = "auto";
+      function maybeDisable() {
+        // To find out whether the scrollbar is still visible, we
+        // check whether the element under the pixel in the bottom
+        // left corner of the scrollbar box is the scrollbar box
+        // itself (when the bar is still visible) or its filler child
+        // (when the bar is hidden). If it is still visible, we keep
+        // it enabled, if it's hidden, we disable pointer events.
+        var box = bar.getBoundingClientRect();
+        var elt = document.elementFromPoint(box.left + 1, box.bottom - 1);
+        if (elt != bar) bar.style.pointerEvents = "none";
+        else delay.set(1000, maybeDisable);
+      }
+      delay.set(1000, maybeDisable);
+    },
+    clear: function() {
+      var parent = this.horiz.parentNode;
+      parent.removeChild(this.horiz);
+      parent.removeChild(this.vert);
+    }
+  }, NativeScrollbars.prototype);
+
+  function NullScrollbars() {}
+
+  NullScrollbars.prototype = copyObj({
+    update: function() { return {bottom: 0, right: 0}; },
+    setScrollLeft: function() {},
+    setScrollTop: function() {},
+    clear: function() {}
+  }, NullScrollbars.prototype);
+
+  CodeMirror.scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
+
+  function initScrollbars(cm) {
+    if (cm.display.scrollbars) {
+      cm.display.scrollbars.clear();
+      if (cm.display.scrollbars.addClass)
+        rmClass(cm.display.wrapper, cm.display.scrollbars.addClass);
+    }
+
+    cm.display.scrollbars = new CodeMirror.scrollbarModel[cm.options.scrollbarStyle](function(node) {
+      cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
+      // Prevent clicks in the scrollbars from killing focus
+      on(node, "mousedown", function() {
+        if (cm.state.focused) setTimeout(function() { cm.display.input.focus(); }, 0);
+      });
+      node.setAttribute("cm-not-content", "true");
+    }, function(pos, axis) {
+      if (axis == "horizontal") setScrollLeft(cm, pos);
+      else setScrollTop(cm, pos);
+    }, cm);
+    if (cm.display.scrollbars.addClass)
+      addClass(cm.display.wrapper, cm.display.scrollbars.addClass);
+  }
+
+  function updateScrollbars(cm, measure) {
+    if (!measure) measure = measureForScrollbars(cm);
+    var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
+    updateScrollbarsInner(cm, measure);
+    for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
+      if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
+        updateHeightsInViewport(cm);
+      updateScrollbarsInner(cm, measureForScrollbars(cm));
+      startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
+    }
+  }
+
+  // Re-synchronize the fake scrollbars with the actual size of the
+  // content.
+  function updateScrollbarsInner(cm, measure) {
+    var d = cm.display;
+    var sizes = d.scrollbars.update(measure);
+
+    d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
+    d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
+    d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"
+
+    if (sizes.right && sizes.bottom) {
+      d.scrollbarFiller.style.display = "block";
+      d.scrollbarFiller.style.height = sizes.bottom + "px";
+      d.scrollbarFiller.style.width = sizes.right + "px";
+    } else d.scrollbarFiller.style.display = "";
+    if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+      d.gutterFiller.style.display = "block";
+      d.gutterFiller.style.height = sizes.bottom + "px";
+      d.gutterFiller.style.width = measure.gutterWidth + "px";
+    } else d.gutterFiller.style.display = "";
+  }
+
+  // Compute the lines that are visible in a given viewport (defaults
+  // the the current scroll position). viewport may contain top,
+  // height, and ensure (see op.scrollToPos) properties.
+  function visibleLines(display, doc, viewport) {
+    var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
+    top = Math.floor(top - paddingTop(display));
+    var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
+
+    var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
+    // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+    // forces those lines into the viewport (if possible).
+    if (viewport && viewport.ensure) {
+      var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
+      if (ensureFrom < from) {
+        from = ensureFrom;
+        to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
+      } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+        from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
+        to = ensureTo;
+      }
+    }
+    return {from: from, to: Math.max(to, from + 1)};
+  }
+
+  // LINE NUMBERS
+
+  // Re-align line numbers and gutter marks to compensate for
+  // horizontal scrolling.
+  function alignHorizontally(cm) {
+    var display = cm.display, view = display.view;
+    if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return;
+    var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
+    var gutterW = display.gutters.offsetWidth, left = comp + "px";
+    for (var i = 0; i < view.length; i++) if (!view[i].hidden) {
+      if (cm.options.fixedGutter && view[i].gutter)
+        view[i].gutter.style.left = left;
+      var align = view[i].alignable;
+      if (align) for (var j = 0; j < align.length; j++)
+        align[j].style.left = left;
+    }
+    if (cm.options.fixedGutter)
+      display.gutters.style.left = (comp + gutterW) + "px";
+  }
+
+  // Used to ensure that the line number gutter is still the right
+  // size for the current document size. Returns true when an update
+  // is needed.
+  function maybeUpdateLineNumberWidth(cm) {
+    if (!cm.options.lineNumbers) return false;
+    var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
+    if (last.length != display.lineNumChars) {
+      var test = display.measure.appendChild(elt("div", [elt("div", last)],
+                                                 "CodeMirror-linenumber CodeMirror-gutter-elt"));
+      var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
+      display.lineGutter.style.width = "";
+      display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
+      display.lineNumWidth = display.lineNumInnerWidth + padding;
+      display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
+      display.lineGutter.style.width = display.lineNumWidth + "px";
+      updateGutterSpace(cm);
+      return true;
+    }
+    return false;
+  }
+
+  function lineNumberFor(options, i) {
+    return String(options.lineNumberFormatter(i + options.firstLineNumber));
+  }
+
+  // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
+  // but using getBoundingClientRect to get a sub-pixel-accurate
+  // result.
+  function compensateForHScroll(display) {
+    return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left;
+  }
+
+  // DISPLAY DRAWING
+
+  function DisplayUpdate(cm, viewport, force) {
+    var display = cm.display;
+
+    this.viewport = viewport;
+    // Store some values that we'll need later (but don't want to force a relayout for)
+    this.visible = visibleLines(display, cm.doc, viewport);
+    this.editorIsHidden = !display.wrapper.offsetWidth;
+    this.wrapperHeight = display.wrapper.clientHeight;
+    this.wrapperWidth = display.wrapper.clientWidth;
+    this.oldDisplayWidth = displayWidth(cm);
+    this.force = force;
+    this.dims = getDimensions(cm);
+    this.events = [];
+  }
+
+  DisplayUpdate.prototype.signal = function(emitter, type) {
+    if (hasHandler(emitter, type))
+      this.events.push(arguments);
+  };
+  DisplayUpdate.prototype.finish = function() {
+    for (var i = 0; i < this.events.length; i++)
+      signal.apply(null, this.events[i]);
+  };
+
+  function maybeClipScrollbars(cm) {
+    var display = cm.display;
+    if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
+      display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
+      display.heightForcer.style.height = scrollGap(cm) + "px";
+      display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
+      display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
+      display.scrollbarsClipped = true;
+    }
+  }
+
+  // Does the actual updating of the line display. Bails out
+  // (returning false) when there is nothing to be done and forced is
+  // false.
+  function updateDisplayIfNeeded(cm, update) {
+    var display = cm.display, doc = cm.doc;
+
+    if (update.editorIsHidden) {
+      resetView(cm);
+      return false;
+    }
+
+    // Bail out if the visible area is already rendered and nothing changed.
+    if (!update.force &&
+        update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
+        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
+        display.renderedView == display.view && countDirtyView(cm) == 0)
+      return false;
+
+    if (maybeUpdateLineNumberWidth(cm)) {
+      resetView(cm);
+      update.dims = getDimensions(cm);
+    }
+
+    // Compute a suitable new viewport (from & to)
+    var end = doc.first + doc.size;
+    var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
+    var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
+    if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max(doc.first, display.viewFrom);
+    if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, display.viewTo);
+    if (sawCollapsedSpans) {
+      from = visualLineNo(cm.doc, from);
+      to = visualLineEndNo(cm.doc, to);
+    }
+
+    var different = from != display.viewFrom || to != display.viewTo ||
+      display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
+    adjustView(cm, from, to);
+
+    display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
+    // Position the mover div to align with the current scroll position
+    cm.display.mover.style.top = display.viewOffset + "px";
+
+    var toUpdate = countDirtyView(cm);
+    if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
+        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
+      return false;
+
+    // For big changes, we hide the enclosing element during the
+    // update, since that speeds up the operations on most browsers.
+    var focused = activeElt();
+    if (toUpdate > 4) display.lineDiv.style.display = "none";
+    patchDisplay(cm, display.updateLineNumbers, update.dims);
+    if (toUpdate > 4) display.lineDiv.style.display = "";
+    display.renderedView = display.view;
+    // There might have been a widget with a focused element that got
+    // hidden or updated, if so re-focus it.
+    if (focused && activeElt() != focused && focused.offsetHeight) focused.focus();
+
+    // Prevent selection and cursors from interfering with the scroll
+    // width and height.
+    removeChildren(display.cursorDiv);
+    removeChildren(display.selectionDiv);
+    display.gutters.style.height = display.sizer.style.minHeight = 0;
+
+    if (different) {
+      display.lastWrapHeight = update.wrapperHeight;
+      display.lastWrapWidth = update.wrapperWidth;
+      startWorker(cm, 400);
+    }
+
+    display.updateLineNumbers = null;
+
+    return true;
+  }
+
+  function postUpdateDisplay(cm, update) {
+    var viewport = update.viewport;
+
+    for (var first = true;; first = false) {
+      if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
+        // Clip forced viewport to actual scrollable area.
+        if (viewport && viewport.top != null)
+          viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)};
+        // Updated line heights might result in the drawn area not
+        // actually covering the viewport. Keep looping until it does.
+        update.visible = visibleLines(cm.display, cm.doc, viewport);
+        if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
+          break;
+      }
+      if (!updateDisplayIfNeeded(cm, update)) break;
+      updateHeightsInViewport(cm);
+      var barMeasure = measureForScrollbars(cm);
+      updateSelection(cm);
+      updateScrollbars(cm, barMeasure);
+      setDocumentHeight(cm, barMeasure);
+    }
+
+    update.signal(cm, "update", cm);
+    if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
+      update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
+      cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
+    }
+  }
+
+  function updateDisplaySimple(cm, viewport) {
+    var update = new DisplayUpdate(cm, viewport);
+    if (updateDisplayIfNeeded(cm, update)) {
+      updateHeightsInViewport(cm);
+      postUpdateDisplay(cm, update);
+      var barMeasure = measureForScrollbars(cm);
+      updateSelection(cm);
+      updateScrollbars(cm, barMeasure);
+      setDocumentHeight(cm, barMeasure);
+      update.finish();
+    }
+  }
+
+  function setDocumentHeight(cm, measure) {
+    cm.display.sizer.style.minHeight = measure.docHeight + "px";
+    cm.display.heightForcer.style.top = measure.docHeight + "px";
+    cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
+  }
+
+  // Read the actual heights of the rendered lines, and update their
+  // stored heights to match.
+  function updateHeightsInViewport(cm) {
+    var display = cm.display;
+    var prevBottom = display.lineDiv.offsetTop;
+    for (var i = 0; i < display.view.length; i++) {
+      var cur = display.view[i], height;
+      if (cur.hidden) continue;
+      if (ie && ie_version < 8) {
+        var bot = cur.node.offsetTop + cur.node.offsetHeight;
+        height = bot - prevBottom;
+        prevBottom = bot;
+      } else {
+        var box = cur.node.getBoundingClientRect();
+        height = box.bottom - box.top;
+      }
+      var diff = cur.line.height - height;
+      if (height < 2) height = textHeight(display);
+      if (diff > .001 || diff < -.001) {
+        updateLineHeight(cur.line, height);
+        updateWidgetHeight(cur.line);
+        if (cur.rest) for (var j = 0; j < cur.rest.length; j++)
+          updateWidgetHeight(cur.rest[j]);
+      }
+    }
+  }
+
+  // Read and store the height of line widgets associated with the
+  // given line.
+  function updateWidgetHeight(line) {
+    if (line.widgets) for (var i = 0; i < line.widgets.length; ++i)
+      line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight;
+  }
+
+  // Do a bulk-read of the DOM positions and sizes needed to draw the
+  // view, so that we don't interleave reading and writing to the DOM.
+  function getDimensions(cm) {
+    var d = cm.display, left = {}, width = {};
+    var gutterLeft = d.gutters.clientLeft;
+    for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+      left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft;
+      width[cm.options.gutters[i]] = n.clientWidth;
+    }
+    return {fixedPos: compensateForHScroll(d),
+            gutterTotalWidth: d.gutters.offsetWidth,
+            gutterLeft: left,
+            gutterWidth: width,
+            wrapperWidth: d.wrapper.clientWidth};
+  }
+
+  // Sync the actual display DOM structure with display.view, removing
+  // nodes for lines that are no longer in view, and creating the ones
+  // that are not there yet, and updating the ones that are out of
+  // date.
+  function patchDisplay(cm, updateNumbersFrom, dims) {
+    var display = cm.display, lineNumbers = cm.options.lineNumbers;
+    var container = display.lineDiv, cur = container.firstChild;
+
+    function rm(node) {
+      var next = node.nextSibling;
+      // Works around a throw-scroll bug in OS X Webkit
+      if (webkit && mac && cm.display.currentWheelTarget == node)
+        node.style.display = "none";
+      else
+        node.parentNode.removeChild(node);
+      return next;
+    }
+
+    var view = display.view, lineN = display.viewFrom;
+    // Loop over the elements in the view, syncing cur (the DOM nodes
+    // in display.lineDiv) with the view as we go.
+    for (var i = 0; i < view.length; i++) {
+      var lineView = view[i];
+      if (lineView.hidden) {
+      } else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
+        var node = buildLineElement(cm, lineView, lineN, dims);
+        container.insertBefore(node, cur);
+      } else { // Already drawn
+        while (cur != lineView.node) cur = rm(cur);
+        var updateNumber = lineNumbers && updateNumbersFrom != null &&
+          updateNumbersFrom <= lineN && lineView.lineNumber;
+        if (lineView.changes) {
+          if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false;
+          updateLineForChanges(cm, lineView, lineN, dims);
+        }
+        if (updateNumber) {
+          removeChildren(lineView.lineNumber);
+          lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
+        }
+        cur = lineView.node.nextSibling;
+      }
+      lineN += lineView.size;
+    }
+    while (cur) cur = rm(cur);
+  }
+
+  // When an aspect of a line changes, a string is added to
+  // lineView.changes. This updates the relevant part of the line's
+  // DOM structure.
+  function updateLineForChanges(cm, lineView, lineN, dims) {
+    for (var j = 0; j < lineView.changes.length; j++) {
+      var type = lineView.changes[j];
+      if (type == "text") updateLineText(cm, lineView);
+      else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims);
+      else if (type == "class") updateLineClasses(lineView);
+      else if (type == "widget") updateLineWidgets(cm, lineView, dims);
+    }
+    lineView.changes = null;
+  }
+
+  // Lines with gutter elements, widgets or a background class need to
+  // be wrapped, and have the extra elements added to the wrapper div
+  function ensureLineWrapped(lineView) {
+    if (lineView.node == lineView.text) {
+      lineView.node = elt("div", null, null, "position: relative");
+      if (lineView.text.parentNode)
+        lineView.text.parentNode.replaceChild(lineView.node, lineView.text);
+      lineView.node.appendChild(lineView.text);
+      if (ie && ie_version < 8) lineView.node.style.zIndex = 2;
+    }
+    return lineView.node;
+  }
+
+  function updateLineBackground(lineView) {
+    var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
+    if (cls) cls += " CodeMirror-linebackground";
+    if (lineView.background) {
+      if (cls) lineView.background.className = cls;
+      else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
+    } else if (cls) {
+      var wrap = ensureLineWrapped(lineView);
+      lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
+    }
+  }
+
+  // Wrapper around buildLineContent which will reuse the structure
+  // in display.externalMeasured when possible.
+  function getLineContent(cm, lineView) {
+    var ext = cm.display.externalMeasured;
+    if (ext && ext.line == lineView.line) {
+      cm.display.externalMeasured = null;
+      lineView.measure = ext.measure;
+      return ext.built;
+    }
+    return buildLineContent(cm, lineView);
+  }
+
+  // Redraw the line's text. Interacts with the background and text
+  // classes because the mode may output tokens that influence these
+  // classes.
+  function updateLineText(cm, lineView) {
+    var cls = lineView.text.className;
+    var built = getLineContent(cm, lineView);
+    if (lineView.text == lineView.node) lineView.node = built.pre;
+    lineView.text.parentNode.replaceChild(built.pre, lineView.text);
+    lineView.text = built.pre;
+    if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
+      lineView.bgClass = built.bgClass;
+      lineView.textClass = built.textClass;
+      updateLineClasses(lineView);
+    } else if (cls) {
+      lineView.text.className = cls;
+    }
+  }
+
+  function updateLineClasses(lineView) {
+    updateLineBackground(lineView);
+    if (lineView.line.wrapClass)
+      ensureLineWrapped(lineView).className = lineView.line.wrapClass;
+    else if (lineView.node != lineView.text)
+      lineView.node.className = "";
+    var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
+    lineView.text.className = textClass || "";
+  }
+
+  function updateLineGutter(cm, lineView, lineN, dims) {
+    if (lineView.gutter) {
+      lineView.node.removeChild(lineView.gutter);
+      lineView.gutter = null;
+    }
+    if (lineView.gutterBackground) {
+      lineView.node.removeChild(lineView.gutterBackground);
+      lineView.gutterBackground = null;
+    }
+    if (lineView.line.gutterClass) {
+      var wrap = ensureLineWrapped(lineView);
+      lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+                                      "left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) +
+                                      "px; width: " + dims.gutterTotalWidth + "px");
+      wrap.insertBefore(lineView.gutterBackground, lineView.text);
+    }
+    var markers = lineView.line.gutterMarkers;
+    if (cm.options.lineNumbers || markers) {
+      var wrap = ensureLineWrapped(lineView);
+      var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", "left: " +
+                                             (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px");
+      cm.display.input.setUneditable(gutterWrap);
+      wrap.insertBefore(gutterWrap, lineView.text);
+      if (lineView.line.gutterClass)
+        gutterWrap.className += " " + lineView.line.gutterClass;
+      if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
+        lineView.lineNumber = gutterWrap.appendChild(
+          elt("div", lineNumberFor(cm.options, lineN),
+              "CodeMirror-linenumber CodeMirror-gutter-elt",
+              "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
+              + cm.display.lineNumInnerWidth + "px"));
+      if (markers) for (var k = 0; k < cm.options.gutters.length; ++k) {
+        var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
+        if (found)
+          gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
+                                     dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
+      }
+    }
+  }
+
+  function updateLineWidgets(cm, lineView, dims) {
+    if (lineView.alignable) lineView.alignable = null;
+    for (var node = lineView.node.firstChild, next; node; node = next) {
+      var next = node.nextSibling;
+      if (node.className == "CodeMirror-linewidget")
+        lineView.node.removeChild(node);
+    }
+    insertLineWidgets(cm, lineView, dims);
+  }
+
+  // Build a line's DOM representation from scratch
+  function buildLineElement(cm, lineView, lineN, dims) {
+    var built = getLineContent(cm, lineView);
+    lineView.text = lineView.node = built.pre;
+    if (built.bgClass) lineView.bgClass = built.bgClass;
+    if (built.textClass) lineView.textClass = built.textClass;
+
+    updateLineClasses(lineView);
+    updateLineGutter(cm, lineView, lineN, dims);
+    insertLineWidgets(cm, lineView, dims);
+    return lineView.node;
+  }
+
+  // A lineView may contain multiple logical lines (when merged by
+  // collapsed spans). The widgets for all of them need to be drawn.
+  function insertLineWidgets(cm, lineView, dims) {
+    insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
+    if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
+      insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false);
+  }
+
+  function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
+    if (!line.widgets) return;
+    var wrap = ensureLineWrapped(lineView);
+    for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
+      var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
+      if (!widget.handleMouseEvents) node.setAttribute("cm-ignore-events", "true");
+      positionLineWidget(widget, node, lineView, dims);
+      cm.display.input.setUneditable(node);
+      if (allowAbove && widget.above)
+        wrap.insertBefore(node, lineView.gutter || lineView.text);
+      else
+        wrap.appendChild(node);
+      signalLater(widget, "redraw");
+    }
+  }
+
+  function positionLineWidget(widget, node, lineView, dims) {
+    if (widget.noHScroll) {
+      (lineView.alignable || (lineView.alignable = [])).push(node);
+      var width = dims.wrapperWidth;
+      node.style.left = dims.fixedPos + "px";
+      if (!widget.coverGutter) {
+        width -= dims.gutterTotalWidth;
+        node.style.paddingLeft = dims.gutterTotalWidth + "px";
+      }
+      node.style.width = width + "px";
+    }
+    if (widget.coverGutter) {
+      node.style.zIndex = 5;
+      node.style.position = "relative";
+      if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";
+    }
+  }
+
+  // POSITION OBJECT
+
+  // A Pos instance represents a position within the text.
+  var Pos = CodeMirror.Pos = function(line, ch) {
+    if (!(this instanceof Pos)) return new Pos(line, ch);
+    this.line = line; this.ch = ch;
+  };
+
+  // Compare two positions, return 0 if they are the same, a negative
+  // number when a is less, and a positive number otherwise.
+  var cmp = CodeMirror.cmpPos = function(a, b) { return a.line - b.line || a.ch - b.ch; };
+
+  function copyPos(x) {return Pos(x.line, x.ch);}
+  function maxPos(a, b) { return cmp(a, b) < 0 ? b : a; }
+  function minPos(a, b) { return cmp(a, b) < 0 ? a : b; }
+
+  // INPUT HANDLING
+
+  function ensureFocus(cm) {
+    if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
+  }
+
+  // This will be set to a {lineWise: bool, text: [string]} object, so
+  // that, when pasting, we know what kind of selections the copied
+  // text was made out of.
+  var lastCopied = null;
+
+  function applyTextInput(cm, inserted, deleted, sel, origin) {
+    var doc = cm.doc;
+    cm.display.shift = false;
+    if (!sel) sel = doc.sel;
+
+    var paste = cm.state.pasteIncoming || origin == "paste";
+    var textLines = doc.splitLines(inserted), multiPaste = null
+    // When pasing N lines into N selections, insert one line per selection
+    if (paste && sel.ranges.length > 1) {
+      if (lastCopied && lastCopied.text.join("\n") == inserted) {
+        if (sel.ranges.length % lastCopied.text.length == 0) {
+          multiPaste = [];
+          for (var i = 0; i < lastCopied.text.length; i++)
+            multiPaste.push(doc.splitLines(lastCopied.text[i]));
+        }
+      } else if (textLines.length == sel.ranges.length) {
+        multiPaste = map(textLines, function(l) { return [l]; });
+      }
+    }
+
+    // Normal behavior is to insert the new text into every selection
+    for (var i = sel.ranges.length - 1; i >= 0; i--) {
+      var range = sel.ranges[i];
+      var from = range.from(), to = range.to();
+      if (range.empty()) {
+        if (deleted && deleted > 0) // Handle deletion
+          from = Pos(from.line, from.ch - deleted);
+        else if (cm.state.overwrite && !paste) // Handle overwrite
+          to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length));
+        else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
+          from = to = Pos(from.line, 0)
+      }
+      var updateInput = cm.curOp.updateInput;
+      var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i % multiPaste.length] : textLines,
+                         origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")};
+      makeChange(cm.doc, changeEvent);
+      signalLater(cm, "inputRead", cm, changeEvent);
+    }
+    if (inserted && !paste)
+      triggerElectric(cm, inserted);
+
+    ensureCursorVisible(cm);
+    cm.curOp.updateInput = updateInput;
+    cm.curOp.typing = true;
+    cm.state.pasteIncoming = cm.state.cutIncoming = false;
+  }
+
+  function handlePaste(e, cm) {
+    var pasted = e.clipboardData && e.clipboardData.getData("text/plain");
+    if (pasted) {
+      e.preventDefault();
+      if (!cm.isReadOnly() && !cm.options.disableInput)
+        runInOp(cm, function() { applyTextInput(cm, pasted, 0, null, "paste"); });
+      return true;
+    }
+  }
+
+  function triggerElectric(cm, inserted) {
+    // When an 'electric' character is inserted, immediately trigger a reindent
+    if (!cm.options.electricChars || !cm.options.smartIndent) return;
+    var sel = cm.doc.sel;
+
+    for (var i = sel.ranges.length - 1; i >= 0; i--) {
+      var range = sel.ranges[i];
+      if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) continue;
+      var mode = cm.getModeAt(range.head);
+      var indented = false;
+      if (mode.electricChars) {
+        for (var j = 0; j < mode.electricChars.length; j++)
+          if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+            indented = indentLine(cm, range.head.line, "smart");
+            break;
+          }
+      } else if (mode.electricInput) {
+        if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
+          indented = indentLine(cm, range.head.line, "smart");
+      }
+      if (indented) signalLater(cm, "electricInput", cm, range.head.line);
+    }
+  }
+
+  function copyableRanges(cm) {
+    var text = [], ranges = [];
+    for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
+      var line = cm.doc.sel.ranges[i].head.line;
+      var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
+      ranges.push(lineRange);
+      text.push(cm.getRange(lineRange.anchor, lineRange.head));
+    }
+    return {text: text, ranges: ranges};
+  }
+
+  function disableBrowserMagic(field) {
+    field.setAttribute("autocorrect", "off");
+    field.setAttribute("autocapitalize", "off");
+    field.setAttribute("spellcheck", "false");
+  }
+
+  // TEXTAREA INPUT STYLE
+
+  function TextareaInput(cm) {
+    this.cm = cm;
+    // See input.poll and input.reset
+    this.prevInput = "";
+
+    // Flag that indicates whether we expect input to appear real soon
+    // now (after some event like 'keypress' or 'input') and are
+    // polling intensively.
+    this.pollingFast = false;
+    // Self-resetting timeout for the poller
+    this.polling = new Delayed();
+    // Tracks when input.reset has punted to just putting a short
+    // string into the textarea instead of the full selection.
+    this.inaccurateSelection = false;
+    // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+    this.hasSelection = false;
+    this.composing = null;
+  };
+
+  function hiddenTextarea() {
+    var te = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none");
+    var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
+    // The textarea is kept positioned near the cursor to prevent the
+    // fact that it'll be scrolled into view on input from scrolling
+    // our fake cursor out of view. On webkit, when wrap=off, paste is
+    // very slow. So make the area wide instead.
+    if (webkit) te.style.width = "1000px";
+    else te.setAttribute("wrap", "off");
+    // If border: 0; -- iOS fails to open keyboard (issue #1287)
+    if (ios) te.style.border = "1px solid black";
+    disableBrowserMagic(te);
+    return div;
+  }
+
+  TextareaInput.prototype = copyObj({
+    init: function(display) {
+      var input = this, cm = this.cm;
+
+      // Wraps and hides input textarea
+      var div = this.wrapper = hiddenTextarea();
+      // The semihidden textarea that is focused when the editor is
+      // focused, and receives input.
+      var te = this.textarea = div.firstChild;
+      display.wrapper.insertBefore(div, display.wrapper.firstChild);
+
+      // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+      if (ios) te.style.width = "0px";
+
+      on(te, "input", function() {
+        if (ie && ie_version >= 9 && input.hasSelection) input.hasSelection = null;
+        input.poll();
+      });
+
+      on(te, "paste", function(e) {
+        if (signalDOMEvent(cm, e) || handlePaste(e, cm)) return
+
+        cm.state.pasteIncoming = true;
+        input.fastPoll();
+      });
+
+      function prepareCopyCut(e) {
+        if (signalDOMEvent(cm, e)) return
+        if (cm.somethingSelected()) {
+          lastCopied = {lineWise: false, text: cm.getSelections()};
+          if (input.inaccurateSelection) {
+            input.prevInput = "";
+            input.inaccurateSelection = false;
+            te.value = lastCopied.text.join("\n");
+            selectInput(te);
+          }
+        } else if (!cm.options.lineWiseCopyCut) {
+          return;
+        } else {
+          var ranges = copyableRanges(cm);
+          lastCopied = {lineWise: true, text: ranges.text};
+          if (e.type == "cut") {
+            cm.setSelections(ranges.ranges, null, sel_dontScroll);
+          } else {
+            input.prevInput = "";
+            te.value = ranges.text.join("\n");
+            selectInput(te);
+          }
+        }
+        if (e.type == "cut") cm.state.cutIncoming = true;
+      }
+      on(te, "cut", prepareCopyCut);
+      on(te, "copy", prepareCopyCut);
+
+      on(display.scroller, "paste", function(e) {
+        if (eventInWidget(display, e) || signalDOMEvent(cm, e)) return;
+        cm.state.pasteIncoming = true;
+        input.focus();
+      });
+
+      // Prevent normal selection in the editor (we handle our own)
+      on(display.lineSpace, "selectstart", function(e) {
+        if (!eventInWidget(display, e)) e_preventDefault(e);
+      });
+
+      on(te, "compositionstart", function() {
+        var start = cm.getCursor("from");
+        if (input.composing) input.composing.range.clear()
+        input.composing = {
+          start: start,
+          range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+        };
+      });
+      on(te, "compositionend", function() {
+        if (input.composing) {
+          input.poll();
+          input.composing.range.clear();
+          input.composing = null;
+        }
+      });
+    },
+
+    prepareSelection: function() {
+      // Redraw the selection and/or cursor
+      var cm = this.cm, display = cm.display, doc = cm.doc;
+      var result = prepareSelection(cm);
+
+      // Move the hidden textarea near the cursor to prevent scrolling artifacts
+      if (cm.options.moveInputWithCursor) {
+        var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
+        var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
+        result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+                                            headPos.top + lineOff.top - wrapOff.top));
+        result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+                                             headPos.left + lineOff.left - wrapOff.left));
+      }
+
+      return result;
+    },
+
+    showSelection: function(drawn) {
+      var cm = this.cm, display = cm.display;
+      removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
+      removeChildrenAndAdd(display.selectionDiv, drawn.selection);
+      if (drawn.teTop != null) {
+        this.wrapper.style.top = drawn.teTop + "px";
+        this.wrapper.style.left = drawn.teLeft + "px";
+      }
+    },
+
+    // Reset the input to correspond to the selection (or to be empty,
+    // when not typing and nothing is selected)
+    reset: function(typing) {
+      if (this.contextMenuPending) return;
+      var minimal, selected, cm = this.cm, doc = cm.doc;
+      if (cm.somethingSelected()) {
+        this.prevInput = "";
+        var range = doc.sel.primary();
+        minimal = hasCopyEvent &&
+          (range.to().line - range.from().line > 100 || (selected = cm.getSelection()).length > 1000);
+        var content = minimal ? "-" : selected || cm.getSelection();
+        this.textarea.value = content;
+        if (cm.state.focused) selectInput(this.textarea);
+        if (ie && ie_version >= 9) this.hasSelection = content;
+      } else if (!typing) {
+        this.prevInput = this.textarea.value = "";
+        if (ie && ie_version >= 9) this.hasSelection = null;
+      }
+      this.inaccurateSelection = minimal;
+    },
+
+    getField: function() { return this.textarea; },
+
+    supportsTouch: function() { return false; },
+
+    focus: function() {
+      if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
+        try { this.textarea.focus(); }
+        catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+      }
+    },
+
+    blur: function() { this.textarea.blur(); },
+
+    resetPosition: function() {
+      this.wrapper.style.top = this.wrapper.style.left = 0;
+    },
+
+    receivedFocus: function() { this.slowPoll(); },
+
+    // Poll for input changes, using the normal rate of polling. This
+    // runs as long as the editor is focused.
+    slowPoll: function() {
+      var input = this;
+      if (input.pollingFast) return;
+      input.polling.set(this.cm.options.pollInterval, function() {
+        input.poll();
+        if (input.cm.state.focused) input.slowPoll();
+      });
+    },
+
+    // When an event has just come in that is likely to add or change
+    // something in the input textarea, we poll faster, to ensure that
+    // the change appears on the screen quickly.
+    fastPoll: function() {
+      var missed = false, input = this;
+      input.pollingFast = true;
+      function p() {
+        var changed = input.poll();
+        if (!changed && !missed) {missed = true; input.polling.set(60, p);}
+        else {input.pollingFast = false; input.slowPoll();}
+      }
+      input.polling.set(20, p);
+    },
+
+    // Read input from the textarea, and update the document to match.
+    // When something is selected, it is present in the textarea, and
+    // selected (unless it is huge, in which case a placeholder is
+    // used). When nothing is selected, the cursor sits after previously
+    // seen text (can be empty), which is stored in prevInput (we must
+    // not reset the textarea when typing, because that breaks IME).
+    poll: function() {
+      var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
+      // Since this is called a *lot*, try to bail out as cheaply as
+      // possible when it is clear that nothing happened. hasSelection
+      // will be the case when there is a lot of text in the textarea,
+      // in which case reading its value would be expensive.
+      if (this.contextMenuPending || !cm.state.focused ||
+          (hasSelection(input) && !prevInput && !this.composing) ||
+          cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+        return false;
+
+      var text = input.value;
+      // If nothing changed, bail.
+      if (text == prevInput && !cm.somethingSelected()) return false;
+      // Work around nonsensical selection resetting in IE9/10, and
+      // inexplicable appearance of private area unicode characters on
+      // some key combos in Mac (#2689).
+      if (ie && ie_version >= 9 && this.hasSelection === text ||
+          mac && /[\uf700-\uf7ff]/.test(text)) {
+        cm.display.input.reset();
+        return false;
+      }
+
+      if (cm.doc.sel == cm.display.selForContextMenu) {
+        var first = text.charCodeAt(0);
+        if (first == 0x200b && !prevInput) prevInput = "\u200b";
+        if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo"); }
+      }
+      // Find the part of the input that is actually new
+      var same = 0, l = Math.min(prevInput.length, text.length);
+      while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same;
+
+      var self = this;
+      runInOp(cm, function() {
+        applyTextInput(cm, text.slice(same), prevInput.length - same,
+                       null, self.composing ? "*compose" : null);
+
+        // Don't leave long text in the textarea, since it makes further polling slow
+        if (text.length > 1000 || text.indexOf("\n") > -1) input.value = self.prevInput = "";
+        else self.prevInput = text;
+
+        if (self.composing) {
+          self.composing.range.clear();
+          self.composing.range = cm.markText(self.composing.start, cm.getCursor("to"),
+                                             {className: "CodeMirror-composing"});
+        }
+      });
+      return true;
+    },
+
+    ensurePolled: function() {
+      if (this.pollingFast && this.poll()) this.pollingFast = false;
+    },
+
+    onKeyPress: function() {
+      if (ie && ie_version >= 9) this.hasSelection = null;
+      this.fastPoll();
+    },
+
+    onContextMenu: function(e) {
+      var input = this, cm = input.cm, display = cm.display, te = input.textarea;
+      var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
+      if (!pos || presto) return; // Opera is difficult.
+
+      // Reset the current text selection only if the click is done outside of the selection
+      // and 'resetSelectionOnContextMenu' option is true.
+      var reset = cm.options.resetSelectionOnContextMenu;
+      if (reset && cm.doc.sel.contains(pos) == -1)
+        operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll);
+
+      var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
+      input.wrapper.style.cssText = "position: absolute"
+      var wrapperBox = input.wrapper.getBoundingClientRect()
+      te.style.cssText = "position: absolute; width: 30px; height: 30px; top: " + (e.clientY - wrapperBox.top - 5) +
+        "px; left: " + (e.clientX - wrapperBox.left - 5) + "px; z-index: 1000; background: " +
+        (ie ? "rgba(255, 255, 255, .05)" : "transparent") +
+        "; outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
+      if (webkit) var oldScrollY = window.scrollY; // Work around Chrome issue (#2712)
+      display.input.focus();
+      if (webkit) window.scrollTo(null, oldScrollY);
+      display.input.reset();
+      // Adds "Select all" to context menu in FF
+      if (!cm.somethingSelected()) te.value = input.prevInput = " ";
+      input.contextMenuPending = true;
+      display.selForContextMenu = cm.doc.sel;
+      clearTimeout(display.detectingSelectAll);
+
+      // Select-all will be greyed out if there's nothing to select, so
+      // this adds a zero-width space so that we can later check whether
+      // it got selected.
+      function prepareSelectAllHack() {
+        if (te.selectionStart != null) {
+          var selected = cm.somethingSelected();
+          var extval = "\u200b" + (selected ? te.value : "");
+          te.value = "\u21da"; // Used to catch context-menu undo
+          te.value = extval;
+          input.prevInput = selected ? "" : "\u200b";
+          te.selectionStart = 1; te.selectionEnd = extval.length;
+          // Re-set this, in case some other handler touched the
+          // selection in the meantime.
+          display.selForContextMenu = cm.doc.sel;
+        }
+      }
+      function rehide() {
+        input.contextMenuPending = false;
+        input.wrapper.style.cssText = oldWrapperCSS
+        te.style.cssText = oldCSS;
+        if (ie && ie_version < 9) display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos);
+
+        // Try to detect the user choosing select-all
+        if (te.selectionStart != null) {
+          if (!ie || (ie && ie_version < 9)) prepareSelectAllHack();
+          var i = 0, poll = function() {
+            if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+                te.selectionEnd > 0 && input.prevInput == "\u200b")
+              operation(cm, commands.selectAll)(cm);
+            else if (i++ < 10) display.detectingSelectAll = setTimeout(poll, 500);
+            else display.input.reset();
+          };
+          display.detectingSelectAll = setTimeout(poll, 200);
+        }
+      }
+
+      if (ie && ie_version >= 9) prepareSelectAllHack();
+      if (captureRightClick) {
+        e_stop(e);
+        var mouseup = function() {
+          off(window, "mouseup", mouseup);
+          setTimeout(rehide, 20);
+        };
+        on(window, "mouseup", mouseup);
+      } else {
+        setTimeout(rehide, 50);
+      }
+    },
+
+    readOnlyChanged: function(val) {
+      if (!val) this.reset();
+    },
+
+    setUneditable: nothing,
+
+    needsContentAttribute: false
+  }, TextareaInput.prototype);
+
+  // CONTENTEDITABLE INPUT STYLE
+
+  function ContentEditableInput(cm) {
+    this.cm = cm;
+    this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
+    this.polling = new Delayed();
+    this.gracePeriod = false;
+  }
+
+  ContentEditableInput.prototype = copyObj({
+    init: function(display) {
+      var input = this, cm = input.cm;
+      var div = input.div = display.lineDiv;
+      disableBrowserMagic(div);
+
+      on(div, "paste", function(e) {
+        if (!signalDOMEvent(cm, e)) handlePaste(e, cm);
+      })
+
+      on(div, "compositionstart", function(e) {
+        var data = e.data;
+        input.composing = {sel: cm.doc.sel, data: data, startData: data};
+        if (!data) return;
+        var prim = cm.doc.sel.primary();
+        var line = cm.getLine(prim.head.line);
+        var found = line.indexOf(data, Math.max(0, prim.head.ch - data.length));
+        if (found > -1 && found <= prim.head.ch)
+          input.composing.sel = simpleSelection(Pos(prim.head.line, found),
+                                                Pos(prim.head.line, found + data.length));
+      });
+      on(div, "compositionupdate", function(e) {
+        input.composing.data = e.data;
+      });
+      on(div, "compositionend", function(e) {
+        var ours = input.composing;
+        if (!ours) return;
+        if (e.data != ours.startData && !/\u200b/.test(e.data))
+          ours.data = e.data;
+        // Need a small delay to prevent other code (input event,
+        // selection polling) from doing damage when fired right after
+        // compositionend.
+        setTimeout(function() {
+          if (!ours.handled)
+            input.applyComposition(ours);
+          if (input.composing == ours)
+            input.composing = null;
+        }, 50);
+      });
+
+      on(div, "touchstart", function() {
+        input.forceCompositionEnd();
+      });
+
+      on(div, "input", function() {
+        if (input.composing) return;
+        if (cm.isReadOnly() || !input.pollContent())
+          runInOp(input.cm, function() {regChange(cm);});
+      });
+
+      function onCopyCut(e) {
+        if (signalDOMEvent(cm, e)) return
+        if (cm.somethingSelected()) {
+          lastCopied = {lineWise: false, text: cm.getSelections()};
+          if (e.type == "cut") cm.replaceSelection("", null, "cut");
+        } else if (!cm.options.lineWiseCopyCut) {
+          return;
+        } else {
+          var ranges = copyableRanges(cm);
+          lastCopied = {lineWise: true, text: ranges.text};
+          if (e.type == "cut") {
+            cm.operation(function() {
+              cm.setSelections(ranges.ranges, 0, sel_dontScroll);
+              cm.replaceSelection("", null, "cut");
+            });
+          }
+        }
+        // iOS exposes the clipboard API, but seems to discard content inserted into it
+        if (e.clipboardData && !ios) {
+          e.preventDefault();
+          e.clipboardData.clearData();
+          e.clipboardData.setData("text/plain", lastCopied.text.join("\n"));
+        } else {
+          // Old-fashioned briefly-focus-a-textarea hack
+          var kludge = hiddenTextarea(), te = kludge.firstChild;
+          cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
+          te.value = lastCopied.text.join("\n");
+          var hadFocus = document.activeElement;
+          selectInput(te);
+          setTimeout(function() {
+            cm.display.lineSpace.removeChild(kludge);
+            hadFocus.focus();
+          }, 50);
+        }
+      }
+      on(div, "copy", onCopyCut);
+      on(div, "cut", onCopyCut);
+    },
+
+    prepareSelection: function() {
+      var result = prepareSelection(this.cm, false);
+      result.focus = this.cm.state.focused;
+      return result;
+    },
+
+    showSelection: function(info, takeFocus) {
+      if (!info || !this.cm.display.view.length) return;
+      if (info.focus || takeFocus) this.showPrimarySelection();
+      this.showMultipleSelections(info);
+    },
+
+    showPrimarySelection: function() {
+      var sel = window.getSelection(), prim = this.cm.doc.sel.primary();
+      var curAnchor = domToPos(this.cm, sel.anchorNode, sel.anchorOffset);
+      var curFocus = domToPos(this.cm, sel.focusNode, sel.focusOffset);
+      if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+          cmp(minPos(curAnchor, curFocus), prim.from()) == 0 &&
+          cmp(maxPos(curAnchor, curFocus), prim.to()) == 0)
+        return;
+
+      var start = posToDOM(this.cm, prim.from());
+      var end = posToDOM(this.cm, prim.to());
+      if (!start && !end) return;
+
+      var view = this.cm.display.view;
+      var old = sel.rangeCount && sel.getRangeAt(0);
+      if (!start) {
+        start = {node: view[0].measure.map[2], offset: 0};
+      } else if (!end) { // FIXME dangerously hacky
+        var measure = view[view.length - 1].measure;
+        var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
+        end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]};
+      }
+
+      try { var rng = range(start.node, start.offset, end.offset, end.node); }
+      catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+      if (rng) {
+        if (!gecko && this.cm.state.focused) {
+          sel.collapse(start.node, start.offset);
+          if (!rng.collapsed) sel.addRange(rng);
+        } else {
+          sel.removeAllRanges();
+          sel.addRange(rng);
+        }
+        if (old && sel.anchorNode == null) sel.addRange(old);
+        else if (gecko) this.startGracePeriod();
+      }
+      this.rememberSelection();
+    },
+
+    startGracePeriod: function() {
+      var input = this;
+      clearTimeout(this.gracePeriod);
+      this.gracePeriod = setTimeout(function() {
+        input.gracePeriod = false;
+        if (input.selectionChanged())
+          input.cm.operation(function() { input.cm.curOp.selectionChanged = true; });
+      }, 20);
+    },
+
+    showMultipleSelections: function(info) {
+      removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
+      removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
+    },
+
+    rememberSelection: function() {
+      var sel = window.getSelection();
+      this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
+      this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
+    },
+
+    selectionInEditor: function() {
+      var sel = window.getSelection();
+      if (!sel.rangeCount) return false;
+      var node = sel.getRangeAt(0).commonAncestorContainer;
+      return contains(this.div, node);
+    },
+
+    focus: function() {
+      if (this.cm.options.readOnly != "nocursor") this.div.focus();
+    },
+    blur: function() { this.div.blur(); },
+    getField: function() { return this.div; },
+
+    supportsTouch: function() { return true; },
+
+    receivedFocus: function() {
+      var input = this;
+      if (this.selectionInEditor())
+        this.pollSelection();
+      else
+        runInOp(this.cm, function() { input.cm.curOp.selectionChanged = true; });
+
+      function poll() {
+        if (input.cm.state.focused) {
+          input.pollSelection();
+          input.polling.set(input.cm.options.pollInterval, poll);
+        }
+      }
+      this.polling.set(this.cm.options.pollInterval, poll);
+    },
+
+    selectionChanged: function() {
+      var sel = window.getSelection();
+      return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+        sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset;
+    },
+
+    pollSelection: function() {
+      if (!this.composing && !this.gracePeriod && this.selectionChanged()) {
+        var sel = window.getSelection(), cm = this.cm;
+        this.rememberSelection();
+        var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
+        var head = domToPos(cm, sel.focusNode, sel.focusOffset);
+        if (anchor && head) runInOp(cm, function() {
+          setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
+          if (anchor.bad || head.bad) cm.curOp.selectionChanged = true;
+        });
+      }
+    },
+
+    pollContent: function() {
+      var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
+      var from = sel.from(), to = sel.to();
+      if (from.line < display.viewFrom || to.line > display.viewTo - 1) return false;
+
+      var fromIndex;
+      if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+        var fromLine = lineNo(display.view[0].line);
+        var fromNode = display.view[0].node;
+      } else {
+        var fromLine = lineNo(display.view[fromIndex].line);
+        var fromNode = display.view[fromIndex - 1].node.nextSibling;
+      }
+      var toIndex = findViewIndex(cm, to.line);
+      if (toIndex == display.view.length - 1) {
+        var toLine = display.viewTo - 1;
+        var toNode = display.lineDiv.lastChild;
+      } else {
+        var toLine = lineNo(display.view[toIndex + 1].line) - 1;
+        var toNode = display.view[toIndex + 1].node.previousSibling;
+      }
+
+      var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
+      var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
+      while (newText.length > 1 && oldText.length > 1) {
+        if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
+        else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
+        else break;
+      }
+
+      var cutFront = 0, cutEnd = 0;
+      var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
+      while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+        ++cutFront;
+      var newBot = lst(newText), oldBot = lst(oldText);
+      var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+                               oldBot.length - (oldText.length == 1 ? cutFront : 0));
+      while (cutEnd < maxCutEnd &&
+             newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+        ++cutEnd;
+
+      newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd);
+      newText[0] = newText[0].slice(cutFront);
+
+      var chFrom = Pos(fromLine, cutFront);
+      var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
+      if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+        replaceRange(cm.doc, newText, chFrom, chTo, "+input");
+        return true;
+      }
+    },
+
+    ensurePolled: function() {
+      this.forceCompositionEnd();
+    },
+    reset: function() {
+      this.forceCompositionEnd();
+    },
+    forceCompositionEnd: function() {
+      if (!this.composing || this.composing.handled) return;
+      this.applyComposition(this.composing);
+      this.composing.handled = true;
+      this.div.blur();
+      this.div.focus();
+    },
+    applyComposition: function(composing) {
+      if (this.cm.isReadOnly())
+        operation(this.cm, regChange)(this.cm)
+      else if (composing.data && composing.data != composing.startData)
+        operation(this.cm, applyTextInput)(this.cm, composing.data, 0, composing.sel);
+    },
+
+    setUneditable: function(node) {
+      node.contentEditable = "false"
+    },
+
+    onKeyPress: function(e) {
+      e.preventDefault();
+      if (!this.cm.isReadOnly())
+        operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0);
+    },
+
+    readOnlyChanged: function(val) {
+      this.div.contentEditable = String(val != "nocursor")
+    },
+
+    onContextMenu: nothing,
+    resetPosition: nothing,
+
+    needsContentAttribute: true
+  }, ContentEditableInput.prototype);
+
+  function posToDOM(cm, pos) {
+    var view = findViewForLine(cm, pos.line);
+    if (!view || view.hidden) return null;
+    var line = getLine(cm.doc, pos.line);
+    var info = mapFromLineView(view, line, pos.line);
+
+    var order = getOrder(line), side = "left";
+    if (order) {
+      var partPos = getBidiPartAt(order, pos.ch);
+      side = partPos % 2 ? "right" : "left";
+    }
+    var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
+    result.offset = result.collapse == "right" ? result.end : result.start;
+    return result;
+  }
+
+  function badPos(pos, bad) { if (bad) pos.bad = true; return pos; }
+
+  function domToPos(cm, node, offset) {
+    var lineNode;
+    if (node == cm.display.lineDiv) {
+      lineNode = cm.display.lineDiv.childNodes[offset];
+      if (!lineNode) return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true);
+      node = null; offset = 0;
+    } else {
+      for (lineNode = node;; lineNode = lineNode.parentNode) {
+        if (!lineNode || lineNode == cm.display.lineDiv) return null;
+        if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) break;
+      }
+    }
+    for (var i = 0; i < cm.display.view.length; i++) {
+      var lineView = cm.display.view[i];
+      if (lineView.node == lineNode)
+        return locateNodeInLineView(lineView, node, offset);
+    }
+  }
+
+  function locateNodeInLineView(lineView, node, offset) {
+    var wrapper = lineView.text.firstChild, bad = false;
+    if (!node || !contains(wrapper, node)) return badPos(Pos(lineNo(lineView.line), 0), true);
+    if (node == wrapper) {
+      bad = true;
+      node = wrapper.childNodes[offset];
+      offset = 0;
+      if (!node) {
+        var line = lineView.rest ? lst(lineView.rest) : lineView.line;
+        return badPos(Pos(lineNo(line), line.text.length), bad);
+      }
+    }
+
+    var textNode = node.nodeType == 3 ? node : null, topNode = node;
+    if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+      textNode = node.firstChild;
+      if (offset) offset = textNode.nodeValue.length;
+    }
+    while (topNode.parentNode != wrapper) topNode = topNode.parentNode;
+    var measure = lineView.measure, maps = measure.maps;
+
+    function find(textNode, topNode, offset) {
+      for (var i = -1; i < (maps ? maps.length : 0); i++) {
+        var map = i < 0 ? measure.map : maps[i];
+        for (var j = 0; j < map.length; j += 3) {
+          var curNode = map[j + 2];
+          if (curNode == textNode || curNode == topNode) {
+            var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
+            var ch = map[j] + offset;
+            if (offset < 0 || curNode != textNode) ch = map[j + (offset ? 1 : 0)];
+            return Pos(line, ch);
+          }
+        }
+      }
+    }
+    var found = find(textNode, topNode, offset);
+    if (found) return badPos(found, bad);
+
+    // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+    for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+      found = find(after, after.firstChild, 0);
+      if (found)
+        return badPos(Pos(found.line, found.ch - dist), bad);
+      else
+        dist += after.textContent.length;
+    }
+    for (var before = topNode.previousSibling, dist = offset; before; before = before.previousSibling) {
+      found = find(before, before.firstChild, -1);
+      if (found)
+        return badPos(Pos(found.line, found.ch + dist), bad);
+      else
+        dist += after.textContent.length;
+    }
+  }
+
+  function domTextBetween(cm, from, to, fromLine, toLine) {
+    var text = "", closing = false, lineSep = cm.doc.lineSeparator();
+    function recognizeMarker(id) { return function(marker) { return marker.id == id; }; }
+    function walk(node) {
+      if (node.nodeType == 1) {
+        var cmText = node.getAttribute("cm-text");
+        if (cmText != null) {
+          if (cmText == "") cmText = node.textContent.replace(/\u200b/g, "");
+          text += cmText;
+          return;
+        }
+        var markerID = node.getAttribute("cm-marker"), range;
+        if (markerID) {
+          var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
+          if (found.length && (range = found[0].find()))
+            text += getBetween(cm.doc, range.from, range.to).join(lineSep);
+          return;
+        }
+        if (node.getAttribute("contenteditable") == "false") return;
+        for (var i = 0; i < node.childNodes.length; i++)
+          walk(node.childNodes[i]);
+        if (/^(pre|div|p)$/i.test(node.nodeName))
+          closing = true;
+      } else if (node.nodeType == 3) {
+        var val = node.nodeValue;
+        if (!val) return;
+        if (closing) {
+          text += lineSep;
+          closing = false;
+        }
+        text += val;
+      }
+    }
+    for (;;) {
+      walk(from);
+      if (from == to) break;
+      from = from.nextSibling;
+    }
+    return text;
+  }
+
+  CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};
+
+  // SELECTION / CURSOR
+
+  // Selection objects are immutable. A new one is created every time
+  // the selection changes. A selection is one or more non-overlapping
+  // (and non-touching) ranges, sorted, and an integer that indicates
+  // which one is the primary selection (the one that's scrolled into
+  // view, that getCursor returns, etc).
+  function Selection(ranges, primIndex) {
+    this.ranges = ranges;
+    this.primIndex = primIndex;
+  }
+
+  Selection.prototype = {
+    primary: function() { return this.ranges[this.primIndex]; },
+    equals: function(other) {
+      if (other == this) return true;
+      if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) return false;
+      for (var i = 0; i < this.ranges.length; i++) {
+        var here = this.ranges[i], there = other.ranges[i];
+        if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) != 0) return false;
+      }
+      return true;
+    },
+    deepCopy: function() {
+      for (var out = [], i = 0; i < this.ranges.length; i++)
+        out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head));
+      return new Selection(out, this.primIndex);
+    },
+    somethingSelected: function() {
+      for (var i = 0; i < this.ranges.length; i++)
+        if (!this.ranges[i].empty()) return true;
+      return false;
+    },
+    contains: function(pos, end) {
+      if (!end) end = pos;
+      for (var i = 0; i < this.ranges.length; i++) {
+        var range = this.ranges[i];
+        if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
+          return i;
+      }
+      return -1;
+    }
+  };
+
+  function Range(anchor, head) {
+    this.anchor = anchor; this.head = head;
+  }
+
+  Range.prototype = {
+    from: function() { return minPos(this.anchor, this.head); },
+    to: function() { return maxPos(this.anchor, this.head); },
+    empty: function() {
+      return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch;
+    }
+  };
+
+  // Take an unsorted, potentially overlapping set of ranges, and
+  // build a selection out of it. 'Consumes' ranges array (modifying
+  // it).
+  function normalizeSelection(ranges, primIndex) {
+    var prim = ranges[primIndex];
+    ranges.sort(function(a, b) { return cmp(a.from(), b.from()); });
+    primIndex = indexOf(ranges, prim);
+    for (var i = 1; i < ranges.length; i++) {
+      var cur = ranges[i], prev = ranges[i - 1];
+      if (cmp(prev.to(), cur.from()) >= 0) {
+        var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
+        var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
+        if (i <= primIndex) --primIndex;
+        ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
+      }
+    }
+    return new Selection(ranges, primIndex);
+  }
+
+  function simpleSelection(anchor, head) {
+    return new Selection([new Range(anchor, head || anchor)], 0);
+  }
+
+  // Most of the external API clips given positions to make sure they
+  // actually exist within the document.
+  function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
+  function clipPos(doc, pos) {
+    if (pos.line < doc.first) return Pos(doc.first, 0);
+    var last = doc.first + doc.size - 1;
+    if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
+    return clipToLen(pos, getLine(doc, pos.line).text.length);
+  }
+  function clipToLen(pos, linelen) {
+    var ch = pos.ch;
+    if (ch == null || ch > linelen) return Pos(pos.line, linelen);
+    else if (ch < 0) return Pos(pos.line, 0);
+    else return pos;
+  }
+  function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
+  function clipPosArray(doc, array) {
+    for (var out = [], i = 0; i < array.length; i++) out[i] = clipPos(doc, array[i]);
+    return out;
+  }
+
+  // SELECTION UPDATES
+
+  // The 'scroll' parameter given to many of these indicated whether
+  // the new cursor position should be scrolled into view after
+  // modifying the selection.
+
+  // If shift is held or the extend flag is set, extends a range to
+  // include a given position (and optionally a second position).
+  // Otherwise, simply returns the range between the given positions.
+  // Used for cursor motion and such.
+  function extendRange(doc, range, head, other) {
+    if (doc.cm && doc.cm.display.shift || doc.extend) {
+      var anchor = range.anchor;
+      if (other) {
+        var posBefore = cmp(head, anchor) < 0;
+        if (posBefore != (cmp(other, anchor) < 0)) {
+          anchor = head;
+          head = other;
+        } else if (posBefore != (cmp(head, other) < 0)) {
+          head = other;
+        }
+      }
+      return new Range(anchor, head);
+    } else {
+      return new Range(other || head, head);
+    }
+  }
+
+  // Extend the primary selection range, discard the rest.
+  function extendSelection(doc, head, other, options) {
+    setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, other)], 0), options);
+  }
+
+  // Extend all selections (pos is an array of selections with length
+  // equal the number of selections)
+  function extendSelections(doc, heads, options) {
+    for (var out = [], i = 0; i < doc.sel.ranges.length; i++)
+      out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null);
+    var newSel = normalizeSelection(out, doc.sel.primIndex);
+    setSelection(doc, newSel, options);
+  }
+
+  // Updates a single range in the selection.
+  function replaceOneSelection(doc, i, range, options) {
+    var ranges = doc.sel.ranges.slice(0);
+    ranges[i] = range;
+    setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options);
+  }
+
+  // Reset the selection to a single range.
+  function setSimpleSelection(doc, anchor, head, options) {
+    setSelection(doc, simpleSelection(anchor, head), options);
+  }
+
+  // Give beforeSelectionChange handlers a change to influence a
+  // selection update.
+  function filterSelectionChange(doc, sel, options) {
+    var obj = {
+      ranges: sel.ranges,
+      update: function(ranges) {
+        this.ranges = [];
+        for (var i = 0; i < ranges.length; i++)
+          this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
+                                     clipPos(doc, ranges[i].head));
+      },
+      origin: options && options.origin
+    };
+    signal(doc, "beforeSelectionChange", doc, obj);
+    if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
+    if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.ranges.length - 1);
+    else return sel;
+  }
+
+  function setSelectionReplaceHistory(doc, sel, options) {
+    var done = doc.history.done, last = lst(done);
+    if (last && last.ranges) {
+      done[done.length - 1] = sel;
+      setSelectionNoUndo(doc, sel, options);
+    } else {
+      setSelection(doc, sel, options);
+    }
+  }
+
+  // Set a new selection.
+  function setSelection(doc, sel, options) {
+    setSelectionNoUndo(doc, sel, options);
+    addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
+  }
+
+  function setSelectionNoUndo(doc, sel, options) {
+    if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+      sel = filterSelectionChange(doc, sel, options);
+
+    var bias = options && options.bias ||
+      (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
+    setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
+
+    if (!(options && options.scroll === false) && doc.cm)
+      ensureCursorVisible(doc.cm);
+  }
+
+  function setSelectionInner(doc, sel) {
+    if (sel.equals(doc.sel)) return;
+
+    doc.sel = sel;
+
+    if (doc.cm) {
+      doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true;
+      signalCursorActivity(doc.cm);
+    }
+    signalLater(doc, "cursorActivity", doc);
+  }
+
+  // Verify that the selection does not partially select any atomic
+  // marked ranges.
+  function reCheckSelection(doc) {
+    setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel_dontScroll);
+  }
+
+  // Return a selection that does not partially select any atomic
+  // ranges.
+  function skipAtomicInSelection(doc, sel, bias, mayClear) {
+    var out;
+    for (var i = 0; i < sel.ranges.length; i++) {
+      var range = sel.ranges[i];
+      var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
+      var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
+      var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
+      if (out || newAnchor != range.anchor || newHead != range.head) {
+        if (!out) out = sel.ranges.slice(0, i);
+        out[i] = new Range(newAnchor, newHead);
+      }
+    }
+    return out ? normalizeSelection(out, sel.primIndex) : sel;
+  }
+
+  function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+    var line = getLine(doc, pos.line);
+    if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
+      var sp = line.markedSpans[i], m = sp.marker;
+      if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+          (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+        if (mayClear) {
+          signal(m, "beforeCursorEnter");
+          if (m.explicitlyCleared) {
+            if (!line.markedSpans) break;
+            else {--i; continue;}
+          }
+        }
+        if (!m.atomic) continue;
+
+        if (oldPos) {
+          var near = m.find(dir < 0 ? 1 : -1), diff;
+          if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
+            near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null);
+          if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+            return skipAtomicInner(doc, near, pos, dir, mayClear);
+        }
+
+        var far = m.find(dir < 0 ? -1 : 1);
+        if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
+          far = movePos(doc, far, dir, far.line == pos.line ? line : null);
+        return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null;
+      }
+    }
+    return pos;
+  }
+
+  // Ensure a given position is not inside an atomic range.
+  function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+    var dir = bias || 1;
+    var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+        skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
+    if (!found) {
+      doc.cantEdit = true;
+      return Pos(doc.first, 0);
+    }
+    return found;
+  }
+
+  function movePos(doc, pos, dir, line) {
+    if (dir < 0 && pos.ch == 0) {
+      if (pos.line > doc.first) return clipPos(doc, Pos(pos.line - 1));
+      else return null;
+    } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+      if (pos.line < doc.first + doc.size - 1) return Pos(pos.line + 1, 0);
+      else return null;
+    } else {
+      return new Pos(pos.line, pos.ch + dir);
+    }
+  }
+
+  // SELECTION DRAWING
+
+  function updateSelection(cm) {
+    cm.display.input.showSelection(cm.display.input.prepareSelection());
+  }
+
+  function prepareSelection(cm, primary) {
+    var doc = cm.doc, result = {};
+    var curFragment = result.cursors = document.createDocumentFragment();
+    var selFragment = result.selection = document.createDocumentFragment();
+
+    for (var i = 0; i < doc.sel.ranges.length; i++) {
+      if (primary === false && i == doc.sel.primIndex) continue;
+      var range = doc.sel.ranges[i];
+      if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) continue;
+      var collapsed = range.empty();
+      if (collapsed || cm.options.showCursorWhenSelecting)
+        drawSelectionCursor(cm, range.head, curFragment);
+      if (!collapsed)
+        drawSelectionRange(cm, range, selFragment);
+    }
+    return result;
+  }
+
+  // Draws a cursor for the given range
+  function drawSelectionCursor(cm, head, output) {
+    var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
+
+    var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
+    cursor.style.left = pos.left + "px";
+    cursor.style.top = pos.top + "px";
+    cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
+
+    if (pos.other) {
+      // Secondary cursor, shown when on a 'jump' in bi-directional text
+      var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
+      otherCursor.style.display = "";
+      otherCursor.style.left = pos.other.left + "px";
+      otherCursor.style.top = pos.other.top + "px";
+      otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
+    }
+  }
+
+  // Draws the given range as a highlighted selection
+  function drawSelectionRange(cm, range, output) {
+    var display = cm.display, doc = cm.doc;
+    var fragment = document.createDocumentFragment();
+    var padding = paddingH(cm.display), leftSide = padding.left;
+    var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
+
+    function add(left, top, width, bottom) {
+      if (top < 0) top = 0;
+      top = Math.round(top);
+      bottom = Math.round(bottom);
+      fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
+                               "px; top: " + top + "px; width: " + (width == null ? rightSide - left : width) +
+                               "px; height: " + (bottom - top) + "px"));
+    }
+
+    function drawForLine(line, fromArg, toArg) {
+      var lineObj = getLine(doc, line);
+      var lineLen = lineObj.text.length;
+      var start, end;
+      function coords(ch, bias) {
+        return charCoords(cm, Pos(line, ch), "div", lineObj, bias);
+      }
+
+      iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
+        var leftPos = coords(from, "left"), rightPos, left, right;
+        if (from == to) {
+          rightPos = leftPos;
+          left = right = leftPos.left;
+        } else {
+          rightPos = coords(to - 1, "right");
+          if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; }
+          left = leftPos.left;
+          right = rightPos.right;
+        }
+        if (fromArg == null && from == 0) left = leftSide;
+        if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
+          add(left, leftPos.top, null, leftPos.bottom);
+          left = leftSide;
+          if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
+        }
+        if (toArg == null && to == lineLen) right = rightSide;
+        if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
+          start = leftPos;
+        if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
+          end = rightPos;
+        if (left < leftSide + 1) left = leftSide;
+        add(left, rightPos.top, right - left, rightPos.bottom);
+      });
+      return {start: start, end: end};
+    }
+
+    var sFrom = range.from(), sTo = range.to();
+    if (sFrom.line == sTo.line) {
+      drawForLine(sFrom.line, sFrom.ch, sTo.ch);
+    } else {
+      var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
+      var singleVLine = visualLine(fromLine) == visualLine(toLine);
+      var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
+      var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
+      if (singleVLine) {
+        if (leftEnd.top < rightStart.top - 2) {
+          add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
+          add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
+        } else {
+          add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
+        }
+      }
+      if (leftEnd.bottom < rightStart.top)
+        add(leftSide, leftEnd.bottom, null, rightStart.top);
+    }
+
+    output.appendChild(fragment);
+  }
+
+  // Cursor-blinking
+  function restartBlink(cm) {
+    if (!cm.state.focused) return;
+    var display = cm.display;
+    clearInterval(display.blinker);
+    var on = true;
+    display.cursorDiv.style.visibility = "";
+    if (cm.options.cursorBlinkRate > 0)
+      display.blinker = setInterval(function() {
+        display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
+      }, cm.options.cursorBlinkRate);
+    else if (cm.options.cursorBlinkRate < 0)
+      display.cursorDiv.style.visibility = "hidden";
+  }
+
+  // HIGHLIGHT WORKER
+
+  function startWorker(cm, time) {
+    if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo)
+      cm.state.highlight.set(time, bind(highlightWorker, cm));
+  }
+
+  function highlightWorker(cm) {
+    var doc = cm.doc;
+    if (doc.frontier < doc.first) doc.frontier = doc.first;
+    if (doc.frontier >= cm.display.viewTo) return;
+    var end = +new Date + cm.options.workTime;
+    var state = copyState(doc.mode, getStateBefore(cm, doc.frontier));
+    var changedLines = [];
+
+    doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function(line) {
+      if (doc.frontier >= cm.display.viewFrom) { // Visible
+        var oldStyles = line.styles, tooLong = line.text.length > cm.options.maxHighlightLength;
+        var highlighted = highlightLine(cm, line, tooLong ? copyState(doc.mode, state) : state, true);
+        line.styles = highlighted.styles;
+        var oldCls = line.styleClasses, newCls = highlighted.classes;
+        if (newCls) line.styleClasses = newCls;
+        else if (oldCls) line.styleClasses = null;
+        var ischange = !oldStyles || oldStyles.length != line.styles.length ||
+          oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
+        for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
+        if (ischange) changedLines.push(doc.frontier);
+        line.stateAfter = tooLong ? state : copyState(doc.mode, state);
+      } else {
+        if (line.text.length <= cm.options.maxHighlightLength)
+          processLine(cm, line.text, state);
+        line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null;
+      }
+      ++doc.frontier;
+      if (+new Date > end) {
+        startWorker(cm, cm.options.workDelay);
+        return true;
+      }
+    });
+    if (changedLines.length) runInOp(cm, function() {
+      for (var i = 0; i < changedLines.length; i++)
+        regLineChange(cm, changedLines[i], "text");
+    });
+  }
+
+  // Finds the line to start with when starting a parse. Tries to
+  // find a line with a stateAfter, so that it can start with a
+  // valid state. If that fails, it returns the line with the
+  // smallest indentation, which tends to need the least context to
+  // parse correctly.
+  function findStartLine(cm, n, precise) {
+    var minindent, minline, doc = cm.doc;
+    var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
+    for (var search = n; search > lim; --search) {
+      if (search <= doc.first) return doc.first;
+      var line = getLine(doc, search - 1);
+      if (line.stateAfter && (!precise || search <= doc.frontier)) return search;
+      var indented = countColumn(line.text, null, cm.options.tabSize);
+      if (minline == null || minindent > indented) {
+        minline = search - 1;
+        minindent = indented;
+      }
+    }
+    return minline;
+  }
+
+  function getStateBefore(cm, n, precise) {
+    var doc = cm.doc, display = cm.display;
+    if (!doc.mode.startState) return true;
+    var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter;
+    if (!state) state = startState(doc.mode);
+    else state = copyState(doc.mode, state);
+    doc.iter(pos, n, function(line) {
+      processLine(cm, line.text, state);
+      var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo;
+      line.stateAfter = save ? copyState(doc.mode, state) : null;
+      ++pos;
+    });
+    if (precise) doc.frontier = pos;
+    return state;
+  }
+
+  // POSITION MEASUREMENT
+
+  function paddingTop(display) {return display.lineSpace.offsetTop;}
+  function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;}
+  function paddingH(display) {
+    if (display.cachedPaddingH) return display.cachedPaddingH;
+    var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
+    var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
+    var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
+    if (!isNaN(data.left) && !isNaN(data.right)) display.cachedPaddingH = data;
+    return data;
+  }
+
+  function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth; }
+  function displayWidth(cm) {
+    return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth;
+  }
+  function displayHeight(cm) {
+    return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight;
+  }
+
+  // Ensure the lineView.wrapping.heights array is populated. This is
+  // an array of bottom offsets for the lines that make up a drawn
+  // line. When lineWrapping is on, there might be more than one
+  // height.
+  function ensureLineHeights(cm, lineView, rect) {
+    var wrapping = cm.options.lineWrapping;
+    var curWidth = wrapping && displayWidth(cm);
+    if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
+      var heights = lineView.measure.heights = [];
+      if (wrapping) {
+        lineView.measure.width = curWidth;
+        var rects = lineView.text.firstChild.getClientRects();
+        for (var i = 0; i < rects.length - 1; i++) {
+          var cur = rects[i], next = rects[i + 1];
+          if (Math.abs(cur.bottom - next.bottom) > 2)
+            heights.push((cur.bottom + next.top) / 2 - rect.top);
+        }
+      }
+      heights.push(rect.bottom - rect.top);
+    }
+  }
+
+  // Find a line map (mapping character offsets to text nodes) and a
+  // measurement cache for the given line number. (A line view might
+  // contain multiple lines when collapsed ranges are present.)
+  function mapFromLineView(lineView, line, lineN) {
+    if (lineView.line == line)
+      return {map: lineView.measure.map, cache: lineView.measure.cache};
+    for (var i = 0; i < lineView.rest.length; i++)
+      if (lineView.rest[i] == line)
+        return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]};
+    for (var i = 0; i < lineView.rest.length; i++)
+      if (lineNo(lineView.rest[i]) > lineN)
+        return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i], before: true};
+  }
+
+  // Render a line into the hidden node display.externalMeasured. Used
+  // when measurement is needed for a line that's not in the viewport.
+  function updateExternalMeasurement(cm, line) {
+    line = visualLine(line);
+    var lineN = lineNo(line);
+    var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
+    view.lineN = lineN;
+    var built = view.built = buildLineContent(cm, view);
+    view.text = built.pre;
+    removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
+    return view;
+  }
+
+  // Get a {top, bottom, left, right} box (in line-local coordinates)
+  // for a given character.
+  function measureChar(cm, line, ch, bias) {
+    return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias);
+  }
+
+  // Find a line view that corresponds to the given line number.
+  function findViewForLine(cm, lineN) {
+    if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
+      return cm.display.view[findViewIndex(cm, lineN)];
+    var ext = cm.display.externalMeasured;
+    if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
+      return ext;
+  }
+
+  // Measurement can be split in two steps, the set-up work that
+  // applies to the whole line, and the measurement of the actual
+  // character. Functions like coordsChar, that need to do a lot of
+  // measurements in a row, can thus ensure that the set-up work is
+  // only done once.
+  function prepareMeasureForLine(cm, line) {
+    var lineN = lineNo(line);
+    var view = findViewForLine(cm, lineN);
+    if (view && !view.text) {
+      view = null;
+    } else if (view && view.changes) {
+      updateLineForChanges(cm, view, lineN, getDimensions(cm));
+      cm.curOp.forceUpdate = true;
+    }
+    if (!view)
+      view = updateExternalMeasurement(cm, line);
+
+    var info = mapFromLineView(view, line, lineN);
+    return {
+      line: line, view: view, rect: null,
+      map: info.map, cache: info.cache, before: info.before,
+      hasHeights: false
+    };
+  }
+
+  // Given a prepared measurement object, measures the position of an
+  // actual character (or fetches it from the cache).
+  function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
+    if (prepared.before) ch = -1;
+    var key = ch + (bias || ""), found;
+    if (prepared.cache.hasOwnProperty(key)) {
+      found = prepared.cache[key];
+    } else {
+      if (!prepared.rect)
+        prepared.rect = prepared.view.text.getBoundingClientRect();
+      if (!prepared.hasHeights) {
+        ensureLineHeights(cm, prepared.view, prepared.rect);
+        prepared.hasHeights = true;
+      }
+      found = measureCharInner(cm, prepared, ch, bias);
+      if (!found.bogus) prepared.cache[key] = found;
+    }
+    return {left: found.left, right: found.right,
+            top: varHeight ? found.rtop : found.top,
+            bottom: varHeight ? found.rbottom : found.bottom};
+  }
+
+  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
+
+  function nodeAndOffsetInLineMap(map, ch, bias) {
+    var node, start, end, collapse;
+    // First, search the line map for the text node corresponding to,
+    // or closest to, the target character.
+    for (var i = 0; i < map.length; i += 3) {
+      var mStart = map[i], mEnd = map[i + 1];
+      if (ch < mStart) {
+        start = 0; end = 1;
+        collapse = "left";
+      } else if (ch < mEnd) {
+        start = ch - mStart;
+        end = start + 1;
+      } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
+        end = mEnd - mStart;
+        start = end - 1;
+        if (ch >= mEnd) collapse = "right";
+      }
+      if (start != null) {
+        node = map[i + 2];
+        if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
+          collapse = bias;
+        if (bias == "left" && start == 0)
+          while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
+            node = map[(i -= 3) + 2];
+            collapse = "left";
+          }
+        if (bias == "right" && start == mEnd - mStart)
+          while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
+            node = map[(i += 3) + 2];
+            collapse = "right";
+          }
+        break;
+      }
+    }
+    return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd};
+  }
+
+  function measureCharInner(cm, prepared, ch, bias) {
+    var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
+    var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
+
+    var rect;
+    if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+      for (var i = 0; i < 4; i++) { // Retry a maximum of 4 times when nonsense rectangles are returned
+        while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) --start;
+        while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) ++end;
+        if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart) {
+          rect = node.parentNode.getBoundingClientRect();
+        } else if (ie && cm.options.lineWrapping) {
+          var rects = range(node, start, end).getClientRects();
+          if (rects.length)
+            rect = rects[bias == "right" ? rects.length - 1 : 0];
+          else
+            rect = nullRect;
+        } else {
+          rect = range(node, start, end).getBoundingClientRect() || nullRect;
+        }
+        if (rect.left || rect.right || start == 0) break;
+        end = start;
+        start = start - 1;
+        collapse = "right";
+      }
+      if (ie && ie_version < 11) rect = maybeUpdateRectForZooming(cm.display.measure, rect);
+    } else { // If it is a widget, simply get the box for the whole widget.
+      if (start > 0) collapse = bias = "right";
+      var rects;
+      if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
+        rect = rects[bias == "right" ? rects.length - 1 : 0];
+      else
+        rect = node.getBoundingClientRect();
+    }
+    if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
+      var rSpan = node.parentNode.getClientRects()[0];
+      if (rSpan)
+        rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom};
+      else
+        rect = nullRect;
+    }
+
+    var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
+    var mid = (rtop + rbot) / 2;
+    var heights = prepared.view.measure.heights;
+    for (var i = 0; i < heights.length - 1; i++)
+      if (mid < heights[i]) break;
+    var top = i ? heights[i - 1] : 0, bot = heights[i];
+    var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
+                  right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
+                  top: top, bottom: bot};
+    if (!rect.left && !rect.right) result.bogus = true;
+    if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
+
+    return result;
+  }
+
+  // Work around problem with bounding client rects on ranges being
+  // returned incorrectly when zoomed on IE10 and below.
+  function maybeUpdateRectForZooming(measure, rect) {
+    if (!window.screen || screen.logicalXDPI == null ||
+        screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
+      return rect;
+    var scaleX = screen.logicalXDPI / screen.deviceXDPI;
+    var scaleY = screen.logicalYDPI / screen.deviceYDPI;
+    return {left: rect.left * scaleX, right: rect.right * scaleX,
+            top: rect.top * scaleY, bottom: rect.bottom * scaleY};
+  }
+
+  function clearLineMeasurementCacheFor(lineView) {
+    if (lineView.measure) {
+      lineView.measure.cache = {};
+      lineView.measure.heights = null;
+      if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
+        lineView.measure.caches[i] = {};
+    }
+  }
+
+  function clearLineMeasurementCache(cm) {
+    cm.display.externalMeasure = null;
+    removeChildren(cm.display.lineMeasure);
+    for (var i = 0; i < cm.display.view.length; i++)
+      clearLineMeasurementCacheFor(cm.display.view[i]);
+  }
+
+  function clearCaches(cm) {
+    clearLineMeasurementCache(cm);
+    cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
+    if (!cm.options.lineWrapping) cm.display.maxLineChanged = true;
+    cm.display.lineNumChars = null;
+  }
+
+  function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; }
+  function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; }
+
+  // Converts a {top, bottom, left, right} box from line-local
+  // coordinates into another coordinate system. Context may be one of
+  // "line", "div" (display.lineDiv), "local"/null (editor), "window",
+  // or "page".
+  function intoCoordSystem(cm, lineObj, rect, context) {
+    if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
+      var size = widgetHeight(lineObj.widgets[i]);
+      rect.top += size; rect.bottom += size;
+    }
+    if (context == "line") return rect;
+    if (!context) context = "local";
+    var yOff = heightAtLine(lineObj);
+    if (context == "local") yOff += paddingTop(cm.display);
+    else yOff -= cm.display.viewOffset;
+    if (context == "page" || context == "window") {
+      var lOff = cm.display.lineSpace.getBoundingClientRect();
+      yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
+      var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
+      rect.left += xOff; rect.right += xOff;
+    }
+    rect.top += yOff; rect.bottom += yOff;
+    return rect;
+  }
+
+  // Coverts a box from "div" coords to another coordinate system.
+  // Context may be "window", "page", "div", or "local"/null.
+  function fromCoordSystem(cm, coords, context) {
+    if (context == "div") return coords;
+    var left = coords.left, top = coords.top;
+    // First move into "page" coordinate system
+    if (context == "page") {
+      left -= pageScrollX();
+      top -= pageScrollY();
+    } else if (context == "local" || !context) {
+      var localBox = cm.display.sizer.getBoundingClientRect();
+      left += localBox.left;
+      top += localBox.top;
+    }
+
+    var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
+    return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};
+  }
+
+  function charCoords(cm, pos, context, lineObj, bias) {
+    if (!lineObj) lineObj = getLine(cm.doc, pos.line);
+    return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context);
+  }
+
+  // Returns a box for a given cursor position, which may have an
+  // 'other' property containing the position of the secondary cursor
+  // on a bidi boundary.
+  function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
+    lineObj = lineObj || getLine(cm.doc, pos.line);
+    if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj);
+    function get(ch, right) {
+      var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
+      if (right) m.left = m.right; else m.right = m.left;
+      return intoCoordSystem(cm, lineObj, m, context);
+    }
+    function getBidi(ch, partPos) {
+      var part = order[partPos], right = part.level % 2;
+      if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) {
+        part = order[--partPos];
+        ch = bidiRight(part) - (part.level % 2 ? 0 : 1);
+        right = true;
+      } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) {
+        part = order[++partPos];
+        ch = bidiLeft(part) - part.level % 2;
+        right = false;
+      }
+      if (right && ch == part.to && ch > part.from) return get(ch - 1);
+      return get(ch, right);
+    }
+    var order = getOrder(lineObj), ch = pos.ch;
+    if (!order) return get(ch);
+    var partPos = getBidiPartAt(order, ch);
+    var val = getBidi(ch, partPos);
+    if (bidiOther != null) val.other = getBidi(ch, bidiOther);
+    return val;
+  }
+
+  // Used to cheaply estimate the coordinates for a position. Used for
+  // intermediate scroll updates.
+  function estimateCoords(cm, pos) {
+    var left = 0, pos = clipPos(cm.doc, pos);
+    if (!cm.options.lineWrapping) left = charWidth(cm.display) * pos.ch;
+    var lineObj = getLine(cm.doc, pos.line);
+    var top = heightAtLine(lineObj) + paddingTop(cm.display);
+    return {left: left, right: left, top: top, bottom: top + lineObj.height};
+  }
+
+  // Positions returned by coordsChar contain some extra information.
+  // xRel is the relative x position of the input coordinates compared
+  // to the found position (so xRel > 0 means the coordinates are to
+  // the right of the character position, for example). When outside
+  // is true, that means the coordinates lie outside the line's
+  // vertical range.
+  function PosWithInfo(line, ch, outside, xRel) {
+    var pos = Pos(line, ch);
+    pos.xRel = xRel;
+    if (outside) pos.outside = true;
+    return pos;
+  }
+
+  // Compute the character position closest to the given coordinates.
+  // Input must be lineSpace-local ("div" coordinate system).
+  function coordsChar(cm, x, y) {
+    var doc = cm.doc;
+    y += cm.display.viewOffset;
+    if (y < 0) return PosWithInfo(doc.first, 0, true, -1);
+    var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
+    if (lineN > last)
+      return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1);
+    if (x < 0) x = 0;
+
+    var lineObj = getLine(doc, lineN);
+    for (;;) {
+      var found = coordsCharInner(cm, lineObj, lineN, x, y);
+      var merged = collapsedSpanAtEnd(lineObj);
+      var mergedPos = merged && merged.find(0, true);
+      if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
+        lineN = lineNo(lineObj = mergedPos.to.line);
+      else
+        return found;
+    }
+  }
+
+  function coordsCharInner(cm, lineObj, lineNo, x, y) {
+    var innerOff = y - heightAtLine(lineObj);
+    var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth;
+    var preparedMeasure = prepareMeasureForLine(cm, lineObj);
+
+    function getX(ch) {
+      var sp = cursorCoords(cm, Pos(lineNo, ch), "line", lineObj, preparedMeasure);
+      wrongLine = true;
+      if (innerOff > sp.bottom) return sp.left - adjust;
+      else if (innerOff < sp.top) return sp.left + adjust;
+      else wrongLine = false;
+      return sp.left;
+    }
+
+    var bidi = getOrder(lineObj), dist = lineObj.text.length;
+    var from = lineLeft(lineObj), to = lineRight(lineObj);
+    var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine;
+
+    if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1);
+    // Do a binary search between these bounds.
+    for (;;) {
+      if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
+        var ch = x < fromX || x - fromX <= toX - x ? from : to;
+        var xDiff = x - (ch == from ? fromX : toX);
+        while (isExtendingChar(lineObj.text.charAt(ch))) ++ch;
+        var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside,
+                              xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0);
+        return pos;
+      }
+      var step = Math.ceil(dist / 2), middle = from + step;
+      if (bidi) {
+        middle = from;
+        for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
+      }
+      var middleX = getX(middle);
+      if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;}
+      else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;}
+    }
+  }
+
+  var measureText;
+  // Compute the default text height.
+  function textHeight(display) {
+    if (display.cachedTextHeight != null) return display.cachedTextHeight;
+    if (measureText == null) {
+      measureText = elt("pre");
+      // Measure a bunch of lines, for browsers that compute
+      // fractional heights.
+      for (var i = 0; i < 49; ++i) {
+        measureText.appendChild(document.createTextNode("x"));
+        measureText.appendChild(elt("br"));
+      }
+      measureText.appendChild(document.createTextNode("x"));
+    }
+    removeChildrenAndAdd(display.measure, measureText);
+    var height = measureText.offsetHeight / 50;
+    if (height > 3) display.cachedTextHeight = height;
+    removeChildren(display.measure);
+    return height || 1;
+  }
+
+  // Compute the default character width.
+  function charWidth(display) {
+    if (display.cachedCharWidth != null) return display.cachedCharWidth;
+    var anchor = elt("span", "xxxxxxxxxx");
+    var pre = elt("pre", [anchor]);
+    removeChildrenAndAdd(display.measure, pre);
+    var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
+    if (width > 2) display.cachedCharWidth = width;
+    return width || 10;
+  }
+
+  // OPERATIONS
+
+  // Operations are used to wrap a series of changes to the editor
+  // state in such a way that each change won't have to update the
+  // cursor and display (which would be awkward, slow, and
+  // error-prone). Instead, display updates are batched and then all
+  // combined and executed at once.
+
+  var operationGroup = null;
+
+  var nextOpId = 0;
+  // Start a new operation.
+  function startOperation(cm) {
+    cm.curOp = {
+      cm: cm,
+      viewChanged: false,      // Flag that indicates that lines might need to be redrawn
+      startHeight: cm.doc.height, // Used to detect need to update scrollbar
+      forceUpdate: false,      // Used to force a redraw
+      updateInput: null,       // Whether to reset the input textarea
+      typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
+      changeObjs: null,        // Accumulated changes, for firing change events
+      cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
+      cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
+      selectionChanged: false, // Whether the selection needs to be redrawn
+      updateMaxLine: false,    // Set when the widest line needs to be determined anew
+      scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
+      scrollToPos: null,       // Used to scroll to a specific position
+      focus: false,
+      id: ++nextOpId           // Unique ID
+    };
+    if (operationGroup) {
+      operationGroup.ops.push(cm.curOp);
+    } else {
+      cm.curOp.ownsGroup = operationGroup = {
+        ops: [cm.curOp],
+        delayedCallbacks: []
+      };
+    }
+  }
+
+  function fireCallbacksForOps(group) {
+    // Calls delayed callbacks and cursorActivity handlers until no
+    // new ones appear
+    var callbacks = group.delayedCallbacks, i = 0;
+    do {
+      for (; i < callbacks.length; i++)
+        callbacks[i].call(null);
+      for (var j = 0; j < group.ops.length; j++) {
+        var op = group.ops[j];
+        if (op.cursorActivityHandlers)
+          while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
+            op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm);
+      }
+    } while (i < callbacks.length);
+  }
+
+  // Finish an operation, updating the display and signalling delayed events
+  function endOperation(cm) {
+    var op = cm.curOp, group = op.ownsGroup;
+    if (!group) return;
+
+    try { fireCallbacksForOps(group); }
+    finally {
+      operationGroup = null;
+      for (var i = 0; i < group.ops.length; i++)
+        group.ops[i].cm.curOp = null;
+      endOperations(group);
+    }
+  }
+
+  // The DOM updates done when an operation finishes are batched so
+  // that the minimum number of relayouts are required.
+  function endOperations(group) {
+    var ops = group.ops;
+    for (var i = 0; i < ops.length; i++) // Read DOM
+      endOperation_R1(ops[i]);
+    for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
+      endOperation_W1(ops[i]);
+    for (var i = 0; i < ops.length; i++) // Read DOM
+      endOperation_R2(ops[i]);
+    for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
+      endOperation_W2(ops[i]);
+    for (var i = 0; i < ops.length; i++) // Read DOM
+      endOperation_finish(ops[i]);
+  }
+
+  function endOperation_R1(op) {
+    var cm = op.cm, display = cm.display;
+    maybeClipScrollbars(cm);
+    if (op.updateMaxLine) findMaxLine(cm);
+
+    op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
+      op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
+                         op.scrollToPos.to.line >= display.viewTo) ||
+      display.maxLineChanged && cm.options.lineWrapping;
+    op.update = op.mustUpdate &&
+      new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
+  }
+
+  function endOperation_W1(op) {
+    op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
+  }
+
+  function endOperation_R2(op) {
+    var cm = op.cm, display = cm.display;
+    if (op.updatedDisplay) updateHeightsInViewport(cm);
+
+    op.barMeasure = measureForScrollbars(cm);
+
+    // If the max line changed since it was last measured, measure it,
+    // and ensure the document's width matches it.
+    // updateDisplay_W2 will use these properties to do the actual resizing
+    if (display.maxLineChanged && !cm.options.lineWrapping) {
+      op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
+      cm.display.sizerWidth = op.adjustWidthTo;
+      op.barMeasure.scrollWidth =
+        Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
+      op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
+    }
+
+    if (op.updatedDisplay || op.selectionChanged)
+      op.preparedSelection = display.input.prepareSelection(op.focus);
+  }
+
+  function endOperation_W2(op) {
+    var cm = op.cm;
+
+    if (op.adjustWidthTo != null) {
+      cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
+      if (op.maxScrollLeft < cm.doc.scrollLeft)
+        setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true);
+      cm.display.maxLineChanged = false;
+    }
+
+    var takeFocus = op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus())
+    if (op.preparedSelection)
+      cm.display.input.showSelection(op.preparedSelection, takeFocus);
+    if (op.updatedDisplay || op.startHeight != cm.doc.height)
+      updateScrollbars(cm, op.barMeasure);
+    if (op.updatedDisplay)
+      setDocumentHeight(cm, op.barMeasure);
+
+    if (op.selectionChanged) restartBlink(cm);
+
+    if (cm.state.focused && op.updateInput)
+      cm.display.input.reset(op.typing);
+    if (takeFocus) ensureFocus(op.cm);
+  }
+
+  function endOperation_finish(op) {
+    var cm = op.cm, display = cm.display, doc = cm.doc;
+
+    if (op.updatedDisplay) postUpdateDisplay(cm, op.update);
+
+    // Abort mouse wheel delta measurement, when scrolling explicitly
+    if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
+      display.wheelStartX = display.wheelStartY = null;
+
+    // Propagate the scroll position to the actual DOM scroller
+    if (op.scrollTop != null && (display.scroller.scrollTop != op.scrollTop || op.forceScroll)) {
+      doc.scrollTop = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop));
+      display.scrollbars.setScrollTop(doc.scrollTop);
+      display.scroller.scrollTop = doc.scrollTop;
+    }
+    if (op.scrollLeft != null && (display.scroller.scrollLeft != op.scrollLeft || op.forceScroll)) {
+      doc.scrollLeft = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, op.scrollLeft));
+      display.scrollbars.setScrollLeft(doc.scrollLeft);
+      display.scroller.scrollLeft = doc.scrollLeft;
+      alignHorizontally(cm);
+    }
+    // If we need to scroll a specific position into view, do so.
+    if (op.scrollToPos) {
+      var coords = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
+                                     clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
+      if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coords);
+    }
+
+    // Fire events for markers that are hidden/unidden by editing or
+    // undoing
+    var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
+    if (hidden) for (var i = 0; i < hidden.length; ++i)
+      if (!hidden[i].lines.length) signal(hidden[i], "hide");
+    if (unhidden) for (var i = 0; i < unhidden.length; ++i)
+      if (unhidden[i].lines.length) signal(unhidden[i], "unhide");
+
+    if (display.wrapper.offsetHeight)
+      doc.scrollTop = cm.display.scroller.scrollTop;
+
+    // Fire change events, and delayed event handlers
+    if (op.changeObjs)
+      signal(cm, "changes", cm, op.changeObjs);
+    if (op.update)
+      op.update.finish();
+  }
+
+  // Run the given function in an operation
+  function runInOp(cm, f) {
+    if (cm.curOp) return f();
+    startOperation(cm);
+    try { return f(); }
+    finally { endOperation(cm); }
+  }
+  // Wraps a function in an operation. Returns the wrapped function.
+  function operation(cm, f) {
+    return function() {
+      if (cm.curOp) return f.apply(cm, arguments);
+      startOperation(cm);
+      try { return f.apply(cm, arguments); }
+      finally { endOperation(cm); }
+    };
+  }
+  // Used to add methods to editor and doc instances, wrapping them in
+  // operations.
+  function methodOp(f) {
+    return function() {
+      if (this.curOp) return f.apply(this, arguments);
+      startOperation(this);
+      try { return f.apply(this, arguments); }
+      finally { endOperation(this); }
+    };
+  }
+  function docMethodOp(f) {
+    return function() {
+      var cm = this.cm;
+      if (!cm || cm.curOp) return f.apply(this, arguments);
+      startOperation(cm);
+      try { return f.apply(this, arguments); }
+      finally { endOperation(cm); }
+    };
+  }
+
+  // VIEW TRACKING
+
+  // These objects are used to represent the visible (currently drawn)
+  // part of the document. A LineView may correspond to multiple
+  // logical lines, if those are connected by collapsed ranges.
+  function LineView(doc, line, lineN) {
+    // The starting line
+    this.line = line;
+    // Continuing lines, if any
+    this.rest = visualLineContinued(line);
+    // Number of logical lines in this visual line
+    this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
+    this.node = this.text = null;
+    this.hidden = lineIsHidden(doc, line);
+  }
+
+  // Create a range of LineView objects for the given lines.
+  function buildViewArray(cm, from, to) {
+    var array = [], nextPos;
+    for (var pos = from; pos < to; pos = nextPos) {
+      var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
+      nextPos = pos + view.size;
+      array.push(view);
+    }
+    return array;
+  }
+
+  // Updates the display.view data structure for a given change to the
+  // document. From and to are in pre-change coordinates. Lendiff is
+  // the amount of lines added or subtracted by the change. This is
+  // used for changes that span multiple lines, or change the way
+  // lines are divided into visual lines. regLineChange (below)
+  // registers single-line changes.
+  function regChange(cm, from, to, lendiff) {
+    if (from == null) from = cm.doc.first;
+    if (to == null) to = cm.doc.first + cm.doc.size;
+    if (!lendiff) lendiff = 0;
+
+    var display = cm.display;
+    if (lendiff && to < display.viewTo &&
+        (display.updateLineNumbers == null || display.updateLineNumbers > from))
+      display.updateLineNumbers = from;
+
+    cm.curOp.viewChanged = true;
+
+    if (from >= display.viewTo) { // Change after
+      if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
+        resetView(cm);
+    } else if (to <= display.viewFrom) { // Change before
+      if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
+        resetView(cm);
+      } else {
+        display.viewFrom += lendiff;
+        display.viewTo += lendiff;
+      }
+    } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
+      resetView(cm);
+    } else if (from <= display.viewFrom) { // Top overlap
+      var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
+      if (cut) {
+        display.view = display.view.slice(cut.index);
+        display.viewFrom = cut.lineN;
+        display.viewTo += lendiff;
+      } else {
+        resetView(cm);
+      }
+    } else if (to >= display.viewTo) { // Bottom overlap
+      var cut = viewCuttingPoint(cm, from, from, -1);
+      if (cut) {
+        display.view = display.view.slice(0, cut.index);
+        display.viewTo = cut.lineN;
+      } else {
+        resetView(cm);
+      }
+    } else { // Gap in the middle
+      var cutTop = viewCuttingPoint(cm, from, from, -1);
+      var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
+      if (cutTop && cutBot) {
+        display.view = display.view.slice(0, cutTop.index)
+          .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
+          .concat(display.view.slice(cutBot.index));
+        display.viewTo += lendiff;
+      } else {
+        resetView(cm);
+      }
+    }
+
+    var ext = display.externalMeasured;
+    if (ext) {
+      if (to < ext.lineN)
+        ext.lineN += lendiff;
+      else if (from < ext.lineN + ext.size)
+        display.externalMeasured = null;
+    }
+  }
+
+  // Register a change to a single line. Type must be one of "text",
+  // "gutter", "class", "widget"
+  function regLineChange(cm, line, type) {
+    cm.curOp.viewChanged = true;
+    var display = cm.display, ext = cm.display.externalMeasured;
+    if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
+      display.externalMeasured = null;
+
+    if (line < display.viewFrom || line >= display.viewTo) return;
+    var lineView = display.view[findViewIndex(cm, line)];
+    if (lineView.node == null) return;
+    var arr = lineView.changes || (lineView.changes = []);
+    if (indexOf(arr, type) == -1) arr.push(type);
+  }
+
+  // Clear the view.
+  function resetView(cm) {
+    cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
+    cm.display.view = [];
+    cm.display.viewOffset = 0;
+  }
+
+  // Find the view element corresponding to a given line. Return null
+  // when the line isn't visible.
+  function findViewIndex(cm, n) {
+    if (n >= cm.display.viewTo) return null;
+    n -= cm.display.viewFrom;
+    if (n < 0) return null;
+    var view = cm.display.view;
+    for (var i = 0; i < view.length; i++) {
+      n -= view[i].size;
+      if (n < 0) return i;
+    }
+  }
+
+  function viewCuttingPoint(cm, oldN, newN, dir) {
+    var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
+    if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
+      return {index: index, lineN: newN};
+    for (var i = 0, n = cm.display.viewFrom; i < index; i++)
+      n += view[i].size;
+    if (n != oldN) {
+      if (dir > 0) {
+        if (index == view.length - 1) return null;
+        diff = (n + view[index].size) - oldN;
+        index++;
+      } else {
+        diff = n - oldN;
+      }
+      oldN += diff; newN += diff;
+    }
+    while (visualLineNo(cm.doc, newN) != newN) {
+      if (index == (dir < 0 ? 0 : view.length - 1)) return null;
+      newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
+      index += dir;
+    }
+    return {index: index, lineN: newN};
+  }
+
+  // Force the view to cover a given range, adding empty view element
+  // or clipping off existing ones as needed.
+  function adjustView(cm, from, to) {
+    var display = cm.display, view = display.view;
+    if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
+      display.view = buildViewArray(cm, from, to);
+      display.viewFrom = from;
+    } else {
+      if (display.viewFrom > from)
+        display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view);
+      else if (display.viewFrom < from)
+        display.view = display.view.slice(findViewIndex(cm, from));
+      display.viewFrom = from;
+      if (display.viewTo < to)
+        display.view = display.view.concat(buildViewArray(cm, display.viewTo, to));
+      else if (display.viewTo > to)
+        display.view = display.view.slice(0, findViewIndex(cm, to));
+    }
+    display.viewTo = to;
+  }
+
+  // Count the number of lines in the view whose DOM representation is
+  // out of date (or nonexistent).
+  function countDirtyView(cm) {
+    var view = cm.display.view, dirty = 0;
+    for (var i = 0; i < view.length; i++) {
+      var lineView = view[i];
+      if (!lineView.hidden && (!lineView.node || lineView.changes)) ++dirty;
+    }
+    return dirty;
+  }
+
+  // EVENT HANDLERS
+
+  // Attach the necessary event handlers when initializing the editor
+  function registerEventHandlers(cm) {
+    var d = cm.display;
+    on(d.scroller, "mousedown", operation(cm, onMouseDown));
+    // Older IE's will not fire a second mousedown for a double click
+    if (ie && ie_version < 11)
+      on(d.scroller, "dblclick", operation(cm, function(e) {
+        if (signalDOMEvent(cm, e)) return;
+        var pos = posFromMouse(cm, e);
+        if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return;
+        e_preventDefault(e);
+        var word = cm.findWordAt(pos);
+        extendSelection(cm.doc, word.anchor, word.head);
+      }));
+    else
+      on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); });
+    // Some browsers fire contextmenu *after* opening the menu, at
+    // which point we can't mess with it anymore. Context menu is
+    // handled in onMouseDown for these browsers.
+    if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});
+
+    // Used to suppress mouse event handling when a touch happens
+    var touchFinished, prevTouch = {end: 0};
+    function finishTouch() {
+      if (d.activeTouch) {
+        touchFinished = setTimeout(function() {d.activeTouch = null;}, 1000);
+        prevTouch = d.activeTouch;
+        prevTouch.end = +new Date;
+      }
+    };
+    function isMouseLikeTouchEvent(e) {
+      if (e.touches.length != 1) return false;
+      var touch = e.touches[0];
+      return touch.radiusX <= 1 && touch.radiusY <= 1;
+    }
+    function farAway(touch, other) {
+      if (other.left == null) return true;
+      var dx = other.left - touch.left, dy = other.top - touch.top;
+      return dx * dx + dy * dy > 20 * 20;
+    }
+    on(d.scroller, "touchstart", function(e) {
+      if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) {
+        clearTimeout(touchFinished);
+        var now = +new Date;
+        d.activeTouch = {start: now, moved: false,
+                         prev: now - prevTouch.end <= 300 ? prevTouch : null};
+        if (e.touches.length == 1) {
+          d.activeTouch.left = e.touches[0].pageX;
+          d.activeTouch.top = e.touches[0].pageY;
+        }
+      }
+    });
+    on(d.scroller, "touchmove", function() {
+      if (d.activeTouch) d.activeTouch.moved = true;
+    });
+    on(d.scroller, "touchend", function(e) {
+      var touch = d.activeTouch;
+      if (touch && !eventInWidget(d, e) && touch.left != null &&
+          !touch.moved && new Date - touch.start < 300) {
+        var pos = cm.coordsChar(d.activeTouch, "page"), range;
+        if (!touch.prev || farAway(touch, touch.prev)) // Single tap
+          range = new Range(pos, pos);
+        else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
+          range = cm.findWordAt(pos);
+        else // Triple tap
+          range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0)));
+        cm.setSelection(range.anchor, range.head);
+        cm.focus();
+        e_preventDefault(e);
+      }
+      finishTouch();
+    });
+    on(d.scroller, "touchcancel", finishTouch);
+
+    // Sync scrolling between fake scrollbars and real scrollable
+    // area, ensure viewport is updated when scrolling.
+    on(d.scroller, "scroll", function() {
+      if (d.scroller.clientHeight) {
+        setScrollTop(cm, d.scroller.scrollTop);
+        setScrollLeft(cm, d.scroller.scrollLeft, true);
+        signal(cm, "scroll", cm);
+      }
+    });
+
+    // Listen to wheel events in order to try and update the viewport on time.
+    on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
+    on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
+
+    // Prevent wrapper from ever scrolling
+    on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
+
+    d.dragFunctions = {
+      enter: function(e) {if (!signalDOMEvent(cm, e)) e_stop(e);},
+      over: function(e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
+      start: function(e){onDragStart(cm, e);},
+      drop: operation(cm, onDrop),
+      leave: function(e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
+    };
+
+    var inp = d.input.getField();
+    on(inp, "keyup", function(e) { onKeyUp.call(cm, e); });
+    on(inp, "keydown", operation(cm, onKeyDown));
+    on(inp, "keypress", operation(cm, onKeyPress));
+    on(inp, "focus", bind(onFocus, cm));
+    on(inp, "blur", bind(onBlur, cm));
+  }
+
+  function dragDropChanged(cm, value, old) {
+    var wasOn = old && old != CodeMirror.Init;
+    if (!value != !wasOn) {
+      var funcs = cm.display.dragFunctions;
+      var toggle = value ? on : off;
+      toggle(cm.display.scroller, "dragstart", funcs.start);
+      toggle(cm.display.scroller, "dragenter", funcs.enter);
+      toggle(cm.display.scroller, "dragover", funcs.over);
+      toggle(cm.display.scroller, "dragleave", funcs.leave);
+      toggle(cm.display.scroller, "drop", funcs.drop);
+    }
+  }
+
+  // Called when the window resizes
+  function onResize(cm) {
+    var d = cm.display;
+    if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
+      return;
+    // Might be a text scaling operation, clear size caches.
+    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+    d.scrollbarsClipped = false;
+    cm.setSize();
+  }
+
+  // MOUSE EVENTS
+
+  // Return true when the given mouse event happened in a widget
+  function eventInWidget(display, e) {
+    for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
+      if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
+          (n.parentNode == display.sizer && n != display.mover))
+        return true;
+    }
+  }
+
+  // Given a mouse event, find the corresponding position. If liberal
+  // is false, it checks whether a gutter or scrollbar was clicked,
+  // and returns null if it was. forRect is used by rectangular
+  // selections, and tries to estimate a character position even for
+  // coordinates beyond the right of the text.
+  function posFromMouse(cm, e, liberal, forRect) {
+    var display = cm.display;
+    if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") return null;
+
+    var x, y, space = display.lineSpace.getBoundingClientRect();
+    // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+    try { x = e.clientX - space.left; y = e.clientY - space.top; }
+    catch (e) { return null; }
+    var coords = coordsChar(cm, x, y), line;
+    if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
+      var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
+      coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
+    }
+    return coords;
+  }
+
+  // A mouse down can be a single click, double click, triple click,
+  // start of selection drag, start of text drag, new cursor
+  // (ctrl-click), rectangle drag (alt-drag), or xwin
+  // middle-click-paste. Or it might be a click on something we should
+  // not interfere with, such as a scrollbar or widget.
+  function onMouseDown(e) {
+    var cm = this, display = cm.display;
+    if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) return;
+    display.shift = e.shiftKey;
+
+    if (eventInWidget(display, e)) {
+      if (!webkit) {
+        // Briefly turn off draggability, to allow widgets to do
+        // normal dragging things.
+        display.scroller.draggable = false;
+        setTimeout(function(){display.scroller.draggable = true;}, 100);
+      }
+      return;
+    }
+    if (clickInGutter(cm, e)) return;
+    var start = posFromMouse(cm, e);
+    window.focus();
+
+    switch (e_button(e)) {
+    case 1:
+      // #3261: make sure, that we're not starting a second selection
+      if (cm.state.selectingText)
+        cm.state.selectingText(e);
+      else if (start)
+        leftButtonDown(cm, e, start);
+      else if (e_target(e) == display.scroller)
+        e_preventDefault(e);
+      break;
+    case 2:
+      if (webkit) cm.state.lastMiddleDown = +new Date;
+      if (start) extendSelection(cm.doc, start);
+      setTimeout(function() {display.input.focus();}, 20);
+      e_preventDefault(e);
+      break;
+    case 3:
+      if (captureRightClick) onContextMenu(cm, e);
+      else delayBlurEvent(cm);
+      break;
+    }
+  }
+
+  var lastClick, lastDoubleClick;
+  function leftButtonDown(cm, e, start) {
+    if (ie) setTimeout(bind(ensureFocus, cm), 0);
+    else cm.curOp.focus = activeElt();
+
+    var now = +new Date, type;
+    if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleClick.pos, start) == 0) {
+      type = "triple";
+    } else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, start) == 0) {
+      type = "double";
+      lastDoubleClick = {time: now, pos: start};
+    } else {
+      type = "single";
+      lastClick = {time: now, pos: start};
+    }
+
+    var sel = cm.doc.sel, modifier = mac ? e.metaKey : e.ctrlKey, contained;
+    if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
+        type == "single" && (contained = sel.contains(start)) > -1 &&
+        (cmp((contained = sel.ranges[contained]).from(), start) < 0 || start.xRel > 0) &&
+        (cmp(contained.to(), start) > 0 || start.xRel < 0))
+      leftButtonStartDrag(cm, e, start, modifier);
+    else
+      leftButtonSelect(cm, e, start, type, modifier);
+  }
+
+  // Start a text drag. When it ends, see if any dragging actually
+  // happen, and treat as a click if it didn't.
+  function leftButtonStartDrag(cm, e, start, modifier) {
+    var display = cm.display, startTime = +new Date;
+    var dragEnd = operation(cm, function(e2) {
+      if (webkit) display.scroller.draggable = false;
+      cm.state.draggingText = false;
+      off(document, "mouseup", dragEnd);
+      off(display.scroller, "drop", dragEnd);
+      if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
+        e_preventDefault(e2);
+        if (!modifier && +new Date - 200 < startTime)
+          extendSelection(cm.doc, start);
+        // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
+        if (webkit || ie && ie_version == 9)
+          setTimeout(function() {document.body.focus(); display.input.focus();}, 20);
+        else
+          display.input.focus();
+      }
+    });
+    // Let the drag handler handle this.
+    if (webkit) display.scroller.draggable = true;
+    cm.state.draggingText = dragEnd;
+    // IE's approach to draggable
+    if (display.scroller.dragDrop) display.scroller.dragDrop();
+    on(document, "mouseup", dragEnd);
+    on(display.scroller, "drop", dragEnd);
+  }
+
+  // Normal selection, as opposed to text dragging.
+  function leftButtonSelect(cm, e, start, type, addNew) {
+    var display = cm.display, doc = cm.doc;
+    e_preventDefault(e);
+
+    var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
+    if (addNew && !e.shiftKey) {
+      ourIndex = doc.sel.contains(start);
+      if (ourIndex > -1)
+        ourRange = ranges[ourIndex];
+      else
+        ourRange = new Range(start, start);
+    } else {
+      ourRange = doc.sel.primary();
+      ourIndex = doc.sel.primIndex;
+    }
+
+    if (chromeOS ? e.shiftKey && e.metaKey : e.altKey) {
+      type = "rect";
+      if (!addNew) ourRange = new Range(start, start);
+      start = posFromMouse(cm, e, true, true);
+      ourIndex = -1;
+    } else if (type == "double") {
+      var word = cm.findWordAt(start);
+      if (cm.display.shift || doc.extend)
+        ourRange = extendRange(doc, ourRange, word.anchor, word.head);
+      else
+        ourRange = word;
+    } else if (type == "triple") {
+      var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1, 0)));
+      if (cm.display.shift || doc.extend)
+        ourRange = extendRange(doc, ourRange, line.anchor, line.head);
+      else
+        ourRange = line;
+    } else {
+      ourRange = extendRange(doc, ourRange, start);
+    }
+
+    if (!addNew) {
+      ourIndex = 0;
+      setSelection(doc, new Selection([ourRange], 0), sel_mouse);
+      startSel = doc.sel;
+    } else if (ourIndex == -1) {
+      ourIndex = ranges.length;
+      setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
+                   {scroll: false, origin: "*mouse"});
+    } else if (ranges.length > 1 && ranges[ourIndex].empty() && type == "single" && !e.shiftKey) {
+      setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+                   {scroll: false, origin: "*mouse"});
+      startSel = doc.sel;
+    } else {
+      replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
+    }
+
+    var lastPos = start;
+    function extendTo(pos) {
+      if (cmp(lastPos, pos) == 0) return;
+      lastPos = pos;
+
+      if (type == "rect") {
+        var ranges = [], tabSize = cm.options.tabSize;
+        var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
+        var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
+        var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
+        for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
+             line <= end; line++) {
+          var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
+          if (left == right)
+            ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos)));
+          else if (text.length > leftPos)
+            ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize))));
+        }
+        if (!ranges.length) ranges.push(new Range(start, start));
+        setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
+                     {origin: "*mouse", scroll: false});
+        cm.scrollIntoView(pos);
+      } else {
+        var oldRange = ourRange;
+        var anchor = oldRange.anchor, head = pos;
+        if (type != "single") {
+          if (type == "double")
+            var range = cm.findWordAt(pos);
+          else
+            var range = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line + 1, 0)));
+          if (cmp(range.anchor, anchor) > 0) {
+            head = range.head;
+            anchor = minPos(oldRange.from(), range.anchor);
+          } else {
+            head = range.anchor;
+            anchor = maxPos(oldRange.to(), range.head);
+          }
+        }
+        var ranges = startSel.ranges.slice(0);
+        ranges[ourIndex] = new Range(clipPos(doc, anchor), head);
+        setSelection(doc, normalizeSelection(ranges, ourIndex), sel_mouse);
+      }
+    }
+
+    var editorSize = display.wrapper.getBoundingClientRect();
+    // Used to ensure timeout re-tries don't fire when another extend
+    // happened in the meantime (clearTimeout isn't reliable -- at
+    // least on Chrome, the timeouts still happen even when cleared,
+    // if the clear happens after their scheduled firing time).
+    var counter = 0;
+
+    function extend(e) {
+      var curCount = ++counter;
+      var cur = posFromMouse(cm, e, true, type == "rect");
+      if (!cur) return;
+      if (cmp(cur, lastPos) != 0) {
+        cm.curOp.focus = activeElt();
+        extendTo(cur);
+        var visible = visibleLines(display, doc);
+        if (cur.line >= visible.to || cur.line < visible.from)
+          setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
+      } else {
+        var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
+        if (outside) setTimeout(operation(cm, function() {
+          if (counter != curCount) return;
+          display.scroller.scrollTop += outside;
+          extend(e);
+        }), 50);
+      }
+    }
+
+    function done(e) {
+      cm.state.selectingText = false;
+      counter = Infinity;
+      e_preventDefault(e);
+      display.input.focus();
+      off(document, "mousemove", move);
+      off(document, "mouseup", up);
+      doc.history.lastSelOrigin = null;
+    }
+
+    var move = operation(cm, function(e) {
+      if (!e_button(e)) done(e);
+      else extend(e);
+    });
+    var up = operation(cm, done);
+    cm.state.selectingText = up;
+    on(document, "mousemove", move);
+    on(document, "mouseup", up);
+  }
+
+  // Determines whether an event happened in the gutter, and fires the
+  // handlers for the corresponding event.
+  function gutterEvent(cm, e, type, prevent) {
+    try { var mX = e.clientX, mY = e.clientY; }
+    catch(e) { return false; }
+    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false;
+    if (prevent) e_preventDefault(e);
+
+    var display = cm.display;
+    var lineBox = display.lineDiv.getBoundingClientRect();
+
+    if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e);
+    mY -= lineBox.top - display.viewOffset;
+
+    for (var i = 0; i < cm.options.gutters.length; ++i) {
+      var g = display.gutters.childNodes[i];
+      if (g && g.getBoundingClientRect().right >= mX) {
+        var line = lineAtHeight(cm.doc, mY);
+        var gutter = cm.options.gutters[i];
+        signal(cm, type, cm, line, gutter, e);
+        return e_defaultPrevented(e);
+      }
+    }
+  }
+
+  function clickInGutter(cm, e) {
+    return gutterEvent(cm, e, "gutterClick", true);
+  }
+
+  // Kludge to work around strange IE behavior where it'll sometimes
+  // re-fire a series of drag-related events right after the drop (#1551)
+  var lastDrop = 0;
+
+  function onDrop(e) {
+    var cm = this;
+    clearDragCursor(cm);
+    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+      return;
+    e_preventDefault(e);
+    if (ie) lastDrop = +new Date;
+    var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
+    if (!pos || cm.isReadOnly()) return;
+    // Might be a file drop, in which case we simply extract the text
+    // and insert it.
+    if (files && files.length && window.FileReader && window.File) {
+      var n = files.length, text = Array(n), read = 0;
+      var loadFile = function(file, i) {
+        if (cm.options.allowDropFileTypes &&
+            indexOf(cm.options.allowDropFileTypes, file.type) == -1)
+          return;
+
+        var reader = new FileReader;
+        reader.onload = operation(cm, function() {
+          var content = reader.result;
+          if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) content = "";
+          text[i] = content;
+          if (++read == n) {
+            pos = clipPos(cm.doc, pos);
+            var change = {from: pos, to: pos,
+                          text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
+                          origin: "paste"};
+            makeChange(cm.doc, change);
+            setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
+          }
+        });
+        reader.readAsText(file);
+      };
+      for (var i = 0; i < n; ++i) loadFile(files[i], i);
+    } else { // Normal drop
+      // Don't do a replace if the drop happened inside of the selected text.
+      if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
+        cm.state.draggingText(e);
+        // Ensure the editor is re-focused
+        setTimeout(function() {cm.display.input.focus();}, 20);
+        return;
+      }
+      try {
+        var text = e.dataTransfer.getData("Text");
+        if (text) {
+          if (cm.state.draggingText && !(mac ? e.altKey : e.ctrlKey))
+            var selected = cm.listSelections();
+          setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
+          if (selected) for (var i = 0; i < selected.length; ++i)
+            replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag");
+          cm.replaceSelection(text, "around", "paste");
+          cm.display.input.focus();
+        }
+      }
+      catch(e){}
+    }
+  }
+
+  function onDragStart(cm, e) {
+    if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; }
+    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;
+
+    e.dataTransfer.setData("Text", cm.getSelection());
+    e.dataTransfer.effectAllowed = "copyMove"
+
+    // Use dummy image instead of default browsers image.
+    // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
+    if (e.dataTransfer.setDragImage && !safari) {
+      var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
+      img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
+      if (presto) {
+        img.width = img.height = 1;
+        cm.display.wrapper.appendChild(img);
+        // Force a relayout, or Opera won't use our image for some obscure reason
+        img._top = img.offsetTop;
+      }
+      e.dataTransfer.setDragImage(img, 0, 0);
+      if (presto) img.parentNode.removeChild(img);
+    }
+  }
+
+  function onDragOver(cm, e) {
+    var pos = posFromMouse(cm, e);
+    if (!pos) return;
+    var frag = document.createDocumentFragment();
+    drawSelectionCursor(cm, pos, frag);
+    if (!cm.display.dragCursor) {
+      cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
+      cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
+    }
+    removeChildrenAndAdd(cm.display.dragCursor, frag);
+  }
+
+  function clearDragCursor(cm) {
+    if (cm.display.dragCursor) {
+      cm.display.lineSpace.removeChild(cm.display.dragCursor);
+      cm.display.dragCursor = null;
+    }
+  }
+
+  // SCROLL EVENTS
+
+  // Sync the scrollable area and scrollbars, ensure the viewport
+  // covers the visible area.
+  function setScrollTop(cm, val) {
+    if (Math.abs(cm.doc.scrollTop - val) < 2) return;
+    cm.doc.scrollTop = val;
+    if (!gecko) updateDisplaySimple(cm, {top: val});
+    if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
+    cm.display.scrollbars.setScrollTop(val);
+    if (gecko) updateDisplaySimple(cm);
+    startWorker(cm, 100);
+  }
+  // Sync scroller and scrollbar, ensure the gutter elements are
+  // aligned.
+  function setScrollLeft(cm, val, isScroller) {
+    if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return;
+    val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
+    cm.doc.scrollLeft = val;
+    alignHorizontally(cm);
+    if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
+    cm.display.scrollbars.setScrollLeft(val);
+  }
+
+  // Since the delta values reported on mouse wheel events are
+  // unstandardized between browsers and even browser versions, and
+  // generally horribly unpredictable, this code starts by measuring
+  // the scroll effect that the first few mouse wheel events have,
+  // and, from that, detects the way it can convert deltas to pixel
+  // offsets afterwards.
+  //
+  // The reason we want to know the amount a wheel event will scroll
+  // is that it gives us a chance to update the display before the
+  // actual scrolling happens, reducing flickering.
+
+  var wheelSamples = 0, wheelPixelsPerUnit = null;
+  // Fill in a browser-detected starting value on browsers where we
+  // know one. These don't have to be accurate -- the result of them
+  // being wrong would just be a slight flicker on the first wheel
+  // scroll (if it is large enough).
+  if (ie) wheelPixelsPerUnit = -.53;
+  else if (gecko) wheelPixelsPerUnit = 15;
+  else if (chrome) wheelPixelsPerUnit = -.7;
+  else if (safari) wheelPixelsPerUnit = -1/3;
+
+  var wheelEventDelta = function(e) {
+    var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
+    if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
+    if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
+    else if (dy == null) dy = e.wheelDelta;
+    return {x: dx, y: dy};
+  };
+  CodeMirror.wheelEventPixels = function(e) {
+    var delta = wheelEventDelta(e);
+    delta.x *= wheelPixelsPerUnit;
+    delta.y *= wheelPixelsPerUnit;
+    return delta;
+  };
+
+  function onScrollWheel(cm, e) {
+    var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
+
+    var display = cm.display, scroll = display.scroller;
+    // Quit if there's nothing to scroll here
+    var canScrollX = scroll.scrollWidth > scroll.clientWidth;
+    var canScrollY = scroll.scrollHeight > scroll.clientHeight;
+    if (!(dx && canScrollX || dy && canScrollY)) return;
+
+    // Webkit browsers on OS X abort momentum scrolls when the target
+    // of the scroll event is removed from the scrollable element.
+    // This hack (see related code in patchDisplay) makes sure the
+    // element is kept around.
+    if (dy && mac && webkit) {
+      outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
+        for (var i = 0; i < view.length; i++) {
+          if (view[i].node == cur) {
+            cm.display.currentWheelTarget = cur;
+            break outer;
+          }
+        }
+      }
+    }
+
+    // On some browsers, horizontal scrolling will cause redraws to
+    // happen before the gutter has been realigned, causing it to
+    // wriggle around in a most unseemly way. When we have an
+    // estimated pixels/delta value, we just handle horizontal
+    // scrolling entirely here. It'll be slightly off from native, but
+    // better than glitching out.
+    if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
+      if (dy && canScrollY)
+        setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
+      setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
+      // Only prevent default scrolling if vertical scrolling is
+      // actually possible. Otherwise, it causes vertical scroll
+      // jitter on OSX trackpads when deltaX is small and deltaY
+      // is large (issue #3579)
+      if (!dy || (dy && canScrollY))
+        e_preventDefault(e);
+      display.wheelStartX = null; // Abort measurement, if in progress
+      return;
+    }
+
+    // 'Project' the visible viewport to cover the area that is being
+    // scrolled into view (if we know enough to estimate it).
+    if (dy && wheelPixelsPerUnit != null) {
+      var pixels = dy * wheelPixelsPerUnit;
+      var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
+      if (pixels < 0) top = Math.max(0, top + pixels - 50);
+      else bot = Math.min(cm.doc.height, bot + pixels + 50);
+      updateDisplaySimple(cm, {top: top, bottom: bot});
+    }
+
+    if (wheelSamples < 20) {
+      if (display.wheelStartX == null) {
+        display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
+        display.wheelDX = dx; display.wheelDY = dy;
+        setTimeout(function() {
+          if (display.wheelStartX == null) return;
+          var movedX = scroll.scrollLeft - display.wheelStartX;
+          var movedY = scroll.scrollTop - display.wheelStartY;
+          var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
+            (movedX && display.wheelDX && movedX / display.wheelDX);
+          display.wheelStartX = display.wheelStartY = null;
+          if (!sample) return;
+          wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
+          ++wheelSamples;
+        }, 200);
+      } else {
+        display.wheelDX += dx; display.wheelDY += dy;
+      }
+    }
+  }
+
+  // KEY EVENTS
+
+  // Run a handler that was bound to a key.
+  function doHandleBinding(cm, bound, dropShift) {
+    if (typeof bound == "string") {
+      bound = commands[bound];
+      if (!bound) return false;
+    }
+    // Ensure previous input has been read, so that the handler sees a
+    // consistent view of the document
+    cm.display.input.ensurePolled();
+    var prevShift = cm.display.shift, done = false;
+    try {
+      if (cm.isReadOnly()) cm.state.suppressEdits = true;
+      if (dropShift) cm.display.shift = false;
+      done = bound(cm) != Pass;
+    } finally {
+      cm.display.shift = prevShift;
+      cm.state.suppressEdits = false;
+    }
+    return done;
+  }
+
+  function lookupKeyForEditor(cm, name, handle) {
+    for (var i = 0; i < cm.state.keyMaps.length; i++) {
+      var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
+      if (result) return result;
+    }
+    return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
+      || lookupKey(name, cm.options.keyMap, handle, cm);
+  }
+
+  var stopSeq = new Delayed;
+  function dispatchKey(cm, name, e, handle) {
+    var seq = cm.state.keySeq;
+    if (seq) {
+      if (isModifierKey(name)) return "handled";
+      stopSeq.set(50, function() {
+        if (cm.state.keySeq == seq) {
+          cm.state.keySeq = null;
+          cm.display.input.reset();
+        }
+      });
+      name = seq + " " + name;
+    }
+    var result = lookupKeyForEditor(cm, name, handle);
+
+    if (result == "multi")
+      cm.state.keySeq = name;
+    if (result == "handled")
+      signalLater(cm, "keyHandled", cm, name, e);
+
+    if (result == "handled" || result == "multi") {
+      e_preventDefault(e);
+      restartBlink(cm);
+    }
+
+    if (seq && !result && /\'$/.test(name)) {
+      e_preventDefault(e);
+      return true;
+    }
+    return !!result;
+  }
+
+  // Handle a key from the keydown event.
+  function handleKeyBinding(cm, e) {
+    var name = keyName(e, true);
+    if (!name) return false;
+
+    if (e.shiftKey && !cm.state.keySeq) {
+      // First try to resolve full name (including 'Shift-'). Failing
+      // that, see if there is a cursor-motion command (starting with
+      // 'go') bound to the keyname without 'Shift-'.
+      return dispatchKey(cm, "Shift-" + name, e, function(b) {return doHandleBinding(cm, b, true);})
+          || dispatchKey(cm, name, e, function(b) {
+               if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+                 return doHandleBinding(cm, b);
+             });
+    } else {
+      return dispatchKey(cm, name, e, function(b) { return doHandleBinding(cm, b); });
+    }
+  }
+
+  // Handle a key from the keypress event
+  function handleCharBinding(cm, e, ch) {
+    return dispatchKey(cm, "'" + ch + "'", e,
+                       function(b) { return doHandleBinding(cm, b, true); });
+  }
+
+  var lastStoppedKey = null;
+  function onKeyDown(e) {
+    var cm = this;
+    cm.curOp.focus = activeElt();
+    if (signalDOMEvent(cm, e)) return;
+    // IE does strange things with escape.
+    if (ie && ie_version < 11 && e.keyCode == 27) e.returnValue = false;
+    var code = e.keyCode;
+    cm.display.shift = code == 16 || e.shiftKey;
+    var handled = handleKeyBinding(cm, e);
+    if (presto) {
+      lastStoppedKey = handled ? code : null;
+      // Opera has no cut event... we try to at least catch the key combo
+      if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
+        cm.replaceSelection("", null, "cut");
+    }
+
+    // Turn mouse into crosshair when Alt is held on Mac.
+    if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
+      showCrossHair(cm);
+  }
+
+  function showCrossHair(cm) {
+    var lineDiv = cm.display.lineDiv;
+    addClass(lineDiv, "CodeMirror-crosshair");
+
+    function up(e) {
+      if (e.keyCode == 18 || !e.altKey) {
+        rmClass(lineDiv, "CodeMirror-crosshair");
+        off(document, "keyup", up);
+        off(document, "mouseover", up);
+      }
+    }
+    on(document, "keyup", up);
+    on(document, "mouseover", up);
+  }
+
+  function onKeyUp(e) {
+    if (e.keyCode == 16) this.doc.sel.shift = false;
+    signalDOMEvent(this, e);
+  }
+
+  function onKeyPress(e) {
+    var cm = this;
+    if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) return;
+    var keyCode = e.keyCode, charCode = e.charCode;
+    if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
+    if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) return;
+    var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
+    if (handleCharBinding(cm, e, ch)) return;
+    cm.display.input.onKeyPress(e);
+  }
+
+  // FOCUS/BLUR EVENTS
+
+  function delayBlurEvent(cm) {
+    cm.state.delayingBlurEvent = true;
+    setTimeout(function() {
+      if (cm.state.delayingBlurEvent) {
+        cm.state.delayingBlurEvent = false;
+        onBlur(cm);
+      }
+    }, 100);
+  }
+
+  function onFocus(cm) {
+    if (cm.state.delayingBlurEvent) cm.state.delayingBlurEvent = false;
+
+    if (cm.options.readOnly == "nocursor") return;
+    if (!cm.state.focused) {
+      signal(cm, "focus", cm);
+      cm.state.focused = true;
+      addClass(cm.display.wrapper, "CodeMirror-focused");
+      // This test prevents this from firing when a context
+      // menu is closed (since the input reset would kill the
+      // select-all detection hack)
+      if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
+        cm.display.input.reset();
+        if (webkit) setTimeout(function() { cm.display.input.reset(true); }, 20); // Issue #1730
+      }
+      cm.display.input.receivedFocus();
+    }
+    restartBlink(cm);
+  }
+  function onBlur(cm) {
+    if (cm.state.delayingBlurEvent) return;
+
+    if (cm.state.focused) {
+      signal(cm, "blur", cm);
+      cm.state.focused = false;
+      rmClass(cm.display.wrapper, "CodeMirror-focused");
+    }
+    clearInterval(cm.display.blinker);
+    setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 150);
+  }
+
+  // CONTEXT MENU HANDLING
+
+  // To make the context menu work, we need to briefly unhide the
+  // textarea (making it as unobtrusive as possible) to let the
+  // right-click take effect on it.
+  function onContextMenu(cm, e) {
+    if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) return;
+    if (signalDOMEvent(cm, e, "contextmenu")) return;
+    cm.display.input.onContextMenu(e);
+  }
+
+  function contextMenuInGutter(cm, e) {
+    if (!hasHandler(cm, "gutterContextMenu")) return false;
+    return gutterEvent(cm, e, "gutterContextMenu", false);
+  }
+
+  // UPDATING
+
+  // Compute the position of the end of a change (its 'to' property
+  // refers to the pre-change end).
+  var changeEnd = CodeMirror.changeEnd = function(change) {
+    if (!change.text) return change.to;
+    return Pos(change.from.line + change.text.length - 1,
+               lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0));
+  };
+
+  // Adjust a position to refer to the post-change position of the
+  // same text, or the end of the change if the change covers it.
+  function adjustForChange(pos, change) {
+    if (cmp(pos, change.from) < 0) return pos;
+    if (cmp(pos, change.to) <= 0) return changeEnd(change);
+
+    var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
+    if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch;
+    return Pos(line, ch);
+  }
+
+  function computeSelAfterChange(doc, change) {
+    var out = [];
+    for (var i = 0; i < doc.sel.ranges.length; i++) {
+      var range = doc.sel.ranges[i];
+      out.push(new Range(adjustForChange(range.anchor, change),
+                         adjustForChange(range.head, change)));
+    }
+    return normalizeSelection(out, doc.sel.primIndex);
+  }
+
+  function offsetPos(pos, old, nw) {
+    if (pos.line == old.line)
+      return Pos(nw.line, pos.ch - old.ch + nw.ch);
+    else
+      return Pos(nw.line + (pos.line - old.line), pos.ch);
+  }
+
+  // Used by replaceSelections to allow moving the selection to the
+  // start or around the replaced test. Hint may be "start" or "around".
+  function computeReplacedSel(doc, changes, hint) {
+    var out = [];
+    var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
+    for (var i = 0; i < changes.length; i++) {
+      var change = changes[i];
+      var from = offsetPos(change.from, oldPrev, newPrev);
+      var to = offsetPos(changeEnd(change), oldPrev, newPrev);
+      oldPrev = change.to;
+      newPrev = to;
+      if (hint == "around") {
+        var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
+        out[i] = new Range(inv ? to : from, inv ? from : to);
+      } else {
+        out[i] = new Range(from, from);
+      }
+    }
+    return new Selection(out, doc.sel.primIndex);
+  }
+
+  // Allow "beforeChange" event handlers to influence a change
+  function filterChange(doc, change, update) {
+    var obj = {
+      canceled: false,
+      from: change.from,
+      to: change.to,
+      text: change.text,
+      origin: change.origin,
+      cancel: function() { this.canceled = true; }
+    };
+    if (update) obj.update = function(from, to, text, origin) {
+      if (from) this.from = clipPos(doc, from);
+      if (to) this.to = clipPos(doc, to);
+      if (text) this.text = text;
+      if (origin !== undefined) this.origin = origin;
+    };
+    signal(doc, "beforeChange", doc, obj);
+    if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj);
+
+    if (obj.canceled) return null;
+    return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin};
+  }
+
+  // Apply a change to a document, and add it to the document's
+  // history, and propagating it to all linked documents.
+  function makeChange(doc, change, ignoreReadOnly) {
+    if (doc.cm) {
+      if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly);
+      if (doc.cm.state.suppressEdits) return;
+    }
+
+    if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+      change = filterChange(doc, change, true);
+      if (!change) return;
+    }
+
+    // Possibly split or suppress the update based on the presence
+    // of read-only spans in its range.
+    var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
+    if (split) {
+      for (var i = split.length - 1; i >= 0; --i)
+        makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text});
+    } else {
+      makeChangeInner(doc, change);
+    }
+  }
+
+  function makeChangeInner(doc, change) {
+    if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) return;
+    var selAfter = computeSelAfterChange(doc, change);
+    addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
+
+    makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
+    var rebased = [];
+
+    linkedDocs(doc, function(doc, sharedHist) {
+      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+        rebaseHist(doc.history, change);
+        rebased.push(doc.history);
+      }
+      makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
+    });
+  }
+
+  // Revert a change stored in a document's history.
+  function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+    if (doc.cm && doc.cm.state.suppressEdits) return;
+
+    var hist = doc.history, event, selAfter = doc.sel;
+    var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
+
+    // Verify that there is a useable event (so that ctrl-z won't
+    // needlessly clear selection events)
+    for (var i = 0; i < source.length; i++) {
+      event = source[i];
+      if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
+        break;
+    }
+    if (i == source.length) return;
+    hist.lastOrigin = hist.lastSelOrigin = null;
+
+    for (;;) {
+      event = source.pop();
+      if (event.ranges) {
+        pushSelectionToHistory(event, dest);
+        if (allowSelectionOnly && !event.equals(doc.sel)) {
+          setSelection(doc, event, {clearRedo: false});
+          return;
+        }
+        selAfter = event;
+      }
+      else break;
+    }
+
+    // Build up a reverse change object to add to the opposite history
+    // stack (redo when undoing, and vice versa).
+    var antiChanges = [];
+    pushSelectionToHistory(selAfter, dest);
+    dest.push({changes: antiChanges, generation: hist.generation});
+    hist.generation = event.generation || ++hist.maxGeneration;
+
+    var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
+
+    for (var i = event.changes.length - 1; i >= 0; --i) {
+      var change = event.changes[i];
+      change.origin = type;
+      if (filter && !filterChange(doc, change, false)) {
+        source.length = 0;
+        return;
+      }
+
+      antiChanges.push(historyChangeFromChange(doc, change));
+
+      var after = i ? computeSelAfterChange(doc, change) : lst(source);
+      makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
+      if (!i && doc.cm) doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)});
+      var rebased = [];
+
+      // Propagate to the linked documents
+      linkedDocs(doc, function(doc, sharedHist) {
+        if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+          rebaseHist(doc.history, change);
+          rebased.push(doc.history);
+        }
+        makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
+      });
+    }
+  }
+
+  // Sub-views need their line numbers shifted when text is added
+  // above or below them in the parent document.
+  function shiftDoc(doc, distance) {
+    if (distance == 0) return;
+    doc.first += distance;
+    doc.sel = new Selection(map(doc.sel.ranges, function(range) {
+      return new Range(Pos(range.anchor.line + distance, range.anchor.ch),
+                       Pos(range.head.line + distance, range.head.ch));
+    }), doc.sel.primIndex);
+    if (doc.cm) {
+      regChange(doc.cm, doc.first, doc.first - distance, distance);
+      for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
+        regLineChange(doc.cm, l, "gutter");
+    }
+  }
+
+  // More lower-level change function, handling only a single document
+  // (not linked ones).
+  function makeChangeSingleDoc(doc, change, selAfter, spans) {
+    if (doc.cm && !doc.cm.curOp)
+      return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans);
+
+    if (change.to.line < doc.first) {
+      shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
+      return;
+    }
+    if (change.from.line > doc.lastLine()) return;
+
+    // Clip the change to the size of this doc
+    if (change.from.line < doc.first) {
+      var shift = change.text.length - 1 - (doc.first - change.from.line);
+      shiftDoc(doc, shift);
+      change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+                text: [lst(change.text)], origin: change.origin};
+    }
+    var last = doc.lastLine();
+    if (change.to.line > last) {
+      change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+                text: [change.text[0]], origin: change.origin};
+    }
+
+    change.removed = getBetween(doc, change.from, change.to);
+
+    if (!selAfter) selAfter = computeSelAfterChange(doc, change);
+    if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans);
+    else updateDoc(doc, change, spans);
+    setSelectionNoUndo(doc, selAfter, sel_dontScroll);
+  }
+
+  // Handle the interaction of a change to a document with the editor
+  // that this document is part of.
+  function makeChangeSingleDocInEditor(cm, change, spans) {
+    var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
+
+    var recomputeMaxLength = false, checkWidthStart = from.line;
+    if (!cm.options.lineWrapping) {
+      checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
+      doc.iter(checkWidthStart, to.line + 1, function(line) {
+        if (line == display.maxLine) {
+          recomputeMaxLength = true;
+          return true;
+        }
+      });
+    }
+
+    if (doc.sel.contains(change.from, change.to) > -1)
+      signalCursorActivity(cm);
+
+    updateDoc(doc, change, spans, estimateHeight(cm));
+
+    if (!cm.options.lineWrapping) {
+      doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
+        var len = lineLength(line);
+        if (len > display.maxLineLength) {
+          display.maxLine = line;
+          display.maxLineLength = len;
+          display.maxLineChanged = true;
+          recomputeMaxLength = false;
+        }
+      });
+      if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
+    }
+
+    // Adjust frontier, schedule worker
+    doc.frontier = Math.min(doc.frontier, from.line);
+    startWorker(cm, 400);
+
+    var lendiff = change.text.length - (to.line - from.line) - 1;
+    // Remember that these lines changed, for updating the display
+    if (change.full)
+      regChange(cm);
+    else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
+      regLineChange(cm, from.line, "text");
+    else
+      regChange(cm, from.line, to.line + 1, lendiff);
+
+    var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
+    if (changeHandler || changesHandler) {
+      var obj = {
+        from: from, to: to,
+        text: change.text,
+        removed: change.removed,
+        origin: change.origin
+      };
+      if (changeHandler) signalLater(cm, "change", cm, obj);
+      if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj);
+    }
+    cm.display.selForContextMenu = null;
+  }
+
+  function replaceRange(doc, code, from, to, origin) {
+    if (!to) to = from;
+    if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; }
+    if (typeof code == "string") code = doc.splitLines(code);
+    makeChange(doc, {from: from, to: to, text: code, origin: origin});
+  }
+
+  // SCROLLING THINGS INTO VIEW
+
+  // If an editor sits on the top or bottom of the window, partially
+  // scrolled out of view, this ensures that the cursor is visible.
+  function maybeScrollWindow(cm, coords) {
+    if (signalDOMEvent(cm, "scrollCursorIntoView")) return;
+
+    var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
+    if (coords.top + box.top < 0) doScroll = true;
+    else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
+    if (doScroll != null && !phantom) {
+      var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " +
+                           (coords.top - display.viewOffset - paddingTop(cm.display)) + "px; height: " +
+                           (coords.bottom - coords.top + scrollGap(cm) + display.barHeight) + "px; left: " +
+                           coords.left + "px; width: 2px;");
+      cm.display.lineSpace.appendChild(scrollNode);
+      scrollNode.scrollIntoView(doScroll);
+      cm.display.lineSpace.removeChild(scrollNode);
+    }
+  }
+
+  // Scroll a given position into view (immediately), verifying that
+  // it actually became visible (as line heights are accurately
+  // measured, the position of something may 'drift' during drawing).
+  function scrollPosIntoView(cm, pos, end, margin) {
+    if (margin == null) margin = 0;
+    for (var limit = 0; limit < 5; limit++) {
+      var changed = false, coords = cursorCoords(cm, pos);
+      var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
+      var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left),
+                                         Math.min(coords.top, endCoords.top) - margin,
+                                         Math.max(coords.left, endCoords.left),
+                                         Math.max(coords.bottom, endCoords.bottom) + margin);
+      var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
+      if (scrollPos.scrollTop != null) {
+        setScrollTop(cm, scrollPos.scrollTop);
+        if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;
+      }
+      if (scrollPos.scrollLeft != null) {
+        setScrollLeft(cm, scrollPos.scrollLeft);
+        if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
+      }
+      if (!changed) break;
+    }
+    return coords;
+  }
+
+  // Scroll a given set of coordinates into view (immediately).
+  function scrollIntoView(cm, x1, y1, x2, y2) {
+    var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
+    if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
+    if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
+  }
+
+  // Calculate a new scroll position needed to scroll the given
+  // rectangle into view. Returns an object with scrollTop and
+  // scrollLeft properties. When these are undefined, the
+  // vertical/horizontal position does not need to be adjusted.
+  function calculateScrollPos(cm, x1, y1, x2, y2) {
+    var display = cm.display, snapMargin = textHeight(cm.display);
+    if (y1 < 0) y1 = 0;
+    var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
+    var screen = displayHeight(cm), result = {};
+    if (y2 - y1 > screen) y2 = y1 + screen;
+    var docBottom = cm.doc.height + paddingVert(display);
+    var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
+    if (y1 < screentop) {
+      result.scrollTop = atTop ? 0 : y1;
+    } else if (y2 > screentop + screen) {
+      var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
+      if (newTop != screentop) result.scrollTop = newTop;
+    }
+
+    var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
+    var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
+    var tooWide = x2 - x1 > screenw;
+    if (tooWide) x2 = x1 + screenw;
+    if (x1 < 10)
+      result.scrollLeft = 0;
+    else if (x1 < screenleft)
+      result.scrollLeft = Math.max(0, x1 - (tooWide ? 0 : 10));
+    else if (x2 > screenw + screenleft - 3)
+      result.scrollLeft = x2 + (tooWide ? 0 : 10) - screenw;
+    return result;
+  }
+
+  // Store a relative adjustment to the scroll position in the current
+  // operation (to be applied when the operation finishes).
+  function addToScrollPos(cm, left, top) {
+    if (left != null || top != null) resolveScrollToPos(cm);
+    if (left != null)
+      cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : cm.curOp.scrollLeft) + left;
+    if (top != null)
+      cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
+  }
+
+  // Make sure that at the end of the operation the current cursor is
+  // shown.
+  function ensureCursorVisible(cm) {
+    resolveScrollToPos(cm);
+    var cur = cm.getCursor(), from = cur, to = cur;
+    if (!cm.options.lineWrapping) {
+      from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur;
+      to = Pos(cur.line, cur.ch + 1);
+    }
+    cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollMargin, isCursor: true};
+  }
+
+  // When an operation has its scrollToPos property set, and another
+  // scroll action is applied before the end of the operation, this
+  // 'simulates' scrolling that position into view in a cheap way, so
+  // that the effect of intermediate scroll commands is not ignored.
+  function resolveScrollToPos(cm) {
+    var range = cm.curOp.scrollToPos;
+    if (range) {
+      cm.curOp.scrollToPos = null;
+      var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to);
+      var sPos = calculateScrollPos(cm, Math.min(from.left, to.left),
+                                    Math.min(from.top, to.top) - range.margin,
+                                    Math.max(from.right, to.right),
+                                    Math.max(from.bottom, to.bottom) + range.margin);
+      cm.scrollTo(sPos.scrollLeft, sPos.scrollTop);
+    }
+  }
+
+  // API UTILITIES
+
+  // Indent the given line. The how parameter can be "smart",
+  // "add"/null, "subtract", or "prev". When aggressive is false
+  // (typically set to true for forced single-line indents), empty
+  // lines are not indented, and places where the mode returns Pass
+  // are left alone.
+  function indentLine(cm, n, how, aggressive) {
+    var doc = cm.doc, state;
+    if (how == null) how = "add";
+    if (how == "smart") {
+      // Fall back to "prev" when the mode doesn't have an indentation
+      // method.
+      if (!doc.mode.indent) how = "prev";
+      else state = getStateBefore(cm, n);
+    }
+
+    var tabSize = cm.options.tabSize;
+    var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
+    if (line.stateAfter) line.stateAfter = null;
+    var curSpaceString = line.text.match(/^\s*/)[0], indentation;
+    if (!aggressive && !/\S/.test(line.text)) {
+      indentation = 0;
+      how = "not";
+    } else if (how == "smart") {
+      indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
+      if (indentation == Pass || indentation > 150) {
+        if (!aggressive) return;
+        how = "prev";
+      }
+    }
+    if (how == "prev") {
+      if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
+      else indentation = 0;
+    } else if (how == "add") {
+      indentation = curSpace + cm.options.indentUnit;
+    } else if (how == "subtract") {
+      indentation = curSpace - cm.options.indentUnit;
+    } else if (typeof how == "number") {
+      indentation = curSpace + how;
+    }
+    indentation = Math.max(0, indentation);
+
+    var indentString = "", pos = 0;
+    if (cm.options.indentWithTabs)
+      for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
+    if (pos < indentation) indentString += spaceStr(indentation - pos);
+
+    if (indentString != curSpaceString) {
+      replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
+      line.stateAfter = null;
+      return true;
+    } else {
+      // Ensure that, if the cursor was in the whitespace at the start
+      // of the line, it is moved to the end of that space.
+      for (var i = 0; i < doc.sel.ranges.length; i++) {
+        var range = doc.sel.ranges[i];
+        if (range.head.line == n && range.head.ch < curSpaceString.length) {
+          var pos = Pos(n, curSpaceString.length);
+          replaceOneSelection(doc, i, new Range(pos, pos));
+          break;
+        }
+      }
+    }
+  }
+
+  // Utility for applying a change to a line by handle or number,
+  // returning the number and optionally registering the line as
+  // changed.
+  function changeLine(doc, handle, changeType, op) {
+    var no = handle, line = handle;
+    if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
+    else no = lineNo(handle);
+    if (no == null) return null;
+    if (op(line, no) && doc.cm) regLineChange(doc.cm, no, changeType);
+    return line;
+  }
+
+  // Helper for deleting text near the selection(s), used to implement
+  // backspace, delete, and similar functionality.
+  function deleteNearSelection(cm, compute) {
+    var ranges = cm.doc.sel.ranges, kill = [];
+    // Build up a set of ranges to kill first, merging overlapping
+    // ranges.
+    for (var i = 0; i < ranges.length; i++) {
+      var toKill = compute(ranges[i]);
+      while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
+        var replaced = kill.pop();
+        if (cmp(replaced.from, toKill.from) < 0) {
+          toKill.from = replaced.from;
+          break;
+        }
+      }
+      kill.push(toKill);
+    }
+    // Next, remove those actual ranges.
+    runInOp(cm, function() {
+      for (var i = kill.length - 1; i >= 0; i--)
+        replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete");
+      ensureCursorVisible(cm);
+    });
+  }
+
+  // Used for horizontal relative motion. Dir is -1 or 1 (left or
+  // right), unit can be "char", "column" (like char, but doesn't
+  // cross line boundaries), "word" (across next word), or "group" (to
+  // the start of next group of word or non-word-non-whitespace
+  // chars). The visually param controls whether, in right-to-left
+  // text, direction 1 means to move towards the next index in the
+  // string, or towards the character to the right of the current
+  // position. The resulting position will have a hitSide=true
+  // property if it reached the end of the document.
+  function findPosH(doc, pos, dir, unit, visually) {
+    var line = pos.line, ch = pos.ch, origDir = dir;
+    var lineObj = getLine(doc, line);
+    function findNextLine() {
+      var l = line + dir;
+      if (l < doc.first || l >= doc.first + doc.size) return false
+      line = l;
+      return lineObj = getLine(doc, l);
+    }
+    function moveOnce(boundToLine) {
+      var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
+      if (next == null) {
+        if (!boundToLine && findNextLine()) {
+          if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
+          else ch = dir < 0 ? lineObj.text.length : 0;
+        } else return false
+      } else ch = next;
+      return true;
+    }
+
+    if (unit == "char") {
+      moveOnce()
+    } else if (unit == "column") {
+      moveOnce(true)
+    } else if (unit == "word" || unit == "group") {
+      var sawType = null, group = unit == "group";
+      var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
+      for (var first = true;; first = false) {
+        if (dir < 0 && !moveOnce(!first)) break;
+        var cur = lineObj.text.charAt(ch) || "\n";
+        var type = isWordChar(cur, helper) ? "w"
+          : group && cur == "\n" ? "n"
+          : !group || /\s/.test(cur) ? null
+          : "p";
+        if (group && !first && !type) type = "s";
+        if (sawType && sawType != type) {
+          if (dir < 0) {dir = 1; moveOnce();}
+          break;
+        }
+
+        if (type) sawType = type;
+        if (dir > 0 && !moveOnce(!first)) break;
+      }
+    }
+    var result = skipAtomic(doc, Pos(line, ch), pos, origDir, true);
+    if (!cmp(pos, result)) result.hitSide = true;
+    return result;
+  }
+
+  // For relative vertical movement. Dir may be -1 or 1. Unit can be
+  // "page" or "line". The resulting position will have a hitSide=true
+  // property if it reached the end of the document.
+  function findPosV(cm, pos, dir, unit) {
+    var doc = cm.doc, x = pos.left, y;
+    if (unit == "page") {
+      var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
+      y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display));
+    } else if (unit == "line") {
+      y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
+    }
+    for (;;) {
+      var target = coordsChar(cm, x, y);
+      if (!target.outside) break;
+      if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
+      y += dir * 5;
+    }
+    return target;
+  }
+
+  // EDITOR METHODS
+
+  // The publicly visible API. Note that methodOp(f) means
+  // 'wrap f in an operation, performed on its `this` parameter'.
+
+  // This is not the complete set of editor methods. Most of the
+  // methods defined on the Doc type are also injected into
+  // CodeMirror.prototype, for backwards compatibility and
+  // convenience.
+
+  CodeMirror.prototype = {
+    constructor: CodeMirror,
+    focus: function(){window.focus(); this.display.input.focus();},
+
+    setOption: function(option, value) {
+      var options = this.options, old = options[option];
+      if (options[option] == value && option != "mode") return;
+      options[option] = value;
+      if (optionHandlers.hasOwnProperty(option))
+        operation(this, optionHandlers[option])(this, value, old);
+    },
+
+    getOption: function(option) {return this.options[option];},
+    getDoc: function() {return this.doc;},
+
+    addKeyMap: function(map, bottom) {
+      this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map));
+    },
+    removeKeyMap: function(map) {
+      var maps = this.state.keyMaps;
+      for (var i = 0; i < maps.length; ++i)
+        if (maps[i] == map || maps[i].name == map) {
+          maps.splice(i, 1);
+          return true;
+        }
+    },
+
+    addOverlay: methodOp(function(spec, options) {
+      var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
+      if (mode.startState) throw new Error("Overlays may not be stateful.");
+      this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
+      this.state.modeGen++;
+      regChange(this);
+    }),
+    removeOverlay: methodOp(function(spec) {
+      var overlays = this.state.overlays;
+      for (var i = 0; i < overlays.length; ++i) {
+        var cur = overlays[i].modeSpec;
+        if (cur == spec || typeof spec == "string" && cur.name == spec) {
+          overlays.splice(i, 1);
+          this.state.modeGen++;
+          regChange(this);
+          return;
+        }
+      }
+    }),
+
+    indentLine: methodOp(function(n, dir, aggressive) {
+      if (typeof dir != "string" && typeof dir != "number") {
+        if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
+        else dir = dir ? "add" : "subtract";
+      }
+      if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
+    }),
+    indentSelection: methodOp(function(how) {
+      var ranges = this.doc.sel.ranges, end = -1;
+      for (var i = 0; i < ranges.length; i++) {
+        var range = ranges[i];
+        if (!range.empty()) {
+          var from = range.from(), to = range.to();
+          var start = Math.max(end, from.line);
+          end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
+          for (var j = start; j < end; ++j)
+            indentLine(this, j, how);
+          var newRanges = this.doc.sel.ranges;
+          if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
+            replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll);
+        } else if (range.head.line > end) {
+          indentLine(this, range.head.line, how, true);
+          end = range.head.line;
+          if (i == this.doc.sel.primIndex) ensureCursorVisible(this);
+        }
+      }
+    }),
+
+    // Fetch the parser token for a given character. Useful for hacks
+    // that want to inspect the mode state (say, for completion).
+    getTokenAt: function(pos, precise) {
+      return takeToken(this, pos, precise);
+    },
+
+    getLineTokens: function(line, precise) {
+      return takeToken(this, Pos(line), precise, true);
+    },
+
+    getTokenTypeAt: function(pos) {
+      pos = clipPos(this.doc, pos);
+      var styles = getLineStyles(this, getLine(this.doc, pos.line));
+      var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
+      var type;
+      if (ch == 0) type = styles[2];
+      else for (;;) {
+        var mid = (before + after) >> 1;
+        if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
+        else if (styles[mid * 2 + 1] < ch) before = mid + 1;
+        else { type = styles[mid * 2 + 2]; break; }
+      }
+      var cut = type ? type.indexOf("cm-overlay ") : -1;
+      return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1);
+    },
+
+    getModeAt: function(pos) {
+      var mode = this.doc.mode;
+      if (!mode.innerMode) return mode;
+      return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
+    },
+
+    getHelper: function(pos, type) {
+      return this.getHelpers(pos, type)[0];
+    },
+
+    getHelpers: function(pos, type) {
+      var found = [];
+      if (!helpers.hasOwnProperty(type)) return found;
+      var help = helpers[type], mode = this.getModeAt(pos);
+      if (typeof mode[type] == "string") {
+        if (help[mode[type]]) found.push(help[mode[type]]);
+      } else if (mode[type]) {
+        for (var i = 0; i < mode[type].length; i++) {
+          var val = help[mode[type][i]];
+          if (val) found.push(val);
+        }
+      } else if (mode.helperType && help[mode.helperType]) {
+        found.push(help[mode.helperType]);
+      } else if (help[mode.name]) {
+        found.push(help[mode.name]);
+      }
+      for (var i = 0; i < help._global.length; i++) {
+        var cur = help._global[i];
+        if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
+          found.push(cur.val);
+      }
+      return found;
+    },
+
+    getStateAfter: function(line, precise) {
+      var doc = this.doc;
+      line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
+      return getStateBefore(this, line + 1, precise);
+    },
+
+    cursorCoords: function(start, mode) {
+      var pos, range = this.doc.sel.primary();
+      if (start == null) pos = range.head;
+      else if (typeof start == "object") pos = clipPos(this.doc, start);
+      else pos = start ? range.from() : range.to();
+      return cursorCoords(this, pos, mode || "page");
+    },
+
+    charCoords: function(pos, mode) {
+      return charCoords(this, clipPos(this.doc, pos), mode || "page");
+    },
+
+    coordsChar: function(coords, mode) {
+      coords = fromCoordSystem(this, coords, mode || "page");
+      return coordsChar(this, coords.left, coords.top);
+    },
+
+    lineAtHeight: function(height, mode) {
+      height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
+      return lineAtHeight(this.doc, height + this.display.viewOffset);
+    },
+    heightAtLine: function(line, mode) {
+      var end = false, lineObj;
+      if (typeof line == "number") {
+        var last = this.doc.first + this.doc.size - 1;
+        if (line < this.doc.first) line = this.doc.first;
+        else if (line > last) { line = last; end = true; }
+        lineObj = getLine(this.doc, line);
+      } else {
+        lineObj = line;
+      }
+      return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").top +
+        (end ? this.doc.height - heightAtLine(lineObj) : 0);
+    },
+
+    defaultTextHeight: function() { return textHeight(this.display); },
+    defaultCharWidth: function() { return charWidth(this.display); },
+
+    setGutterMarker: methodOp(function(line, gutterID, value) {
+      return changeLine(this.doc, line, "gutter", function(line) {
+        var markers = line.gutterMarkers || (line.gutterMarkers = {});
+        markers[gutterID] = value;
+        if (!value && isEmpty(markers)) line.gutterMarkers = null;
+        return true;
+      });
+    }),
+
+    clearGutter: methodOp(function(gutterID) {
+      var cm = this, doc = cm.doc, i = doc.first;
+      doc.iter(function(line) {
+        if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+          line.gutterMarkers[gutterID] = null;
+          regLineChange(cm, i, "gutter");
+          if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
+        }
+        ++i;
+      });
+    }),
+
+    lineInfo: function(line) {
+      if (typeof line == "number") {
+        if (!isLine(this.doc, line)) return null;
+        var n = line;
+        line = getLine(this.doc, line);
+        if (!line) return null;
+      } else {
+        var n = lineNo(line);
+        if (n == null) return null;
+      }
+      return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+              textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+              widgets: line.widgets};
+    },
+
+    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo};},
+
+    addWidget: function(pos, node, scroll, vert, horiz) {
+      var display = this.display;
+      pos = cursorCoords(this, clipPos(this.doc, pos));
+      var top = pos.bottom, left = pos.left;
+      node.style.position = "absolute";
+      node.setAttribute("cm-ignore-events", "true");
+      this.display.input.setUneditable(node);
+      display.sizer.appendChild(node);
+      if (vert == "over") {
+        top = pos.top;
+      } else if (vert == "above" || vert == "near") {
+        var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
+        hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
+        // Default to positioning above (if specified and possible); otherwise default to positioning below
+        if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
+          top = pos.top - node.offsetHeight;
+        else if (pos.bottom + node.offsetHeight <= vspace)
+          top = pos.bottom;
+        if (left + node.offsetWidth > hspace)
+          left = hspace - node.offsetWidth;
+      }
+      node.style.top = top + "px";
+      node.style.left = node.style.right = "";
+      if (horiz == "right") {
+        left = display.sizer.clientWidth - node.offsetWidth;
+        node.style.right = "0px";
+      } else {
+        if (horiz == "left") left = 0;
+        else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
+        node.style.left = left + "px";
+      }
+      if (scroll)
+        scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
+    },
+
+    triggerOnKeyDown: methodOp(onKeyDown),
+    triggerOnKeyPress: methodOp(onKeyPress),
+    triggerOnKeyUp: onKeyUp,
+
+    execCommand: function(cmd) {
+      if (commands.hasOwnProperty(cmd))
+        return commands[cmd].call(null, this);
+    },
+
+    triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
+
+    findPosH: function(from, amount, unit, visually) {
+      var dir = 1;
+      if (amount < 0) { dir = -1; amount = -amount; }
+      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
+        cur = findPosH(this.doc, cur, dir, unit, visually);
+        if (cur.hitSide) break;
+      }
+      return cur;
+    },
+
+    moveH: methodOp(function(dir, unit) {
+      var cm = this;
+      cm.extendSelectionsBy(function(range) {
+        if (cm.display.shift || cm.doc.extend || range.empty())
+          return findPosH(cm.doc, range.head, dir, unit, cm.options.rtlMoveVisually);
+        else
+          return dir < 0 ? range.from() : range.to();
+      }, sel_move);
+    }),
+
+    deleteH: methodOp(function(dir, unit) {
+      var sel = this.doc.sel, doc = this.doc;
+      if (sel.somethingSelected())
+        doc.replaceSelection("", null, "+delete");
+      else
+        deleteNearSelection(this, function(range) {
+          var other = findPosH(doc, range.head, dir, unit, false);
+          return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other};
+        });
+    }),
+
+    findPosV: function(from, amount, unit, goalColumn) {
+      var dir = 1, x = goalColumn;
+      if (amount < 0) { dir = -1; amount = -amount; }
+      for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
+        var coords = cursorCoords(this, cur, "div");
+        if (x == null) x = coords.left;
+        else coords.left = x;
+        cur = findPosV(this, coords, dir, unit);
+        if (cur.hitSide) break;
+      }
+      return cur;
+    },
+
+    moveV: methodOp(function(dir, unit) {
+      var cm = this, doc = this.doc, goals = [];
+      var collapse = !cm.display.shift && !doc.extend && doc.sel.somethingSelected();
+      doc.extendSelectionsBy(function(range) {
+        if (collapse)
+          return dir < 0 ? range.from() : range.to();
+        var headPos = cursorCoords(cm, range.head, "div");
+        if (range.goalColumn != null) headPos.left = range.goalColumn;
+        goals.push(headPos.left);
+        var pos = findPosV(cm, headPos, dir, unit);
+        if (unit == "page" && range == doc.sel.primary())
+          addToScrollPos(cm, null, charCoords(cm, pos, "div").top - headPos.top);
+        return pos;
+      }, sel_move);
+      if (goals.length) for (var i = 0; i < doc.sel.ranges.length; i++)
+        doc.sel.ranges[i].goalColumn = goals[i];
+    }),
+
+    // Find the word at the given position (as returned by coordsChar).
+    findWordAt: function(pos) {
+      var doc = this.doc, line = getLine(doc, pos.line).text;
+      var start = pos.ch, end = pos.ch;
+      if (line) {
+        var helper = this.getHelper(pos, "wordChars");
+        if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
+        var startChar = line.charAt(start);
+        var check = isWordChar(startChar, helper)
+          ? function(ch) { return isWordChar(ch, helper); }
+          : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
+          : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
+        while (start > 0 && check(line.charAt(start - 1))) --start;
+        while (end < line.length && check(line.charAt(end))) ++end;
+      }
+      return new Range(Pos(pos.line, start), Pos(pos.line, end));
+    },
+
+    toggleOverwrite: function(value) {
+      if (value != null && value == this.state.overwrite) return;
+      if (this.state.overwrite = !this.state.overwrite)
+        addClass(this.display.cursorDiv, "CodeMirror-overwrite");
+      else
+        rmClass(this.display.cursorDiv, "CodeMirror-overwrite");
+
+      signal(this, "overwriteToggle", this, this.state.overwrite);
+    },
+    hasFocus: function() { return this.display.input.getField() == activeElt(); },
+    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit); },
+
+    scrollTo: methodOp(function(x, y) {
+      if (x != null || y != null) resolveScrollToPos(this);
+      if (x != null) this.curOp.scrollLeft = x;
+      if (y != null) this.curOp.scrollTop = y;
+    }),
+    getScrollInfo: function() {
+      var scroller = this.display.scroller;
+      return {left: scroller.scrollLeft, top: scroller.scrollTop,
+              height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
+              width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
+              clientHeight: displayHeight(this), clientWidth: displayWidth(this)};
+    },
+
+    scrollIntoView: methodOp(function(range, margin) {
+      if (range == null) {
+        range = {from: this.doc.sel.primary().head, to: null};
+        if (margin == null) margin = this.options.cursorScrollMargin;
+      } else if (typeof range == "number") {
+        range = {from: Pos(range, 0), to: null};
+      } else if (range.from == null) {
+        range = {from: range, to: null};
+      }
+      if (!range.to) range.to = range.from;
+      range.margin = margin || 0;
+
+      if (range.from.line != null) {
+        resolveScrollToPos(this);
+        this.curOp.scrollToPos = range;
+      } else {
+        var sPos = calculateScrollPos(this, Math.min(range.from.left, range.to.left),
+                                      Math.min(range.from.top, range.to.top) - range.margin,
+                                      Math.max(range.from.right, range.to.right),
+                                      Math.max(range.from.bottom, range.to.bottom) + range.margin);
+        this.scrollTo(sPos.scrollLeft, sPos.scrollTop);
+      }
+    }),
+
+    setSize: methodOp(function(width, height) {
+      var cm = this;
+      function interpret(val) {
+        return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
+      }
+      if (width != null) cm.display.wrapper.style.width = interpret(width);
+      if (height != null) cm.display.wrapper.style.height = interpret(height);
+      if (cm.options.lineWrapping) clearLineMeasurementCache(this);
+      var lineNo = cm.display.viewFrom;
+      cm.doc.iter(lineNo, cm.display.viewTo, function(line) {
+        if (line.widgets) for (var i = 0; i < line.widgets.length; i++)
+          if (line.widgets[i].noHScroll) { regLineChange(cm, lineNo, "widget"); break; }
+        ++lineNo;
+      });
+      cm.curOp.forceUpdate = true;
+      signal(cm, "refresh", this);
+    }),
+
+    operation: function(f){return runInOp(this, f);},
+
+    refresh: methodOp(function() {
+      var oldHeight = this.display.cachedTextHeight;
+      regChange(this);
+      this.curOp.forceUpdate = true;
+      clearCaches(this);
+      this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop);
+      updateGutterSpace(this);
+      if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
+        estimateLineHeights(this);
+      signal(this, "refresh", this);
+    }),
+
+    swapDoc: methodOp(function(doc) {
+      var old = this.doc;
+      old.cm = null;
+      attachDoc(this, doc);
+      clearCaches(this);
+      this.display.input.reset();
+      this.scrollTo(doc.scrollLeft, doc.scrollTop);
+      this.curOp.forceScroll = true;
+      signalLater(this, "swapDoc", this, old);
+      return old;
+    }),
+
+    getInputField: function(){return this.display.input.getField();},
+    getWrapperElement: function(){return this.display.wrapper;},
+    getScrollerElement: function(){return this.display.scroller;},
+    getGutterElement: function(){return this.display.gutters;}
+  };
+  eventMixin(CodeMirror);
+
+  // OPTION DEFAULTS
+
+  // The default configuration options.
+  var defaults = CodeMirror.defaults = {};
+  // Functions to run when options are changed.
+  var optionHandlers = CodeMirror.optionHandlers = {};
+
+  function option(name, deflt, handle, notOnInit) {
+    CodeMirror.defaults[name] = deflt;
+    if (handle) optionHandlers[name] =
+      notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
+  }
+
+  // Passed to option handlers when there is no old value.
+  var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
+
+  // These two are, on init, called from the constructor because they
+  // have to be initialized before the editor can start at all.
+  option("value", "", function(cm, val) {
+    cm.setValue(val);
+  }, true);
+  option("mode", null, function(cm, val) {
+    cm.doc.modeOption = val;
+    loadMode(cm);
+  }, true);
+
+  option("indentUnit", 2, loadMode, true);
+  option("indentWithTabs", false);
+  option("smartIndent", true);
+  option("tabSize", 4, function(cm) {
+    resetModeState(cm);
+    clearCaches(cm);
+    regChange(cm);
+  }, true);
+  option("lineSeparator", null, function(cm, val) {
+    cm.doc.lineSep = val;
+    if (!val) return;
+    var newBreaks = [], lineNo = cm.doc.first;
+    cm.doc.iter(function(line) {
+      for (var pos = 0;;) {
+        var found = line.text.indexOf(val, pos);
+        if (found == -1) break;
+        pos = found + val.length;
+        newBreaks.push(Pos(lineNo, found));
+      }
+      lineNo++;
+    });
+    for (var i = newBreaks.length - 1; i >= 0; i--)
+      replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length))
+  });
+  option("specialChars", /[\u0000-\u001f\u007f\u00ad\u200b-\u200f\u2028\u2029\ufeff]/g, function(cm, val, old) {
+    cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
+    if (old != CodeMirror.Init) cm.refresh();
+  });
+  option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true);
+  option("electricChars", true);
+  option("inputStyle", mobile ? "contenteditable" : "textarea", function() {
+    throw new Error("inputStyle can not (yet) be changed in a running editor"); // FIXME
+  }, true);
+  option("rtlMoveVisually", !windows);
+  option("wholeLineUpdateBefore", true);
+
+  option("theme", "default", function(cm) {
+    themeChanged(cm);
+    guttersChanged(cm);
+  }, true);
+  option("keyMap", "default", function(cm, val, old) {
+    var next = getKeyMap(val);
+    var prev = old != CodeMirror.Init && getKeyMap(old);
+    if (prev && prev.detach) prev.detach(cm, next);
+    if (next.attach) next.attach(cm, prev || null);
+  });
+  option("extraKeys", null);
+
+  option("lineWrapping", false, wrappingChanged, true);
+  option("gutters", [], function(cm) {
+    setGuttersForLineNumbers(cm.options);
+    guttersChanged(cm);
+  }, true);
+  option("fixedGutter", true, function(cm, val) {
+    cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
+    cm.refresh();
+  }, true);
+  option("coverGutterNextToScrollbar", false, function(cm) {updateScrollbars(cm);}, true);
+  option("scrollbarStyle", "native", function(cm) {
+    initScrollbars(cm);
+    updateScrollbars(cm);
+    cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
+    cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
+  }, true);
+  option("lineNumbers", false, function(cm) {
+    setGuttersForLineNumbers(cm.options);
+    guttersChanged(cm);
+  }, true);
+  option("firstLineNumber", 1, guttersChanged, true);
+  option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
+  option("showCursorWhenSelecting", false, updateSelection, true);
+
+  option("resetSelectionOnContextMenu", true);
+  option("lineWiseCopyCut", true);
+
+  option("readOnly", false, function(cm, val) {
+    if (val == "nocursor") {
+      onBlur(cm);
+      cm.display.input.blur();
+      cm.display.disabled = true;
+    } else {
+      cm.display.disabled = false;
+    }
+    cm.display.input.readOnlyChanged(val)
+  });
+  option("disableInput", false, function(cm, val) {if (!val) cm.display.input.reset();}, true);
+  option("dragDrop", true, dragDropChanged);
+  option("allowDropFileTypes", null);
+
+  option("cursorBlinkRate", 530);
+  option("cursorScrollMargin", 0);
+  option("cursorHeight", 1, updateSelection, true);
+  option("singleCursorHeightPerLine", true, updateSelection, true);
+  option("workTime", 100);
+  option("workDelay", 100);
+  option("flattenSpans", true, resetModeState, true);
+  option("addModeClass", false, resetModeState, true);
+  option("pollInterval", 100);
+  option("undoDepth", 200, function(cm, val){cm.doc.history.undoDepth = val;});
+  option("historyEventDelay", 1250);
+  option("viewportMargin", 10, function(cm){cm.refresh();}, true);
+  option("maxHighlightLength", 10000, resetModeState, true);
+  option("moveInputWithCursor", true, function(cm, val) {
+    if (!val) cm.display.input.resetPosition();
+  });
+
+  option("tabindex", null, function(cm, val) {
+    cm.display.input.getField().tabIndex = val || "";
+  });
+  option("autofocus", null);
+
+  // MODE DEFINITION AND QUERYING
+
+  // Known modes, by name and by MIME
+  var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
+
+  // Extra arguments are stored as the mode's dependencies, which is
+  // used by (legacy) mechanisms like loadmode.js to automatically
+  // load a mode. (Preferred mechanism is the require/define calls.)
+  CodeMirror.defineMode = function(name, mode) {
+    if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
+    if (arguments.length > 2)
+      mode.dependencies = Array.prototype.slice.call(arguments, 2);
+    modes[name] = mode;
+  };
+
+  CodeMirror.defineMIME = function(mime, spec) {
+    mimeModes[mime] = spec;
+  };
+
+  // Given a MIME type, a {name, ...options} config object, or a name
+  // string, return a mode config object.
+  CodeMirror.resolveMode = function(spec) {
+    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
+      spec = mimeModes[spec];
+    } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+      var found = mimeModes[spec.name];
+      if (typeof found == "string") found = {name: found};
+      spec = createObj(found, spec);
+      spec.name = found.name;
+    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
+      return CodeMirror.resolveMode("application/xml");
+    }
+    if (typeof spec == "string") return {name: spec};
+    else return spec || {name: "null"};
+  };
+
+  // Given a mode spec (anything that resolveMode accepts), find and
+  // initialize an actual mode object.
+  CodeMirror.getMode = function(options, spec) {
+    var spec = CodeMirror.resolveMode(spec);
+    var mfactory = modes[spec.name];
+    if (!mfactory) return CodeMirror.getMode(options, "text/plain");
+    var modeObj = mfactory(options, spec);
+    if (modeExtensions.hasOwnProperty(spec.name)) {
+      var exts = modeExtensions[spec.name];
+      for (var prop in exts) {
+        if (!exts.hasOwnProperty(prop)) continue;
+        if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
+        modeObj[prop] = exts[prop];
+      }
+    }
+    modeObj.name = spec.name;
+    if (spec.helperType) modeObj.helperType = spec.helperType;
+    if (spec.modeProps) for (var prop in spec.modeProps)
+      modeObj[prop] = spec.modeProps[prop];
+
+    return modeObj;
+  };
+
+  // Minimal default mode.
+  CodeMirror.defineMode("null", function() {
+    return {token: function(stream) {stream.skipToEnd();}};
+  });
+  CodeMirror.defineMIME("text/plain", "null");
+
+  // This can be used to attach properties to mode objects from
+  // outside the actual mode definition.
+  var modeExtensions = CodeMirror.modeExtensions = {};
+  CodeMirror.extendMode = function(mode, properties) {
+    var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
+    copyObj(properties, exts);
+  };
+
+  // EXTENSIONS
+
+  CodeMirror.defineExtension = function(name, func) {
+    CodeMirror.prototype[name] = func;
+  };
+  CodeMirror.defineDocExtension = function(name, func) {
+    Doc.prototype[name] = func;
+  };
+  CodeMirror.defineOption = option;
+
+  var initHooks = [];
+  CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
+
+  var helpers = CodeMirror.helpers = {};
+  CodeMirror.registerHelper = function(type, name, value) {
+    if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_global: []};
+    helpers[type][name] = value;
+  };
+  CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
+    CodeMirror.registerHelper(type, name, value);
+    helpers[type]._global.push({pred: predicate, val: value});
+  };
+
+  // MODE STATE HANDLING
+
+  // Utility functions for working with state. Exported because nested
+  // modes need to do this for their inner modes.
+
+  var copyState = CodeMirror.copyState = function(mode, state) {
+    if (state === true) return state;
+    if (mode.copyState) return mode.copyState(state);
+    var nstate = {};
+    for (var n in state) {
+      var val = state[n];
+      if (val instanceof Array) val = val.concat([]);
+      nstate[n] = val;
+    }
+    return nstate;
+  };
+
+  var startState = CodeMirror.startState = function(mode, a1, a2) {
+    return mode.startState ? mode.startState(a1, a2) : true;
+  };
+
+  // Given a mode and a state (for that mode), find the inner mode and
+  // state at the position that the state refers to.
+  CodeMirror.innerMode = function(mode, state) {
+    while (mode.innerMode) {
+      var info = mode.innerMode(state);
+      if (!info || info.mode == mode) break;
+      state = info.state;
+      mode = info.mode;
+    }
+    return info || {mode: mode, state: state};
+  };
+
+  // STANDARD COMMANDS
+
+  // Commands are parameter-less actions that can be performed on an
+  // editor, mostly used for keybindings.
+  var commands = CodeMirror.commands = {
+    selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);},
+    singleSelection: function(cm) {
+      cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll);
+    },
+    killLine: function(cm) {
+      deleteNearSelection(cm, function(range) {
+        if (range.empty()) {
+          var len = getLine(cm.doc, range.head.line).text.length;
+          if (range.head.ch == len && range.head.line < cm.lastLine())
+            return {from: range.head, to: Pos(range.head.line + 1, 0)};
+          else
+            return {from: range.head, to: Pos(range.head.line, len)};
+        } else {
+          return {from: range.from(), to: range.to()};
+        }
+      });
+    },
+    deleteLine: function(cm) {
+      deleteNearSelection(cm, function(range) {
+        return {from: Pos(range.from().line, 0),
+                to: clipPos(cm.doc, Pos(range.to().line + 1, 0))};
+      });
+    },
+    delLineLeft: function(cm) {
+      deleteNearSelection(cm, function(range) {
+        return {from: Pos(range.from().line, 0), to: range.from()};
+      });
+    },
+    delWrappedLineLeft: function(cm) {
+      deleteNearSelection(cm, function(range) {
+        var top = cm.charCoords(range.head, "div").top + 5;
+        var leftPos = cm.coordsChar({left: 0, top: top}, "div");
+        return {from: leftPos, to: range.from()};
+      });
+    },
+    delWrappedLineRight: function(cm) {
+      deleteNearSelection(cm, function(range) {
+        var top = cm.charCoords(range.head, "div").top + 5;
+        var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
+        return {from: range.from(), to: rightPos };
+      });
+    },
+    undo: function(cm) {cm.undo();},
+    redo: function(cm) {cm.redo();},
+    undoSelection: function(cm) {cm.undoSelection();},
+    redoSelection: function(cm) {cm.redoSelection();},
+    goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
+    goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
+    goLineStart: function(cm) {
+      cm.extendSelectionsBy(function(range) { return lineStart(cm, range.head.line); },
+                            {origin: "+move", bias: 1});
+    },
+    goLineStartSmart: function(cm) {
+      cm.extendSelectionsBy(function(range) {
+        return lineStartSmart(cm, range.head);
+      }, {origin: "+move", bias: 1});
+    },
+    goLineEnd: function(cm) {
+      cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line); },
+                            {origin: "+move", bias: -1});
+    },
+    goLineRight: function(cm) {
+      cm.extendSelectionsBy(function(range) {
+        var top = cm.charCoords(range.head, "div").top + 5;
+        return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
+      }, sel_move);
+    },
+    goLineLeft: function(cm) {
+      cm.extendSelectionsBy(function(range) {
+        var top = cm.charCoords(range.head, "div").top + 5;
+        return cm.coordsChar({left: 0, top: top}, "div");
+      }, sel_move);
+    },
+    goLineLeftSmart: function(cm) {
+      cm.extendSelectionsBy(function(range) {
+        var top = cm.charCoords(range.head, "div").top + 5;
+        var pos = cm.coordsChar({left: 0, top: top}, "div");
+        if (pos.ch < cm.getLine(pos.line).search(/\S/)) return lineStartSmart(cm, range.head);
+        return pos;
+      }, sel_move);
+    },
+    goLineUp: function(cm) {cm.moveV(-1, "line");},
+    goLineDown: function(cm) {cm.moveV(1, "line");},
+    goPageUp: function(cm) {cm.moveV(-1, "page");},
+    goPageDown: function(cm) {cm.moveV(1, "page");},
+    goCharLeft: function(cm) {cm.moveH(-1, "char");},
+    goCharRight: function(cm) {cm.moveH(1, "char");},
+    goColumnLeft: function(cm) {cm.moveH(-1, "column");},
+    goColumnRight: function(cm) {cm.moveH(1, "column");},
+    goWordLeft: function(cm) {cm.moveH(-1, "word");},
+    goGroupRight: function(cm) {cm.moveH(1, "group");},
+    goGroupLeft: function(cm) {cm.moveH(-1, "group");},
+    goWordRight: function(cm) {cm.moveH(1, "word");},
+    delCharBefore: function(cm) {cm.deleteH(-1, "char");},
+    delCharAfter: function(cm) {cm.deleteH(1, "char");},
+    delWordBefore: function(cm) {cm.deleteH(-1, "word");},
+    delWordAfter: function(cm) {cm.deleteH(1, "word");},
+    delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
+    delGroupAfter: function(cm) {cm.deleteH(1, "group");},
+    indentAuto: function(cm) {cm.indentSelection("smart");},
+    indentMore: function(cm) {cm.indentSelection("add");},
+    indentLess: function(cm) {cm.indentSelection("subtract");},
+    insertTab: function(cm) {cm.replaceSelection("\t");},
+    insertSoftTab: function(cm) {
+      var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
+      for (var i = 0; i < ranges.length; i++) {
+        var pos = ranges[i].from();
+        var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
+        spaces.push(spaceStr(tabSize - col % tabSize));
+      }
+      cm.replaceSelections(spaces);
+    },
+    defaultTab: function(cm) {
+      if (cm.somethingSelected()) cm.indentSelection("add");
+      else cm.execCommand("insertTab");
+    },
+    transposeChars: function(cm) {
+      runInOp(cm, function() {
+        var ranges = cm.listSelections(), newSel = [];
+        for (var i = 0; i < ranges.length; i++) {
+          var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
+          if (line) {
+            if (cur.ch == line.length) cur = new Pos(cur.line, cur.ch - 1);
+            if (cur.ch > 0) {
+              cur = new Pos(cur.line, cur.ch + 1);
+              cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
+                              Pos(cur.line, cur.ch - 2), cur, "+transpose");
+            } else if (cur.line > cm.doc.first) {
+              var prev = getLine(cm.doc, cur.line - 1).text;
+              if (prev)
+                cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+                                prev.charAt(prev.length - 1),
+                                Pos(cur.line - 1, prev.length - 1), Pos(cur.line, 1), "+transpose");
+            }
+          }
+          newSel.push(new Range(cur, cur));
+        }
+        cm.setSelections(newSel);
+      });
+    },
+    newlineAndIndent: function(cm) {
+      runInOp(cm, function() {
+        var len = cm.listSelections().length;
+        for (var i = 0; i < len; i++) {
+          var range = cm.listSelections()[i];
+          cm.replaceRange(cm.doc.lineSeparator(), range.anchor, range.head, "+input");
+          cm.indentLine(range.from().line + 1, null, true);
+        }
+        ensureCursorVisible(cm);
+      });
+    },
+    openLine: function(cm) {cm.replaceSelection("\n", "start")},
+    toggleOverwrite: function(cm) {cm.toggleOverwrite();}
+  };
+
+
+  // STANDARD KEYMAPS
+
+  var keyMap = CodeMirror.keyMap = {};
+
+  keyMap.basic = {
+    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+    "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+    "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+    "Esc": "singleSelection"
+  };
+  // Note that the save and find-related commands aren't defined by
+  // default. User code or addons can define them. Unknown commands
+  // are simply ignored.
+  keyMap.pcDefault = {
+    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+    "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+    "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+    "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+    "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+    fallthrough: "basic"
+  };
+  // Very basic readline/emacs-style bindings, which are standard on Mac.
+  keyMap.emacsy = {
+    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+    "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
+    "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
+    "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
+    "Ctrl-O": "openLine"
+  };
+  keyMap.macDefault = {
+    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+    "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+    "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+    "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+    "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+    "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+    fallthrough: ["basic", "emacsy"]
+  };
+  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
+
+  // KEYMAP DISPATCH
+
+  function normalizeKeyName(name) {
+    var parts = name.split(/-(?!$)/), name = parts[parts.length - 1];
+    var alt, ctrl, shift, cmd;
+    for (var i = 0; i < parts.length - 1; i++) {
+      var mod = parts[i];
+      if (/^(cmd|meta|m)$/i.test(mod)) cmd = true;
+      else if (/^a(lt)?$/i.test(mod)) alt = true;
+      else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true;
+      else if (/^s(hift)$/i.test(mod)) shift = true;
+      else throw new Error("Unrecognized modifier name: " + mod);
+    }
+    if (alt) name = "Alt-" + name;
+    if (ctrl) name = "Ctrl-" + name;
+    if (cmd) name = "Cmd-" + name;
+    if (shift) name = "Shift-" + name;
+    return name;
+  }
+
+  // This is a kludge to keep keymaps mostly working as raw objects
+  // (backwards compatibility) while at the same time support features
+  // like normalization and multi-stroke key bindings. It compiles a
+  // new normalized keymap, and then updates the old object to reflect
+  // this.
+  CodeMirror.normalizeKeyMap = function(keymap) {
+    var copy = {};
+    for (var keyname in keymap) if (keymap.hasOwnProperty(keyname)) {
+      var value = keymap[keyname];
+      if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) continue;
+      if (value == "...") { delete keymap[keyname]; continue; }
+
+      var keys = map(keyname.split(" "), normalizeKeyName);
+      for (var i = 0; i < keys.length; i++) {
+        var val, name;
+        if (i == keys.length - 1) {
+          name = keys.join(" ");
+          val = value;
+        } else {
+          name = keys.slice(0, i + 1).join(" ");
+          val = "...";
+        }
+        var prev = copy[name];
+        if (!prev) copy[name] = val;
+        else if (prev != val) throw new Error("Inconsistent bindings for " + name);
+      }
+      delete keymap[keyname];
+    }
+    for (var prop in copy) keymap[prop] = copy[prop];
+    return keymap;
+  };
+
+  var lookupKey = CodeMirror.lookupKey = function(key, map, handle, context) {
+    map = getKeyMap(map);
+    var found = map.call ? map.call(key, context) : map[key];
+    if (found === false) return "nothing";
+    if (found === "...") return "multi";
+    if (found != null && handle(found)) return "handled";
+
+    if (map.fallthrough) {
+      if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
+        return lookupKey(key, map.fallthrough, handle, context);
+      for (var i = 0; i < map.fallthrough.length; i++) {
+        var result = lookupKey(key, map.fallthrough[i], handle, context);
+        if (result) return result;
+      }
+    }
+  };
+
+  // Modifier key presses don't count as 'real' key presses for the
+  // purpose of keymap fallthrough.
+  var isModifierKey = CodeMirror.isModifierKey = function(value) {
+    var name = typeof value == "string" ? value : keyNames[value.keyCode];
+    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
+  };
+
+  // Look up the name of a key as indicated by an event object.
+  var keyName = CodeMirror.keyName = function(event, noShift) {
+    if (presto && event.keyCode == 34 && event["char"]) return false;
+    var base = keyNames[event.keyCode], name = base;
+    if (name == null || event.altGraphKey) return false;
+    if (event.altKey && base != "Alt") name = "Alt-" + name;
+    if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") name = "Ctrl-" + name;
+    if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") name = "Cmd-" + name;
+    if (!noShift && event.shiftKey && base != "Shift") name = "Shift-" + name;
+    return name;
+  };
+
+  function getKeyMap(val) {
+    return typeof val == "string" ? keyMap[val] : val;
+  }
+
+  // FROMTEXTAREA
+
+  CodeMirror.fromTextArea = function(textarea, options) {
+    options = options ? copyObj(options) : {};
+    options.value = textarea.value;
+    if (!options.tabindex && textarea.tabIndex)
+      options.tabindex = textarea.tabIndex;
+    if (!options.placeholder && textarea.placeholder)
+      options.placeholder = textarea.placeholder;
+    // Set autofocus to true if this textarea is focused, or if it has
+    // autofocus and no other element is focused.
+    if (options.autofocus == null) {
+      var hasFocus = activeElt();
+      options.autofocus = hasFocus == textarea ||
+        textarea.getAttribute("autofocus") != null && hasFocus == document.body;
+    }
+
+    function save() {textarea.value = cm.getValue();}
+    if (textarea.form) {
+      on(textarea.form, "submit", save);
+      // Deplorable hack to make the submit method do the right thing.
+      if (!options.leaveSubmitMethodAlone) {
+        var form = textarea.form, realSubmit = form.submit;
+        try {
+          var wrappedSubmit = form.submit = function() {
+            save();
+            form.submit = realSubmit;
+            form.submit();
+            form.submit = wrappedSubmit;
+          };
+        } catch(e) {}
+      }
+    }
+
+    options.finishInit = function(cm) {
+      cm.save = save;
+      cm.getTextArea = function() { return textarea; };
+      cm.toTextArea = function() {
+        cm.toTextArea = isNaN; // Prevent this from being ran twice
+        save();
+        textarea.parentNode.removeChild(cm.getWrapperElement());
+        textarea.style.display = "";
+        if (textarea.form) {
+          off(textarea.form, "submit", save);
+          if (typeof textarea.form.submit == "function")
+            textarea.form.submit = realSubmit;
+        }
+      };
+    };
+
+    textarea.style.display = "none";
+    var cm = CodeMirror(function(node) {
+      textarea.parentNode.insertBefore(node, textarea.nextSibling);
+    }, options);
+    return cm;
+  };
+
+  // STRING STREAM
+
+  // Fed to the mode parsers, provides helper functions to make
+  // parsers more succinct.
+
+  var StringStream = CodeMirror.StringStream = function(string, tabSize) {
+    this.pos = this.start = 0;
+    this.string = string;
+    this.tabSize = tabSize || 8;
+    this.lastColumnPos = this.lastColumnValue = 0;
+    this.lineStart = 0;
+  };
+
+  StringStream.prototype = {
+    eol: function() {return this.pos >= this.string.length;},
+    sol: function() {return this.pos == this.lineStart;},
+    peek: function() {return this.string.charAt(this.pos) || undefined;},
+    next: function() {
+      if (this.pos < this.string.length)
+        return this.string.charAt(this.pos++);
+    },
+    eat: function(match) {
+      var ch = this.string.charAt(this.pos);
+      if (typeof match == "string") var ok = ch == match;
+      else var ok = ch && (match.test ? match.test(ch) : match(ch));
+      if (ok) {++this.pos; return ch;}
+    },
+    eatWhile: function(match) {
+      var start = this.pos;
+      while (this.eat(match)){}
+      return this.pos > start;
+    },
+    eatSpace: function() {
+      var start = this.pos;
+      while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
+      return this.pos > start;
+    },
+    skipToEnd: function() {this.pos = this.string.length;},
+    skipTo: function(ch) {
+      var found = this.string.indexOf(ch, this.pos);
+      if (found > -1) {this.pos = found; return true;}
+    },
+    backUp: function(n) {this.pos -= n;},
+    column: function() {
+      if (this.lastColumnPos < this.start) {
+        this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
+        this.lastColumnPos = this.start;
+      }
+      return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
+    },
+    indentation: function() {
+      return countColumn(this.string, null, this.tabSize) -
+        (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
+    },
+    match: function(pattern, consume, caseInsensitive) {
+      if (typeof pattern == "string") {
+        var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
+        var substr = this.string.substr(this.pos, pattern.length);
+        if (cased(substr) == cased(pattern)) {
+          if (consume !== false) this.pos += pattern.length;
+          return true;
+        }
+      } else {
+        var match = this.string.slice(this.pos).match(pattern);
+        if (match && match.index > 0) return null;
+        if (match && consume !== false) this.pos += match[0].length;
+        return match;
+      }
+    },
+    current: function(){return this.string.slice(this.start, this.pos);},
+    hideFirstChars: function(n, inner) {
+      this.lineStart += n;
+      try { return inner(); }
+      finally { this.lineStart -= n; }
+    }
+  };
+
+  // TEXTMARKERS
+
+  // Created with markText and setBookmark methods. A TextMarker is a
+  // handle that can be used to clear or find a marked position in the
+  // document. Line objects hold arrays (markedSpans) containing
+  // {from, to, marker} object pointing to such marker objects, and
+  // indicating that such a marker is present on that line. Multiple
+  // lines may point to the same marker when it spans across lines.
+  // The spans will have null for their from/to properties when the
+  // marker continues beyond the start/end of the line. Markers have
+  // links back to the lines they currently touch.
+
+  var nextMarkerId = 0;
+
+  var TextMarker = CodeMirror.TextMarker = function(doc, type) {
+    this.lines = [];
+    this.type = type;
+    this.doc = doc;
+    this.id = ++nextMarkerId;
+  };
+  eventMixin(TextMarker);
+
+  // Clear the marker.
+  TextMarker.prototype.clear = function() {
+    if (this.explicitlyCleared) return;
+    var cm = this.doc.cm, withOp = cm && !cm.curOp;
+    if (withOp) startOperation(cm);
+    if (hasHandler(this, "clear")) {
+      var found = this.find();
+      if (found) signalLater(this, "clear", found.from, found.to);
+    }
+    var min = null, max = null;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this);
+      if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text");
+      else if (cm) {
+        if (span.to != null) max = lineNo(line);
+        if (span.from != null) min = lineNo(line);
+      }
+      line.markedSpans = removeMarkedSpan(line.markedSpans, span);
+      if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
+        updateLineHeight(line, textHeight(cm.display));
+    }
+    if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
+      var visual = visualLine(this.lines[i]), len = lineLength(visual);
+      if (len > cm.display.maxLineLength) {
+        cm.display.maxLine = visual;
+        cm.display.maxLineLength = len;
+        cm.display.maxLineChanged = true;
+      }
+    }
+
+    if (min != null && cm && this.collapsed) regChange(cm, min, max + 1);
+    this.lines.length = 0;
+    this.explicitlyCleared = true;
+    if (this.atomic && this.doc.cantEdit) {
+      this.doc.cantEdit = false;
+      if (cm) reCheckSelection(cm.doc);
+    }
+    if (cm) signalLater(cm, "markerCleared", cm, this);
+    if (withOp) endOperation(cm);
+    if (this.parent) this.parent.clear();
+  };
+
+  // Find the position of the marker in the document. Returns a {from,
+  // to} object by default. Side can be passed to get a specific side
+  // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
+  // Pos objects returned contain a line object, rather than a line
+  // number (used to prevent looking up the same line twice).
+  TextMarker.prototype.find = function(side, lineObj) {
+    if (side == null && this.type == "bookmark") side = 1;
+    var from, to;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this);
+      if (span.from != null) {
+        from = Pos(lineObj ? line : lineNo(line), span.from);
+        if (side == -1) return from;
+      }
+      if (span.to != null) {
+        to = Pos(lineObj ? line : lineNo(line), span.to);
+        if (side == 1) return to;
+      }
+    }
+    return from && {from: from, to: to};
+  };
+
+  // Signals that the marker's widget changed, and surrounding layout
+  // should be recomputed.
+  TextMarker.prototype.changed = function() {
+    var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
+    if (!pos || !cm) return;
+    runInOp(cm, function() {
+      var line = pos.line, lineN = lineNo(pos.line);
+      var view = findViewForLine(cm, lineN);
+      if (view) {
+        clearLineMeasurementCacheFor(view);
+        cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
+      }
+      cm.curOp.updateMaxLine = true;
+      if (!lineIsHidden(widget.doc, line) && widget.height != null) {
+        var oldHeight = widget.height;
+        widget.height = null;
+        var dHeight = widgetHeight(widget) - oldHeight;
+        if (dHeight)
+          updateLineHeight(line, line.height + dHeight);
+      }
+    });
+  };
+
+  TextMarker.prototype.attachLine = function(line) {
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp;
+      if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+        (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
+    }
+    this.lines.push(line);
+  };
+  TextMarker.prototype.detachLine = function(line) {
+    this.lines.splice(indexOf(this.lines, line), 1);
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp;
+      (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
+    }
+  };
+
+  // Collapsed markers have unique ids, in order to be able to order
+  // them, which is needed for uniquely determining an outer marker
+  // when they overlap (they may nest, but not partially overlap).
+  var nextMarkerId = 0;
+
+  // Create a marker, wire it up to the right lines, and
+  function markText(doc, from, to, options, type) {
+    // Shared markers (across linked documents) are handled separately
+    // (markTextShared will call out to this again, once per
+    // document).
+    if (options && options.shared) return markTextShared(doc, from, to, options, type);
+    // Ensure we are in an operation.
+    if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type);
+
+    var marker = new TextMarker(doc, type), diff = cmp(from, to);
+    if (options) copyObj(options, marker, false);
+    // Don't connect empty markers unless clearWhenEmpty is false
+    if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
+      return marker;
+    if (marker.replacedWith) {
+      // Showing up as a widget implies collapsed (widget replaces text)
+      marker.collapsed = true;
+      marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget");
+      if (!options.handleMouseEvents) marker.widgetNode.setAttribute("cm-ignore-events", "true");
+      if (options.insertLeft) marker.widgetNode.insertLeft = true;
+    }
+    if (marker.collapsed) {
+      if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+          from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+        throw new Error("Inserting collapsed marker partially overlapping an existing one");
+      sawCollapsedSpans = true;
+    }
+
+    if (marker.addToHistory)
+      addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN);
+
+    var curLine = from.line, cm = doc.cm, updateMaxLine;
+    doc.iter(curLine, to.line + 1, function(line) {
+      if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
+        updateMaxLine = true;
+      if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0);
+      addMarkedSpan(line, new MarkedSpan(marker,
+                                         curLine == from.line ? from.ch : null,
+                                         curLine == to.line ? to.ch : null));
+      ++curLine;
+    });
+    // lineIsHidden depends on the presence of the spans, so needs a second pass
+    if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
+      if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
+    });
+
+    if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });
+
+    if (marker.readOnly) {
+      sawReadOnlySpans = true;
+      if (doc.history.done.length || doc.history.undone.length)
+        doc.clearHistory();
+    }
+    if (marker.collapsed) {
+      marker.id = ++nextMarkerId;
+      marker.atomic = true;
+    }
+    if (cm) {
+      // Sync editor state
+      if (updateMaxLine) cm.curOp.updateMaxLine = true;
+      if (marker.collapsed)
+        regChange(cm, from.line, to.line + 1);
+      else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
+        for (var i = from.line; i <= to.line; i++) regLineChange(cm, i, "text");
+      if (marker.atomic) reCheckSelection(cm.doc);
+      signalLater(cm, "markerAdded", cm, marker);
+    }
+    return marker;
+  }
+
+  // SHARED TEXTMARKERS
+
+  // A shared marker spans multiple linked documents. It is
+  // implemented as a meta-marker-object controlling multiple normal
+  // markers.
+  var SharedTextMarker = CodeMirror.SharedTextMarker = function(markers, primary) {
+    this.markers = markers;
+    this.primary = primary;
+    for (var i = 0; i < markers.length; ++i)
+      markers[i].parent = this;
+  };
+  eventMixin(SharedTextMarker);
+
+  SharedTextMarker.prototype.clear = function() {
+    if (this.explicitlyCleared) return;
+    this.explicitlyCleared = true;
+    for (var i = 0; i < this.markers.length; ++i)
+      this.markers[i].clear();
+    signalLater(this, "clear");
+  };
+  SharedTextMarker.prototype.find = function(side, lineObj) {
+    return this.primary.find(side, lineObj);
+  };
+
+  function markTextShared(doc, from, to, options, type) {
+    options = copyObj(options);
+    options.shared = false;
+    var markers = [markText(doc, from, to, options, type)], primary = markers[0];
+    var widget = options.widgetNode;
+    linkedDocs(doc, function(doc) {
+      if (widget) options.widgetNode = widget.cloneNode(true);
+      markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
+      for (var i = 0; i < doc.linked.length; ++i)
+        if (doc.linked[i].isParent) return;
+      primary = lst(markers);
+    });
+    return new SharedTextMarker(markers, primary);
+  }
+
+  function findSharedMarkers(doc) {
+    return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())),
+                         function(m) { return m.parent; });
+  }
+
+  function copySharedMarkers(doc, markers) {
+    for (var i = 0; i < markers.length; i++) {
+      var marker = markers[i], pos = marker.find();
+      var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
+      if (cmp(mFrom, mTo)) {
+        var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
+        marker.markers.push(subMark);
+        subMark.parent = marker;
+      }
+    }
+  }
+
+  function detachSharedMarkers(markers) {
+    for (var i = 0; i < markers.length; i++) {
+      var marker = markers[i], linked = [marker.primary.doc];;
+      linkedDocs(marker.primary.doc, function(d) { linked.push(d); });
+      for (var j = 0; j < marker.markers.length; j++) {
+        var subMarker = marker.markers[j];
+        if (indexOf(linked, subMarker.doc) == -1) {
+          subMarker.parent = null;
+          marker.markers.splice(j--, 1);
+        }
+      }
+    }
+  }
+
+  // TEXTMARKER SPANS
+
+  function MarkedSpan(marker, from, to) {
+    this.marker = marker;
+    this.from = from; this.to = to;
+  }
+
+  // Search an array of spans for a span matching the given marker.
+  function getMarkedSpanFor(spans, marker) {
+    if (spans) for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.marker == marker) return span;
+    }
+  }
+  // Remove a span from an array, returning undefined if no spans are
+  // left (we don't store arrays for lines without spans).
+  function removeMarkedSpan(spans, span) {
+    for (var r, i = 0; i < spans.length; ++i)
+      if (spans[i] != span) (r || (r = [])).push(spans[i]);
+    return r;
+  }
+  // Add a span to a line.
+  function addMarkedSpan(line, span) {
+    line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
+    span.marker.attachLine(line);
+  }
+
+  // Used for the algorithm that adjusts markers for a change in the
+  // document. These functions cut an array of spans at a given
+  // character position, returning an array of remaining chunks (or
+  // undefined if nothing remains).
+  function markedSpansBefore(old, startCh, isInsert) {
+    if (old) for (var i = 0, nw; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
+      if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+        var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
+        (nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
+      }
+    }
+    return nw;
+  }
+  function markedSpansAfter(old, endCh, isInsert) {
+    if (old) for (var i = 0, nw; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
+      if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+        var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
+        (nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
+                                              span.to == null ? null : span.to - endCh));
+      }
+    }
+    return nw;
+  }
+
+  // Given a change object, compute the new set of marker spans that
+  // cover the line in which the change took place. Removes spans
+  // entirely within the change, reconnects spans belonging to the
+  // same marker that appear on both sides of the change, and cuts off
+  // spans partially within the change. Returns an array of span
+  // arrays with one element for each line in (after) the change.
+  function stretchSpansOverChange(doc, change) {
+    if (change.full) return null;
+    var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
+    var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
+    if (!oldFirst && !oldLast) return null;
+
+    var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
+    // Get the spans that 'stick out' on both sides
+    var first = markedSpansBefore(oldFirst, startCh, isInsert);
+    var last = markedSpansAfter(oldLast, endCh, isInsert);
+
+    // Next, merge those two ends
+    var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
+    if (first) {
+      // Fix up .to properties of first
+      for (var i = 0; i < first.length; ++i) {
+        var span = first[i];
+        if (span.to == null) {
+          var found = getMarkedSpanFor(last, span.marker);
+          if (!found) span.to = startCh;
+          else if (sameLine) span.to = found.to == null ? null : found.to + offset;
+        }
+      }
+    }
+    if (last) {
+      // Fix up .from in last (or move them into first in case of sameLine)
+      for (var i = 0; i < last.length; ++i) {
+        var span = last[i];
+        if (span.to != null) span.to += offset;
+        if (span.from == null) {
+          var found = getMarkedSpanFor(first, span.marker);
+          if (!found) {
+            span.from = offset;
+            if (sameLine) (first || (first = [])).push(span);
+          }
+        } else {
+          span.from += offset;
+          if (sameLine) (first || (first = [])).push(span);
+        }
+      }
+    }
+    // Make sure we didn't create any zero-length spans
+    if (first) first = clearEmptySpans(first);
+    if (last && last != first) last = clearEmptySpans(last);
+
+    var newMarkers = [first];
+    if (!sameLine) {
+      // Fill gap with whole-line-spans
+      var gap = change.text.length - 2, gapMarkers;
+      if (gap > 0 && first)
+        for (var i = 0; i < first.length; ++i)
+          if (first[i].to == null)
+            (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i].marker, null, null));
+      for (var i = 0; i < gap; ++i)
+        newMarkers.push(gapMarkers);
+      newMarkers.push(last);
+    }
+    return newMarkers;
+  }
+
+  // Remove spans that are empty and don't have a clearWhenEmpty
+  // option of false.
+  function clearEmptySpans(spans) {
+    for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+        spans.splice(i--, 1);
+    }
+    if (!spans.length) return null;
+    return spans;
+  }
+
+  // Used for un/re-doing changes from the history. Combines the
+  // result of computing the existing spans with the set of spans that
+  // existed in the history (so that deleting around a span and then
+  // undoing brings back the span).
+  function mergeOldSpans(doc, change) {
+    var old = getOldSpans(doc, change);
+    var stretched = stretchSpansOverChange(doc, change);
+    if (!old) return stretched;
+    if (!stretched) return old;
+
+    for (var i = 0; i < old.length; ++i) {
+      var oldCur = old[i], stretchCur = stretched[i];
+      if (oldCur && stretchCur) {
+        spans: for (var j = 0; j < stretchCur.length; ++j) {
+          var span = stretchCur[j];
+          for (var k = 0; k < oldCur.length; ++k)
+            if (oldCur[k].marker == span.marker) continue spans;
+          oldCur.push(span);
+        }
+      } else if (stretchCur) {
+        old[i] = stretchCur;
+      }
+    }
+    return old;
+  }
+
+  // Used to 'clip' out readOnly ranges when making a change.
+  function removeReadOnlyRanges(doc, from, to) {
+    var markers = null;
+    doc.iter(from.line, to.line + 1, function(line) {
+      if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
+        var mark = line.markedSpans[i].marker;
+        if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+          (markers || (markers = [])).push(mark);
+      }
+    });
+    if (!markers) return null;
+    var parts = [{from: from, to: to}];
+    for (var i = 0; i < markers.length; ++i) {
+      var mk = markers[i], m = mk.find(0);
+      for (var j = 0; j < parts.length; ++j) {
+        var p = parts[j];
+        if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) continue;
+        var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
+        if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
+          newParts.push({from: p.from, to: m.from});
+        if (dto > 0 || !mk.inclusiveRight && !dto)
+          newParts.push({from: m.to, to: p.to});
+        parts.splice.apply(parts, newParts);
+        j += newParts.length - 1;
+      }
+    }
+    return parts;
+  }
+
+  // Connect or disconnect spans from a line.
+  function detachMarkedSpans(line) {
+    var spans = line.markedSpans;
+    if (!spans) return;
+    for (var i = 0; i < spans.length; ++i)
+      spans[i].marker.detachLine(line);
+    line.markedSpans = null;
+  }
+  function attachMarkedSpans(line, spans) {
+    if (!spans) return;
+    for (var i = 0; i < spans.length; ++i)
+      spans[i].marker.attachLine(line);
+    line.markedSpans = spans;
+  }
+
+  // Helpers used when computing which overlapping collapsed span
+  // counts as the larger one.
+  function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; }
+  function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; }
+
+  // Returns a number indicating which of two overlapping collapsed
+  // spans is larger (and thus includes the other). Falls back to
+  // comparing ids when the spans cover exactly the same range.
+  function compareCollapsedMarkers(a, b) {
+    var lenDiff = a.lines.length - b.lines.length;
+    if (lenDiff != 0) return lenDiff;
+    var aPos = a.find(), bPos = b.find();
+    var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
+    if (fromCmp) return -fromCmp;
+    var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
+    if (toCmp) return toCmp;
+    return b.id - a.id;
+  }
+
+  // Find out whether a line ends or starts in a collapsed span. If
+  // so, return the marker for that span.
+  function collapsedSpanAtSide(line, start) {
+    var sps = sawCollapsedSpans && line.markedSpans, found;
+    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+          (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+        found = sp.marker;
+    }
+    return found;
+  }
+  function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); }
+  function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); }
+
+  // Test whether there exists a collapsed span that partially
+  // overlaps (covers the start or end, but not both) of a new span.
+  // Such overlap is not allowed.
+  function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
+    var line = getLine(doc, lineNo);
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) for (var i = 0; i < sps.length; ++i) {
+      var sp = sps[i];
+      if (!sp.marker.collapsed) continue;
+      var found = sp.marker.find(0);
+      var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
+      var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
+      if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue;
+      if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
+          fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
+        return true;
+    }
+  }
+
+  // A visual line is a line as drawn on the screen. Folding, for
+  // example, can cause multiple logical lines to appear on the same
+  // visual line. This finds the start of the visual line that the
+  // given line is part of (usually that is the line itself).
+  function visualLine(line) {
+    var merged;
+    while (merged = collapsedSpanAtStart(line))
+      line = merged.find(-1, true).line;
+    return line;
+  }
+
+  // Returns an array of logical lines that continue the visual line
+  // started by the argument, or undefined if there are no such lines.
+  function visualLineContinued(line) {
+    var merged, lines;
+    while (merged = collapsedSpanAtEnd(line)) {
+      line = merged.find(1, true).line;
+      (lines || (lines = [])).push(line);
+    }
+    return lines;
+  }
+
+  // Get the line number of the start of the visual line that the
+  // given line number is part of.
+  function visualLineNo(doc, lineN) {
+    var line = getLine(doc, lineN), vis = visualLine(line);
+    if (line == vis) return lineN;
+    return lineNo(vis);
+  }
+  // Get the line number of the start of the next visual line after
+  // the given line.
+  function visualLineEndNo(doc, lineN) {
+    if (lineN > doc.lastLine()) return lineN;
+    var line = getLine(doc, lineN), merged;
+    if (!lineIsHidden(doc, line)) return lineN;
+    while (merged = collapsedSpanAtEnd(line))
+      line = merged.find(1, true).line;
+    return lineNo(line) + 1;
+  }
+
+  // Compute whether a line is hidden. Lines count as hidden when they
+  // are part of a visual line that starts with another line, or when
+  // they are entirely covered by collapsed, non-widget span.
+  function lineIsHidden(doc, line) {
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) for (var sp, i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (!sp.marker.collapsed) continue;
+      if (sp.from == null) return true;
+      if (sp.marker.widgetNode) continue;
+      if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+        return true;
+    }
+  }
+  function lineIsHiddenInner(doc, line, span) {
+    if (span.to == null) {
+      var end = span.marker.find(1, true);
+      return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker));
+    }
+    if (span.marker.inclusiveRight && span.to == line.text.length)
+      return true;
+    for (var sp, i = 0; i < line.markedSpans.length; ++i) {
+      sp = line.markedSpans[i];
+      if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
+          (sp.to == null || sp.to != span.from) &&
+          (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+          lineIsHiddenInner(doc, line, sp)) return true;
+    }
+  }
+
+  // LINE WIDGETS
+
+  // Line widgets are block elements displayed above or below a line.
+
+  var LineWidget = CodeMirror.LineWidget = function(doc, node, options) {
+    if (options) for (var opt in options) if (options.hasOwnProperty(opt))
+      this[opt] = options[opt];
+    this.doc = doc;
+    this.node = node;
+  };
+  eventMixin(LineWidget);
+
+  function adjustScrollWhenAboveVisible(cm, line, diff) {
+    if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+      addToScrollPos(cm, null, diff);
+  }
+
+  LineWidget.prototype.clear = function() {
+    var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
+    if (no == null || !ws) return;
+    for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
+    if (!ws.length) line.widgets = null;
+    var height = widgetHeight(this);
+    updateLineHeight(line, Math.max(0, line.height - height));
+    if (cm) runInOp(cm, function() {
+      adjustScrollWhenAboveVisible(cm, line, -height);
+      regLineChange(cm, no, "widget");
+    });
+  };
+  LineWidget.prototype.changed = function() {
+    var oldH = this.height, cm = this.doc.cm, line = this.line;
+    this.height = null;
+    var diff = widgetHeight(this) - oldH;
+    if (!diff) return;
+    updateLineHeight(line, line.height + diff);
+    if (cm) runInOp(cm, function() {
+      cm.curOp.forceUpdate = true;
+      adjustScrollWhenAboveVisible(cm, line, diff);
+    });
+  };
+
+  function widgetHeight(widget) {
+    if (widget.height != null) return widget.height;
+    var cm = widget.doc.cm;
+    if (!cm) return 0;
+    if (!contains(document.body, widget.node)) {
+      var parentStyle = "position: relative;";
+      if (widget.coverGutter)
+        parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;";
+      if (widget.noHScroll)
+        parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;";
+      removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
+    }
+    return widget.height = widget.node.parentNode.offsetHeight;
+  }
+
+  function addLineWidget(doc, handle, node, options) {
+    var widget = new LineWidget(doc, node, options);
+    var cm = doc.cm;
+    if (cm && widget.noHScroll) cm.display.alignWidgets = true;
+    changeLine(doc, handle, "widget", function(line) {
+      var widgets = line.widgets || (line.widgets = []);
+      if (widget.insertAt == null) widgets.push(widget);
+      else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget);
+      widget.line = line;
+      if (cm && !lineIsHidden(doc, line)) {
+        var aboveVisible = heightAtLine(line) < doc.scrollTop;
+        updateLineHeight(line, line.height + widgetHeight(widget));
+        if (aboveVisible) addToScrollPos(cm, null, widget.height);
+        cm.curOp.forceUpdate = true;
+      }
+      return true;
+    });
+    return widget;
+  }
+
+  // LINE DATA STRUCTURE
+
+  // Line objects. These hold state related to a line, including
+  // highlighting info (the styles array).
+  var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
+    this.text = text;
+    attachMarkedSpans(this, markedSpans);
+    this.height = estimateHeight ? estimateHeight(this) : 1;
+  };
+  eventMixin(Line);
+  Line.prototype.lineNo = function() { return lineNo(this); };
+
+  // Change the content (text, markers) of a line. Automatically
+  // invalidates cached information and tries to re-estimate the
+  // line's height.
+  function updateLine(line, text, markedSpans, estimateHeight) {
+    line.text = text;
+    if (line.stateAfter) line.stateAfter = null;
+    if (line.styles) line.styles = null;
+    if (line.order != null) line.order = null;
+    detachMarkedSpans(line);
+    attachMarkedSpans(line, markedSpans);
+    var estHeight = estimateHeight ? estimateHeight(line) : 1;
+    if (estHeight != line.height) updateLineHeight(line, estHeight);
+  }
+
+  // Detach a line from the document tree and its markers.
+  function cleanUpLine(line) {
+    line.parent = null;
+    detachMarkedSpans(line);
+  }
+
+  function extractLineClasses(type, output) {
+    if (type) for (;;) {
+      var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
+      if (!lineClass) break;
+      type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
+      var prop = lineClass[1] ? "bgClass" : "textClass";
+      if (output[prop] == null)
+        output[prop] = lineClass[2];
+      else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
+        output[prop] += " " + lineClass[2];
+    }
+    return type;
+  }
+
+  function callBlankLine(mode, state) {
+    if (mode.blankLine) return mode.blankLine(state);
+    if (!mode.innerMode) return;
+    var inner = CodeMirror.innerMode(mode, state);
+    if (inner.mode.blankLine) return inner.mode.blankLine(inner.state);
+  }
+
+  function readToken(mode, stream, state, inner) {
+    for (var i = 0; i < 10; i++) {
+      if (inner) inner[0] = CodeMirror.innerMode(mode, state).mode;
+      var style = mode.token(stream, state);
+      if (stream.pos > stream.start) return style;
+    }
+    throw new Error("Mode " + mode.name + " failed to advance stream.");
+  }
+
+  // Utility for getTokenAt and getLineTokens
+  function takeToken(cm, pos, precise, asArray) {
+    function getObj(copy) {
+      return {start: stream.start, end: stream.pos,
+              string: stream.current(),
+              type: style || null,
+              state: copy ? copyState(doc.mode, state) : state};
+    }
+
+    var doc = cm.doc, mode = doc.mode, style;
+    pos = clipPos(doc, pos);
+    var line = getLine(doc, pos.line), state = getStateBefore(cm, pos.line, precise);
+    var stream = new StringStream(line.text, cm.options.tabSize), tokens;
+    if (asArray) tokens = [];
+    while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
+      stream.start = stream.pos;
+      style = readToken(mode, stream, state);
+      if (asArray) tokens.push(getObj(true));
+    }
+    return asArray ? tokens : getObj();
+  }
+
+  // Run the given mode's parser over a line, calling f for each token.
+  function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) {
+    var flattenSpans = mode.flattenSpans;
+    if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
+    var curStart = 0, curStyle = null;
+    var stream = new StringStream(text, cm.options.tabSize), style;
+    var inner = cm.options.addModeClass && [null];
+    if (text == "") extractLineClasses(callBlankLine(mode, state), lineClasses);
+    while (!stream.eol()) {
+      if (stream.pos > cm.options.maxHighlightLength) {
+        flattenSpans = false;
+        if (forceToEnd) processLine(cm, text, state, stream.pos);
+        stream.pos = text.length;
+        style = null;
+      } else {
+        style = extractLineClasses(readToken(mode, stream, state, inner), lineClasses);
+      }
+      if (inner) {
+        var mName = inner[0].name;
+        if (mName) style = "m-" + (style ? mName + " " + style : mName);
+      }
+      if (!flattenSpans || curStyle != style) {
+        while (curStart < stream.start) {
+          curStart = Math.min(stream.start, curStart + 50000);
+          f(curStart, curStyle);
+        }
+        curStyle = style;
+      }
+      stream.start = stream.pos;
+    }
+    while (curStart < stream.pos) {
+      // Webkit seems to refuse to render text nodes longer than 57444 characters
+      var pos = Math.min(stream.pos, curStart + 50000);
+      f(pos, curStyle);
+      curStart = pos;
+    }
+  }
+
+  // Compute a style array (an array starting with a mode generation
+  // -- for invalidation -- followed by pairs of end positions and
+  // style strings), which is used to highlight the tokens on the
+  // line.
+  function highlightLine(cm, line, state, forceToEnd) {
+    // A styles array always starts with a number identifying the
+    // mode/overlays that it is based on (for easy invalidation).
+    var st = [cm.state.modeGen], lineClasses = {};
+    // Compute the base array of styles
+    runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
+      st.push(end, style);
+    }, lineClasses, forceToEnd);
+
+    // Run overlays, adjust style array.
+    for (var o = 0; o < cm.state.overlays.length; ++o) {
+      var overlay = cm.state.overlays[o], i = 1, at = 0;
+      runMode(cm, line.text, overlay.mode, true, function(end, style) {
+        var start = i;
+        // Ensure there's a token end at the current position, and that i points at it
+        while (at < end) {
+          var i_end = st[i];
+          if (i_end > end)
+            st.splice(i, 1, end, st[i+1], i_end);
+          i += 2;
+          at = Math.min(end, i_end);
+        }
+        if (!style) return;
+        if (overlay.opaque) {
+          st.splice(start, i - start, end, "cm-overlay " + style);
+          i = start + 2;
+        } else {
+          for (; start < i; start += 2) {
+            var cur = st[start+1];
+            st[start+1] = (cur ? cur + " " : "") + "cm-overlay " + style;
+          }
+        }
+      }, lineClasses);
+    }
+
+    return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null};
+  }
+
+  function getLineStyles(cm, line, updateFrontier) {
+    if (!line.styles || line.styles[0] != cm.state.modeGen) {
+      var state = getStateBefore(cm, lineNo(line));
+      var result = highlightLine(cm, line, line.text.length > cm.options.maxHighlightLength ? copyState(cm.doc.mode, state) : state);
+      line.stateAfter = state;
+      line.styles = result.styles;
+      if (result.classes) line.styleClasses = result.classes;
+      else if (line.styleClasses) line.styleClasses = null;
+      if (updateFrontier === cm.doc.frontier) cm.doc.frontier++;
+    }
+    return line.styles;
+  }
+
+  // Lightweight form of highlight -- proceed over this line and
+  // update state, but don't save a style array. Used for lines that
+  // aren't currently visible.
+  function processLine(cm, text, state, startAt) {
+    var mode = cm.doc.mode;
+    var stream = new StringStream(text, cm.options.tabSize);
+    stream.start = stream.pos = startAt || 0;
+    if (text == "") callBlankLine(mode, state);
+    while (!stream.eol()) {
+      readToken(mode, stream, state);
+      stream.start = stream.pos;
+    }
+  }
+
+  // Convert a style as returned by a mode (either null, or a string
+  // containing one or more styles) to a CSS style. This is cached,
+  // and also looks for line-wide styles.
+  var styleToClassCache = {}, styleToClassCacheWithMode = {};
+  function interpretTokenStyle(style, options) {
+    if (!style || /^\s*$/.test(style)) return null;
+    var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
+    return cache[style] ||
+      (cache[style] = style.replace(/\S+/g, "cm-$&"));
+  }
+
+  // Render the DOM representation of the text of a line. Also builds
+  // up a 'line map', which points at the DOM nodes that represent
+  // specific stretches of text, and is used by the measuring code.
+  // The returned object contains the DOM node, this map, and
+  // information about line-wide styles that were set by the mode.
+  function buildLineContent(cm, lineView) {
+    // The padding-right forces the element to have a 'border', which
+    // is needed on Webkit to be able to get line-level bounding
+    // rectangles for it (in measureChar).
+    var content = elt("span", null, null, webkit ? "padding-right: .1px" : null);
+    var builder = {pre: elt("pre", [content], "CodeMirror-line"), content: content,
+                   col: 0, pos: 0, cm: cm,
+                   splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")};
+    lineView.measure = {};
+
+    // Iterate over the logical lines that make up this visual line.
+    for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
+      var line = i ? lineView.rest[i - 1] : lineView.line, order;
+      builder.pos = 0;
+      builder.addToken = buildToken;
+      // Optionally wire in some hacks into the token-rendering
+      // algorithm, to deal with browser quirks.
+      if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line)))
+        builder.addToken = buildTokenBadBidi(builder.addToken, order);
+      builder.map = [];
+      var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
+      insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
+      if (line.styleClasses) {
+        if (line.styleClasses.bgClass)
+          builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "");
+        if (line.styleClasses.textClass)
+          builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "");
+      }
+
+      // Ensure at least a single node is present, for measuring.
+      if (builder.map.length == 0)
+        builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure)));
+
+      // Store the map and a cache object for the current logical line
+      if (i == 0) {
+        lineView.measure.map = builder.map;
+        lineView.measure.cache = {};
+      } else {
+        (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map);
+        (lineView.measure.caches || (lineView.measure.caches = [])).push({});
+      }
+    }
+
+    // See issue #2901
+    if (webkit) {
+      var last = builder.content.lastChild
+      if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
+        builder.content.className = "cm-tab-wrap-hack";
+    }
+
+    signal(cm, "renderLine", cm, lineView.line, builder.pre);
+    if (builder.pre.className)
+      builder.textClass = joinClasses(builder.pre.className, builder.textClass || "");
+
+    return builder;
+  }
+
+  function defaultSpecialCharPlaceholder(ch) {
+    var token = elt("span", "\u2022", "cm-invalidchar");
+    token.title = "\\u" + ch.charCodeAt(0).toString(16);
+    token.setAttribute("aria-label", token.title);
+    return token;
+  }
+
+  // Build up the DOM representation for a single token, and add it to
+  // the line map. Takes care to render special characters separately.
+  function buildToken(builder, text, style, startStyle, endStyle, title, css) {
+    if (!text) return;
+    var displayText = builder.splitSpaces ? text.replace(/ {3,}/g, splitSpaces) : text;
+    var special = builder.cm.state.specialChars, mustWrap = false;
+    if (!special.test(text)) {
+      builder.col += text.length;
+      var content = document.createTextNode(displayText);
+      builder.map.push(builder.pos, builder.pos + text.length, content);
+      if (ie && ie_version < 9) mustWrap = true;
+      builder.pos += text.length;
+    } else {
+      var content = document.createDocumentFragment(), pos = 0;
+      while (true) {
+        special.lastIndex = pos;
+        var m = special.exec(text);
+        var skipped = m ? m.index - pos : text.length - pos;
+        if (skipped) {
+          var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
+          if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
+          else content.appendChild(txt);
+          builder.map.push(builder.pos, builder.pos + skipped, txt);
+          builder.col += skipped;
+          builder.pos += skipped;
+        }
+        if (!m) break;
+        pos += skipped + 1;
+        if (m[0] == "\t") {
+          var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
+          var txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
+          txt.setAttribute("role", "presentation");
+          txt.setAttribute("cm-text", "\t");
+          builder.col += tabWidth;
+        } else if (m[0] == "\r" || m[0] == "\n") {
+          var txt = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
+          txt.setAttribute("cm-text", m[0]);
+          builder.col += 1;
+        } else {
+          var txt = builder.cm.options.specialCharPlaceholder(m[0]);
+          txt.setAttribute("cm-text", m[0]);
+          if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
+          else content.appendChild(txt);
+          builder.col += 1;
+        }
+        builder.map.push(builder.pos, builder.pos + 1, txt);
+        builder.pos++;
+      }
+    }
+    if (style || startStyle || endStyle || mustWrap || css) {
+      var fullStyle = style || "";
+      if (startStyle) fullStyle += startStyle;
+      if (endStyle) fullStyle += endStyle;
+      var token = elt("span", [content], fullStyle, css);
+      if (title) token.title = title;
+      return builder.content.appendChild(token);
+    }
+    builder.content.appendChild(content);
+  }
+
+  function splitSpaces(old) {
+    var out = " ";
+    for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
+    out += " ";
+    return out;
+  }
+
+  // Work around nonsense dimensions being reported for stretches of
+  // right-to-left text.
+  function buildTokenBadBidi(inner, order) {
+    return function(builder, text, style, startStyle, endStyle, title, css) {
+      style = style ? style + " cm-force-border" : "cm-force-border";
+      var start = builder.pos, end = start + text.length;
+      for (;;) {
+        // Find the part that overlaps with the start of this text
+        for (var i = 0; i < order.length; i++) {
+          var part = order[i];
+          if (part.to > start && part.from <= start) break;
+        }
+        if (part.to >= end) return inner(builder, text, style, startStyle, endStyle, title, css);
+        inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css);
+        startStyle = null;
+        text = text.slice(part.to - start);
+        start = part.to;
+      }
+    };
+  }
+
+  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+    var widget = !ignoreWidget && marker.widgetNode;
+    if (widget) builder.map.push(builder.pos, builder.pos + size, widget);
+    if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
+      if (!widget)
+        widget = builder.content.appendChild(document.createElement("span"));
+      widget.setAttribute("cm-marker", marker.id);
+    }
+    if (widget) {
+      builder.cm.display.input.setUneditable(widget);
+      builder.content.appendChild(widget);
+    }
+    builder.pos += size;
+  }
+
+  // Outputs a number of spans to make up a line, taking highlighting
+  // and marked text into account.
+  function insertLineContent(line, builder, styles) {
+    var spans = line.markedSpans, allText = line.text, at = 0;
+    if (!spans) {
+      for (var i = 1; i < styles.length; i+=2)
+        builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder.cm.options));
+      return;
+    }
+
+    var len = allText.length, pos = 0, i = 1, text = "", style, css;
+    var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
+    for (;;) {
+      if (nextChange == pos) { // Update current marker set
+        spanStyle = spanEndStyle = spanStartStyle = title = css = "";
+        collapsed = null; nextChange = Infinity;
+        var foundBookmarks = [], endStyles
+        for (var j = 0; j < spans.length; ++j) {
+          var sp = spans[j], m = sp.marker;
+          if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
+            foundBookmarks.push(m);
+          } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
+            if (sp.to != null && sp.to != pos && nextChange > sp.to) {
+              nextChange = sp.to;
+              spanEndStyle = "";
+            }
+            if (m.className) spanStyle += " " + m.className;
+            if (m.css) css = (css ? css + ";" : "") + m.css;
+            if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
+            if (m.endStyle && sp.to == nextChange) (endStyles || (endStyles = [])).push(m.endStyle, sp.to)
+            if (m.title && !title) title = m.title;
+            if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+              collapsed = sp;
+          } else if (sp.from > pos && nextChange > sp.from) {
+            nextChange = sp.from;
+          }
+        }
+        if (endStyles) for (var j = 0; j < endStyles.length; j += 2)
+          if (endStyles[j + 1] == nextChange) spanEndStyle += " " + endStyles[j]
+
+        if (!collapsed || collapsed.from == pos) for (var j = 0; j < foundBookmarks.length; ++j)
+          buildCollapsedSpan(builder, 0, foundBookmarks[j]);
+        if (collapsed && (collapsed.from || 0) == pos) {
+          buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
+                             collapsed.marker, collapsed.from == null);
+          if (collapsed.to == null) return;
+          if (collapsed.to == pos) collapsed = false;
+        }
+      }
+      if (pos >= len) break;
+
+      var upto = Math.min(len, nextChange);
+      while (true) {
+        if (text) {
+          var end = pos + text.length;
+          if (!collapsed) {
+            var tokenText = end > upto ? text.slice(0, upto - pos) : text;
+            builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+                             spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css);
+          }
+          if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
+          pos = end;
+          spanStartStyle = "";
+        }
+        text = allText.slice(at, at = styles[i++]);
+        style = interpretTokenStyle(styles[i++], builder.cm.options);
+      }
+    }
+  }
+
+  // DOCUMENT DATA STRUCTURE
+
+  // By default, updates that start and end at the beginning of a line
+  // are treated specially, in order to make the association of line
+  // widgets and marker elements with the text behave more intuitive.
+  function isWholeLineUpdate(doc, change) {
+    return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
+      (!doc.cm || doc.cm.options.wholeLineUpdateBefore);
+  }
+
+  // Perform a change on the document data structure.
+  function updateDoc(doc, change, markedSpans, estimateHeight) {
+    function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
+    function update(line, text, spans) {
+      updateLine(line, text, spans, estimateHeight);
+      signalLater(line, "change", line, change);
+    }
+    function linesFor(start, end) {
+      for (var i = start, result = []; i < end; ++i)
+        result.push(new Line(text[i], spansFor(i), estimateHeight));
+      return result;
+    }
+
+    var from = change.from, to = change.to, text = change.text;
+    var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
+    var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
+
+    // Adjust the line structure
+    if (change.full) {
+      doc.insert(0, linesFor(0, text.length));
+      doc.remove(text.length, doc.size - text.length);
+    } else if (isWholeLineUpdate(doc, change)) {
+      // This is a whole-line replace. Treated specially to make
+      // sure line objects move the way they are supposed to.
+      var added = linesFor(0, text.length - 1);
+      update(lastLine, lastLine.text, lastSpans);
+      if (nlines) doc.remove(from.line, nlines);
+      if (added.length) doc.insert(from.line, added);
+    } else if (firstLine == lastLine) {
+      if (text.length == 1) {
+        update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
+      } else {
+        var added = linesFor(1, text.length - 1);
+        added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
+        update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+        doc.insert(from.line + 1, added);
+      }
+    } else if (text.length == 1) {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
+      doc.remove(from.line + 1, nlines);
+    } else {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+      update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
+      var added = linesFor(1, text.length - 1);
+      if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
+      doc.insert(from.line + 1, added);
+    }
+
+    signalLater(doc, "change", doc, change);
+  }
+
+  // The document is represented as a BTree consisting of leaves, with
+  // chunk of lines in them, and branches, with up to ten leaves or
+  // other branch nodes below them. The top node is always a branch
+  // node, and is the document object itself (meaning it has
+  // additional methods and properties).
+  //
+  // All nodes have parent links. The tree is used both to go from
+  // line numbers to line objects, and to go from objects to numbers.
+  // It also indexes by height, and is used to convert between height
+  // and line object, and to find the total height of the document.
+  //
+  // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
+
+  function LeafChunk(lines) {
+    this.lines = lines;
+    this.parent = null;
+    for (var i = 0, height = 0; i < lines.length; ++i) {
+      lines[i].parent = this;
+      height += lines[i].height;
+    }
+    this.height = height;
+  }
+
+  LeafChunk.prototype = {
+    chunkSize: function() { return this.lines.length; },
+    // Remove the n lines at offset 'at'.
+    removeInner: function(at, n) {
+      for (var i = at, e = at + n; i < e; ++i) {
+        var line = this.lines[i];
+        this.height -= line.height;
+        cleanUpLine(line);
+        signalLater(line, "delete");
+      }
+      this.lines.splice(at, n);
+    },
+    // Helper used to collapse a small branch into a single leaf.
+    collapse: function(lines) {
+      lines.push.apply(lines, this.lines);
+    },
+    // Insert the given array of lines at offset 'at', count them as
+    // having the given height.
+    insertInner: function(at, lines, height) {
+      this.height += height;
+      this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
+      for (var i = 0; i < lines.length; ++i) lines[i].parent = this;
+    },
+    // Used to iterate over a part of the tree.
+    iterN: function(at, n, op) {
+      for (var e = at + n; at < e; ++at)
+        if (op(this.lines[at])) return true;
+    }
+  };
+
+  function BranchChunk(children) {
+    this.children = children;
+    var size = 0, height = 0;
+    for (var i = 0; i < children.length; ++i) {
+      var ch = children[i];
+      size += ch.chunkSize(); height += ch.height;
+      ch.parent = this;
+    }
+    this.size = size;
+    this.height = height;
+    this.parent = null;
+  }
+
+  BranchChunk.prototype = {
+    chunkSize: function() { return this.size; },
+    removeInner: function(at, n) {
+      this.size -= n;
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this.children[i], sz = child.chunkSize();
+        if (at < sz) {
+          var rm = Math.min(n, sz - at), oldHeight = child.height;
+          child.removeInner(at, rm);
+          this.height -= oldHeight - child.height;
+          if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
+          if ((n -= rm) == 0) break;
+          at = 0;
+        } else at -= sz;
+      }
+      // If the result is smaller than 25 lines, ensure that it is a
+      // single leaf node.
+      if (this.size - n < 25 &&
+          (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
+        var lines = [];
+        this.collapse(lines);
+        this.children = [new LeafChunk(lines)];
+        this.children[0].parent = this;
+      }
+    },
+    collapse: function(lines) {
+      for (var i = 0; i < this.children.length; ++i) this.children[i].collapse(lines);
+    },
+    insertInner: function(at, lines, height) {
+      this.size += lines.length;
+      this.height += height;
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this.children[i], sz = child.chunkSize();
+        if (at <= sz) {
+          child.insertInner(at, lines, height);
+          if (child.lines && child.lines.length > 50) {
+            // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
+            // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
+            var remaining = child.lines.length % 25 + 25
+            for (var pos = remaining; pos < child.lines.length;) {
+              var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
+              child.height -= leaf.height;
+              this.children.splice(++i, 0, leaf);
+              leaf.parent = this;
+            }
+            child.lines = child.lines.slice(0, remaining);
+            this.maybeSpill();
+          }
+          break;
+        }
+        at -= sz;
+      }
+    },
+    // When a node has grown, check whether it should be split.
+    maybeSpill: function() {
+      if (this.children.length <= 10) return;
+      var me = this;
+      do {
+        var spilled = me.children.splice(me.children.length - 5, 5);
+        var sibling = new BranchChunk(spilled);
+        if (!me.parent) { // Become the parent node
+          var copy = new BranchChunk(me.children);
+          copy.parent = me;
+          me.children = [copy, sibling];
+          me = copy;
+       } else {
+          me.size -= sibling.size;
+          me.height -= sibling.height;
+          var myIndex = indexOf(me.parent.children, me);
+          me.parent.children.splice(myIndex + 1, 0, sibling);
+        }
+        sibling.parent = me.parent;
+      } while (me.children.length > 10);
+      me.parent.maybeSpill();
+    },
+    iterN: function(at, n, op) {
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this.children[i], sz = child.chunkSize();
+        if (at < sz) {
+          var used = Math.min(n, sz - at);
+          if (child.iterN(at, used, op)) return true;
+          if ((n -= used) == 0) break;
+          at = 0;
+        } else at -= sz;
+      }
+    }
+  };
+
+  var nextDocId = 0;
+  var Doc = CodeMirror.Doc = function(text, mode, firstLine, lineSep) {
+    if (!(this instanceof Doc)) return new Doc(text, mode, firstLine, lineSep);
+    if (firstLine == null) firstLine = 0;
+
+    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
+    this.first = firstLine;
+    this.scrollTop = this.scrollLeft = 0;
+    this.cantEdit = false;
+    this.cleanGeneration = 1;
+    this.frontier = firstLine;
+    var start = Pos(firstLine, 0);
+    this.sel = simpleSelection(start);
+    this.history = new History(null);
+    this.id = ++nextDocId;
+    this.modeOption = mode;
+    this.lineSep = lineSep;
+    this.extend = false;
+
+    if (typeof text == "string") text = this.splitLines(text);
+    updateDoc(this, {from: start, to: start, text: text});
+    setSelection(this, simpleSelection(start), sel_dontScroll);
+  };
+
+  Doc.prototype = createObj(BranchChunk.prototype, {
+    constructor: Doc,
+    // Iterate over the document. Supports two forms -- with only one
+    // argument, it calls that for each line in the document. With
+    // three, it iterates over the range given by the first two (with
+    // the second being non-inclusive).
+    iter: function(from, to, op) {
+      if (op) this.iterN(from - this.first, to - from, op);
+      else this.iterN(this.first, this.first + this.size, from);
+    },
+
+    // Non-public interface for adding and removing lines.
+    insert: function(at, lines) {
+      var height = 0;
+      for (var i = 0; i < lines.length; ++i) height += lines[i].height;
+      this.insertInner(at - this.first, lines, height);
+    },
+    remove: function(at, n) { this.removeInner(at - this.first, n); },
+
+    // From here, the methods are part of the public interface. Most
+    // are also available from CodeMirror (editor) instances.
+
+    getValue: function(lineSep) {
+      var lines = getLines(this, this.first, this.first + this.size);
+      if (lineSep === false) return lines;
+      return lines.join(lineSep || this.lineSeparator());
+    },
+    setValue: docMethodOp(function(code) {
+      var top = Pos(this.first, 0), last = this.first + this.size - 1;
+      makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+                        text: this.splitLines(code), origin: "setValue", full: true}, true);
+      setSelection(this, simpleSelection(top));
+    }),
+    replaceRange: function(code, from, to, origin) {
+      from = clipPos(this, from);
+      to = to ? clipPos(this, to) : from;
+      replaceRange(this, code, from, to, origin);
+    },
+    getRange: function(from, to, lineSep) {
+      var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
+      if (lineSep === false) return lines;
+      return lines.join(lineSep || this.lineSeparator());
+    },
+
+    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
+
+    getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
+    getLineNumber: function(line) {return lineNo(line);},
+
+    getLineHandleVisualStart: function(line) {
+      if (typeof line == "number") line = getLine(this, line);
+      return visualLine(line);
+    },
+
+    lineCount: function() {return this.size;},
+    firstLine: function() {return this.first;},
+    lastLine: function() {return this.first + this.size - 1;},
+
+    clipPos: function(pos) {return clipPos(this, pos);},
+
+    getCursor: function(start) {
+      var range = this.sel.primary(), pos;
+      if (start == null || start == "head") pos = range.head;
+      else if (start == "anchor") pos = range.anchor;
+      else if (start == "end" || start == "to" || start === false) pos = range.to();
+      else pos = range.from();
+      return pos;
+    },
+    listSelections: function() { return this.sel.ranges; },
+    somethingSelected: function() {return this.sel.somethingSelected();},
+
+    setCursor: docMethodOp(function(line, ch, options) {
+      setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
+    }),
+    setSelection: docMethodOp(function(anchor, head, options) {
+      setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
+    }),
+    extendSelection: docMethodOp(function(head, other, options) {
+      extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
+    }),
+    extendSelections: docMethodOp(function(heads, options) {
+      extendSelections(this, clipPosArray(this, heads), options);
+    }),
+    extendSelectionsBy: docMethodOp(function(f, options) {
+      var heads = map(this.sel.ranges, f);
+      extendSelections(this, clipPosArray(this, heads), options);
+    }),
+    setSelections: docMethodOp(function(ranges, primary, options) {
+      if (!ranges.length) return;
+      for (var i = 0, out = []; i < ranges.length; i++)
+        out[i] = new Range(clipPos(this, ranges[i].anchor),
+                           clipPos(this, ranges[i].head));
+      if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIndex);
+      setSelection(this, normalizeSelection(out, primary), options);
+    }),
+    addSelection: docMethodOp(function(anchor, head, options) {
+      var ranges = this.sel.ranges.slice(0);
+      ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
+      setSelection(this, normalizeSelection(ranges, ranges.length - 1), options);
+    }),
+
+    getSelection: function(lineSep) {
+      var ranges = this.sel.ranges, lines;
+      for (var i = 0; i < ranges.length; i++) {
+        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
+        lines = lines ? lines.concat(sel) : sel;
+      }
+      if (lineSep === false) return lines;
+      else return lines.join(lineSep || this.lineSeparator());
+    },
+    getSelections: function(lineSep) {
+      var parts = [], ranges = this.sel.ranges;
+      for (var i = 0; i < ranges.length; i++) {
+        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
+        if (lineSep !== false) sel = sel.join(lineSep || this.lineSeparator());
+        parts[i] = sel;
+      }
+      return parts;
+    },
+    replaceSelection: function(code, collapse, origin) {
+      var dup = [];
+      for (var i = 0; i < this.sel.ranges.length; i++)
+        dup[i] = code;
+      this.replaceSelections(dup, collapse, origin || "+input");
+    },
+    replaceSelections: docMethodOp(function(code, collapse, origin) {
+      var changes = [], sel = this.sel;
+      for (var i = 0; i < sel.ranges.length; i++) {
+        var range = sel.ranges[i];
+        changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin};
+      }
+      var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
+      for (var i = changes.length - 1; i >= 0; i--)
+        makeChange(this, changes[i]);
+      if (newSel) setSelectionReplaceHistory(this, newSel);
+      else if (this.cm) ensureCursorVisible(this.cm);
+    }),
+    undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
+    redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
+    undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
+    redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
+
+    setExtending: function(val) {this.extend = val;},
+    getExtending: function() {return this.extend;},
+
+    historySize: function() {
+      var hist = this.history, done = 0, undone = 0;
+      for (var i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++done;
+      for (var i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) ++undone;
+      return {undo: done, redo: undone};
+    },
+    clearHistory: function() {this.history = new History(this.history.maxGeneration);},
+
+    markClean: function() {
+      this.cleanGeneration = this.changeGeneration(true);
+    },
+    changeGeneration: function(forceSplit) {
+      if (forceSplit)
+        this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null;
+      return this.history.generation;
+    },
+    isClean: function (gen) {
+      return this.history.generation == (gen || this.cleanGeneration);
+    },
+
+    getHistory: function() {
+      return {done: copyHistoryArray(this.history.done),
+              undone: copyHistoryArray(this.history.undone)};
+    },
+    setHistory: function(histData) {
+      var hist = this.history = new History(this.history.maxGeneration);
+      hist.done = copyHistoryArray(histData.done.slice(0), null, true);
+      hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
+    },
+
+    addLineClass: docMethodOp(function(handle, where, cls) {
+      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
+        var prop = where == "text" ? "textClass"
+                 : where == "background" ? "bgClass"
+                 : where == "gutter" ? "gutterClass" : "wrapClass";
+        if (!line[prop]) line[prop] = cls;
+        else if (classTest(cls).test(line[prop])) return false;
+        else line[prop] += " " + cls;
+        return true;
+      });
+    }),
+    removeLineClass: docMethodOp(function(handle, where, cls) {
+      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
+        var prop = where == "text" ? "textClass"
+                 : where == "background" ? "bgClass"
+                 : where == "gutter" ? "gutterClass" : "wrapClass";
+        var cur = line[prop];
+        if (!cur) return false;
+        else if (cls == null) line[prop] = null;
+        else {
+          var found = cur.match(classTest(cls));
+          if (!found) return false;
+          var end = found.index + found[0].length;
+          line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
+        }
+        return true;
+      });
+    }),
+
+    addLineWidget: docMethodOp(function(handle, node, options) {
+      return addLineWidget(this, handle, node, options);
+    }),
+    removeLineWidget: function(widget) { widget.clear(); },
+
+    markText: function(from, to, options) {
+      return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range");
+    },
+    setBookmark: function(pos, options) {
+      var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+                      insertLeft: options && options.insertLeft,
+                      clearWhenEmpty: false, shared: options && options.shared,
+                      handleMouseEvents: options && options.handleMouseEvents};
+      pos = clipPos(this, pos);
+      return markText(this, pos, pos, realOpts, "bookmark");
+    },
+    findMarksAt: function(pos) {
+      pos = clipPos(this, pos);
+      var markers = [], spans = getLine(this, pos.line).markedSpans;
+      if (spans) for (var i = 0; i < spans.length; ++i) {
+        var span = spans[i];
+        if ((span.from == null || span.from <= pos.ch) &&
+            (span.to == null || span.to >= pos.ch))
+          markers.push(span.marker.parent || span.marker);
+      }
+      return markers;
+    },
+    findMarks: function(from, to, filter) {
+      from = clipPos(this, from); to = clipPos(this, to);
+      var found = [], lineNo = from.line;
+      this.iter(from.line, to.line + 1, function(line) {
+        var spans = line.markedSpans;
+        if (spans) for (var i = 0; i < spans.length; i++) {
+          var span = spans[i];
+          if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
+                span.from == null && lineNo != from.line ||
+                span.from != null && lineNo == to.line && span.from >= to.ch) &&
+              (!filter || filter(span.marker)))
+            found.push(span.marker.parent || span.marker);
+        }
+        ++lineNo;
+      });
+      return found;
+    },
+    getAllMarks: function() {
+      var markers = [];
+      this.iter(function(line) {
+        var sps = line.markedSpans;
+        if (sps) for (var i = 0; i < sps.length; ++i)
+          if (sps[i].from != null) markers.push(sps[i].marker);
+      });
+      return markers;
+    },
+
+    posFromIndex: function(off) {
+      var ch, lineNo = this.first, sepSize = this.lineSeparator().length;
+      this.iter(function(line) {
+        var sz = line.text.length + sepSize;
+        if (sz > off) { ch = off; return true; }
+        off -= sz;
+        ++lineNo;
+      });
+      return clipPos(this, Pos(lineNo, ch));
+    },
+    indexFromPos: function (coords) {
+      coords = clipPos(this, coords);
+      var index = coords.ch;
+      if (coords.line < this.first || coords.ch < 0) return 0;
+      var sepSize = this.lineSeparator().length;
+      this.iter(this.first, coords.line, function (line) {
+        index += line.text.length + sepSize;
+      });
+      return index;
+    },
+
+    copy: function(copyHistory) {
+      var doc = new Doc(getLines(this, this.first, this.first + this.size),
+                        this.modeOption, this.first, this.lineSep);
+      doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
+      doc.sel = this.sel;
+      doc.extend = false;
+      if (copyHistory) {
+        doc.history.undoDepth = this.history.undoDepth;
+        doc.setHistory(this.getHistory());
+      }
+      return doc;
+    },
+
+    linkedDoc: function(options) {
+      if (!options) options = {};
+      var from = this.first, to = this.first + this.size;
+      if (options.from != null && options.from > from) from = options.from;
+      if (options.to != null && options.to < to) to = options.to;
+      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep);
+      if (options.sharedHist) copy.history = this.history;
+      (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
+      copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
+      copySharedMarkers(copy, findSharedMarkers(this));
+      return copy;
+    },
+    unlinkDoc: function(other) {
+      if (other instanceof CodeMirror) other = other.doc;
+      if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
+        var link = this.linked[i];
+        if (link.doc != other) continue;
+        this.linked.splice(i, 1);
+        other.unlinkDoc(this);
+        detachSharedMarkers(findSharedMarkers(this));
+        break;
+      }
+      // If the histories were shared, split them again
+      if (other.history == this.history) {
+        var splitIds = [other.id];
+        linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
+        other.history = new History(null);
+        other.history.done = copyHistoryArray(this.history.done, splitIds);
+        other.history.undone = copyHistoryArray(this.history.undone, splitIds);
+      }
+    },
+    iterLinkedDocs: function(f) {linkedDocs(this, f);},
+
+    getMode: function() {return this.mode;},
+    getEditor: function() {return this.cm;},
+
+    splitLines: function(str) {
+      if (this.lineSep) return str.split(this.lineSep);
+      return splitLinesAuto(str);
+    },
+    lineSeparator: function() { return this.lineSep || "\n"; }
+  });
+
+  // Public alias.
+  Doc.prototype.eachLine = Doc.prototype.iter;
+
+  // Set up methods on CodeMirror's prototype to redirect to the editor's document.
+  var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
+  for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+    CodeMirror.prototype[prop] = (function(method) {
+      return function() {return method.apply(this.doc, arguments);};
+    })(Doc.prototype[prop]);
+
+  eventMixin(Doc);
+
+  // Call f for all linked documents.
+  function linkedDocs(doc, f, sharedHistOnly) {
+    function propagate(doc, skip, sharedHist) {
+      if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
+        var rel = doc.linked[i];
+        if (rel.doc == skip) continue;
+        var shared = sharedHist && rel.sharedHist;
+        if (sharedHistOnly && !shared) continue;
+        f(rel.doc, shared);
+        propagate(rel.doc, doc, shared);
+      }
+    }
+    propagate(doc, null, true);
+  }
+
+  // Attach a document to an editor.
+  function attachDoc(cm, doc) {
+    if (doc.cm) throw new Error("This document is already in use.");
+    cm.doc = doc;
+    doc.cm = cm;
+    estimateLineHeights(cm);
+    loadMode(cm);
+    if (!cm.options.lineWrapping) findMaxLine(cm);
+    cm.options.mode = doc.modeOption;
+    regChange(cm);
+  }
+
+  // LINE UTILITIES
+
+  // Find the line object corresponding to the given line number.
+  function getLine(doc, n) {
+    n -= doc.first;
+    if (n < 0 || n >= doc.size) throw new Error("There is no line " + (n + doc.first) + " in the document.");
+    for (var chunk = doc; !chunk.lines;) {
+      for (var i = 0;; ++i) {
+        var child = chunk.children[i], sz = child.chunkSize();
+        if (n < sz) { chunk = child; break; }
+        n -= sz;
+      }
+    }
+    return chunk.lines[n];
+  }
+
+  // Get the part of a document between two positions, as an array of
+  // strings.
+  function getBetween(doc, start, end) {
+    var out = [], n = start.line;
+    doc.iter(start.line, end.line + 1, function(line) {
+      var text = line.text;
+      if (n == end.line) text = text.slice(0, end.ch);
+      if (n == start.line) text = text.slice(start.ch);
+      out.push(text);
+      ++n;
+    });
+    return out;
+  }
+  // Get the lines between from and to, as array of strings.
+  function getLines(doc, from, to) {
+    var out = [];
+    doc.iter(from, to, function(line) { out.push(line.text); });
+    return out;
+  }
+
+  // Update the height of a line, propagating the height change
+  // upwards to parent nodes.
+  function updateLineHeight(line, height) {
+    var diff = height - line.height;
+    if (diff) for (var n = line; n; n = n.parent) n.height += diff;
+  }
+
+  // Given a line object, find its line number by walking up through
+  // its parent links.
+  function lineNo(line) {
+    if (line.parent == null) return null;
+    var cur = line.parent, no = indexOf(cur.lines, line);
+    for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
+      for (var i = 0;; ++i) {
+        if (chunk.children[i] == cur) break;
+        no += chunk.children[i].chunkSize();
+      }
+    }
+    return no + cur.first;
+  }
+
+  // Find the line at the given vertical position, using the height
+  // information in the document tree.
+  function lineAtHeight(chunk, h) {
+    var n = chunk.first;
+    outer: do {
+      for (var i = 0; i < chunk.children.length; ++i) {
+        var child = chunk.children[i], ch = child.height;
+        if (h < ch) { chunk = child; continue outer; }
+        h -= ch;
+        n += child.chunkSize();
+      }
+      return n;
+    } while (!chunk.lines);
+    for (var i = 0; i < chunk.lines.length; ++i) {
+      var line = chunk.lines[i], lh = line.height;
+      if (h < lh) break;
+      h -= lh;
+    }
+    return n + i;
+  }
+
+
+  // Find the height above the given line.
+  function heightAtLine(lineObj) {
+    lineObj = visualLine(lineObj);
+
+    var h = 0, chunk = lineObj.parent;
+    for (var i = 0; i < chunk.lines.length; ++i) {
+      var line = chunk.lines[i];
+      if (line == lineObj) break;
+      else h += line.height;
+    }
+    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+      for (var i = 0; i < p.children.length; ++i) {
+        var cur = p.children[i];
+        if (cur == chunk) break;
+        else h += cur.height;
+      }
+    }
+    return h;
+  }
+
+  // Get the bidi ordering for the given line (and cache it). Returns
+  // false for lines that are fully left-to-right, and an array of
+  // BidiSpan objects otherwise.
+  function getOrder(line) {
+    var order = line.order;
+    if (order == null) order = line.order = bidiOrdering(line.text);
+    return order;
+  }
+
+  // HISTORY
+
+  function History(startGen) {
+    // Arrays of change events and selections. Doing something adds an
+    // event to done and clears undo. Undoing moves events from done
+    // to undone, redoing moves them in the other direction.
+    this.done = []; this.undone = [];
+    this.undoDepth = Infinity;
+    // Used to track when changes can be merged into a single undo
+    // event
+    this.lastModTime = this.lastSelTime = 0;
+    this.lastOp = this.lastSelOp = null;
+    this.lastOrigin = this.lastSelOrigin = null;
+    // Used by the isClean() method
+    this.generation = this.maxGeneration = startGen || 1;
+  }
+
+  // Create a history change event from an updateDoc-style change
+  // object.
+  function historyChangeFromChange(doc, change) {
+    var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
+    attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
+    linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true);
+    return histChange;
+  }
+
+  // Pop all selection events off the end of a history array. Stop at
+  // a change event.
+  function clearSelectionEvents(array) {
+    while (array.length) {
+      var last = lst(array);
+      if (last.ranges) array.pop();
+      else break;
+    }
+  }
+
+  // Find the top change event in the history. Pop off selection
+  // events that are in the way.
+  function lastChangeEvent(hist, force) {
+    if (force) {
+      clearSelectionEvents(hist.done);
+      return lst(hist.done);
+    } else if (hist.done.length && !lst(hist.done).ranges) {
+      return lst(hist.done);
+    } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
+      hist.done.pop();
+      return lst(hist.done);
+    }
+  }
+
+  // Register a change in the history. Merges changes that are within
+  // a single operation, ore are close together with an origin that
+  // allows merging (starting with "+") into a single event.
+  function addChangeToHistory(doc, change, selAfter, opId) {
+    var hist = doc.history;
+    hist.undone.length = 0;
+    var time = +new Date, cur;
+
+    if ((hist.lastOp == opId ||
+         hist.lastOrigin == change.origin && change.origin &&
+         ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
+          change.origin.charAt(0) == "*")) &&
+        (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
+      // Merge this change into the last event
+      var last = lst(cur.changes);
+      if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
+        // Optimized case for simple insertion -- don't want to add
+        // new changesets for every character typed
+        last.to = changeEnd(change);
+      } else {
+        // Add new sub-event
+        cur.changes.push(historyChangeFromChange(doc, change));
+      }
+    } else {
+      // Can not be merged, start a new event.
+      var before = lst(hist.done);
+      if (!before || !before.ranges)
+        pushSelectionToHistory(doc.sel, hist.done);
+      cur = {changes: [historyChangeFromChange(doc, change)],
+             generation: hist.generation};
+      hist.done.push(cur);
+      while (hist.done.length > hist.undoDepth) {
+        hist.done.shift();
+        if (!hist.done[0].ranges) hist.done.shift();
+      }
+    }
+    hist.done.push(selAfter);
+    hist.generation = ++hist.maxGeneration;
+    hist.lastModTime = hist.lastSelTime = time;
+    hist.lastOp = hist.lastSelOp = opId;
+    hist.lastOrigin = hist.lastSelOrigin = change.origin;
+
+    if (!last) signal(doc, "historyAdded");
+  }
+
+  function selectionEventCanBeMerged(doc, origin, prev, sel) {
+    var ch = origin.charAt(0);
+    return ch == "*" ||
+      ch == "+" &&
+      prev.ranges.length == sel.ranges.length &&
+      prev.somethingSelected() == sel.somethingSelected() &&
+      new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500);
+  }
+
+  // Called whenever the selection changes, sets the new selection as
+  // the pending selection in the history, and pushes the old pending
+  // selection into the 'done' array when it was significantly
+  // different (in number of selected ranges, emptiness, or time).
+  function addSelectionToHistory(doc, sel, opId, options) {
+    var hist = doc.history, origin = options && options.origin;
+
+    // A new event is started when the previous origin does not match
+    // the current, or the origins don't allow matching. Origins
+    // starting with * are always merged, those starting with + are
+    // merged when similar and close together in time.
+    if (opId == hist.lastSelOp ||
+        (origin && hist.lastSelOrigin == origin &&
+         (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
+          selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
+      hist.done[hist.done.length - 1] = sel;
+    else
+      pushSelectionToHistory(sel, hist.done);
+
+    hist.lastSelTime = +new Date;
+    hist.lastSelOrigin = origin;
+    hist.lastSelOp = opId;
+    if (options && options.clearRedo !== false)
+      clearSelectionEvents(hist.undone);
+  }
+
+  function pushSelectionToHistory(sel, dest) {
+    var top = lst(dest);
+    if (!(top && top.ranges && top.equals(sel)))
+      dest.push(sel);
+  }
+
+  // Used to store marked span information in the history.
+  function attachLocalSpans(doc, change, from, to) {
+    var existing = change["spans_" + doc.id], n = 0;
+    doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) {
+      if (line.markedSpans)
+        (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans;
+      ++n;
+    });
+  }
+
+  // When un/re-doing restores text containing marked spans, those
+  // that have been explicitly cleared should not be restored.
+  function removeClearedSpans(spans) {
+    if (!spans) return null;
+    for (var i = 0, out; i < spans.length; ++i) {
+      if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
+      else if (out) out.push(spans[i]);
+    }
+    return !out ? spans : out.length ? out : null;
+  }
+
+  // Retrieve and filter the old marked spans stored in a change event.
+  function getOldSpans(doc, change) {
+    var found = change["spans_" + doc.id];
+    if (!found) return null;
+    for (var i = 0, nw = []; i < change.text.length; ++i)
+      nw.push(removeClearedSpans(found[i]));
+    return nw;
+  }
+
+  // Used both to provide a JSON-safe object in .getHistory, and, when
+  // detaching a document, to split the history in two
+  function copyHistoryArray(events, newGroup, instantiateSel) {
+    for (var i = 0, copy = []; i < events.length; ++i) {
+      var event = events[i];
+      if (event.ranges) {
+        copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
+        continue;
+      }
+      var changes = event.changes, newChanges = [];
+      copy.push({changes: newChanges});
+      for (var j = 0; j < changes.length; ++j) {
+        var change = changes[j], m;
+        newChanges.push({from: change.from, to: change.to, text: change.text});
+        if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) {
+          if (indexOf(newGroup, Number(m[1])) > -1) {
+            lst(newChanges)[prop] = change[prop];
+            delete change[prop];
+          }
+        }
+      }
+    }
+    return copy;
+  }
+
+  // Rebasing/resetting history to deal with externally-sourced changes
+
+  function rebaseHistSelSingle(pos, from, to, diff) {
+    if (to < pos.line) {
+      pos.line += diff;
+    } else if (from < pos.line) {
+      pos.line = from;
+      pos.ch = 0;
+    }
+  }
+
+  // Tries to rebase an array of history events given a change in the
+  // document. If the change touches the same lines as the event, the
+  // event, and everything 'behind' it, is discarded. If the change is
+  // before the event, the event's positions are updated. Uses a
+  // copy-on-write scheme for the positions, to avoid having to
+  // reallocate them all on every rebase, but also avoid problems with
+  // shared position objects being unsafely updated.
+  function rebaseHistArray(array, from, to, diff) {
+    for (var i = 0; i < array.length; ++i) {
+      var sub = array[i], ok = true;
+      if (sub.ranges) {
+        if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
+        for (var j = 0; j < sub.ranges.length; j++) {
+          rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
+          rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
+        }
+        continue;
+      }
+      for (var j = 0; j < sub.changes.length; ++j) {
+        var cur = sub.changes[j];
+        if (to < cur.from.line) {
+          cur.from = Pos(cur.from.line + diff, cur.from.ch);
+          cur.to = Pos(cur.to.line + diff, cur.to.ch);
+        } else if (from <= cur.to.line) {
+          ok = false;
+          break;
+        }
+      }
+      if (!ok) {
+        array.splice(0, i + 1);
+        i = 0;
+      }
+    }
+  }
+
+  function rebaseHist(hist, change) {
+    var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
+    rebaseHistArray(hist.done, from, to, diff);
+    rebaseHistArray(hist.undone, from, to, diff);
+  }
+
+  // EVENT UTILITIES
+
+  // Due to the fact that we still support jurassic IE versions, some
+  // compatibility wrappers are needed.
+
+  var e_preventDefault = CodeMirror.e_preventDefault = function(e) {
+    if (e.preventDefault) e.preventDefault();
+    else e.returnValue = false;
+  };
+  var e_stopPropagation = CodeMirror.e_stopPropagation = function(e) {
+    if (e.stopPropagation) e.stopPropagation();
+    else e.cancelBubble = true;
+  };
+  function e_defaultPrevented(e) {
+    return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false;
+  }
+  var e_stop = CodeMirror.e_stop = function(e) {e_preventDefault(e); e_stopPropagation(e);};
+
+  function e_target(e) {return e.target || e.srcElement;}
+  function e_button(e) {
+    var b = e.which;
+    if (b == null) {
+      if (e.button & 1) b = 1;
+      else if (e.button & 2) b = 3;
+      else if (e.button & 4) b = 2;
+    }
+    if (mac && e.ctrlKey && b == 1) b = 3;
+    return b;
+  }
+
+  // EVENT HANDLING
+
+  // Lightweight event framework. on/off also work on DOM nodes,
+  // registering native DOM handlers.
+
+  var on = CodeMirror.on = function(emitter, type, f) {
+    if (emitter.addEventListener)
+      emitter.addEventListener(type, f, false);
+    else if (emitter.attachEvent)
+      emitter.attachEvent("on" + type, f);
+    else {
+      var map = emitter._handlers || (emitter._handlers = {});
+      var arr = map[type] || (map[type] = []);
+      arr.push(f);
+    }
+  };
+
+  var noHandlers = []
+  function getHandlers(emitter, type, copy) {
+    var arr = emitter._handlers && emitter._handlers[type]
+    if (copy) return arr && arr.length > 0 ? arr.slice() : noHandlers
+    else return arr || noHandlers
+  }
+
+  var off = CodeMirror.off = function(emitter, type, f) {
+    if (emitter.removeEventListener)
+      emitter.removeEventListener(type, f, false);
+    else if (emitter.detachEvent)
+      emitter.detachEvent("on" + type, f);
+    else {
+      var handlers = getHandlers(emitter, type, false)
+      for (var i = 0; i < handlers.length; ++i)
+        if (handlers[i] == f) { handlers.splice(i, 1); break; }
+    }
+  };
+
+  var signal = CodeMirror.signal = function(emitter, type /*, values...*/) {
+    var handlers = getHandlers(emitter, type, true)
+    if (!handlers.length) return;
+    var args = Array.prototype.slice.call(arguments, 2);
+    for (var i = 0; i < handlers.length; ++i) handlers[i].apply(null, args);
+  };
+
+  var orphanDelayedCallbacks = null;
+
+  // Often, we want to signal events at a point where we are in the
+  // middle of some work, but don't want the handler to start calling
+  // other methods on the editor, which might be in an inconsistent
+  // state or simply not expect any other events to happen.
+  // signalLater looks whether there are any handlers, and schedules
+  // them to be executed when the last operation ends, or, if no
+  // operation is active, when a timeout fires.
+  function signalLater(emitter, type /*, values...*/) {
+    var arr = getHandlers(emitter, type, false)
+    if (!arr.length) return;
+    var args = Array.prototype.slice.call(arguments, 2), list;
+    if (operationGroup) {
+      list = operationGroup.delayedCallbacks;
+    } else if (orphanDelayedCallbacks) {
+      list = orphanDelayedCallbacks;
+    } else {
+      list = orphanDelayedCallbacks = [];
+      setTimeout(fireOrphanDelayed, 0);
+    }
+    function bnd(f) {return function(){f.apply(null, args);};};
+    for (var i = 0; i < arr.length; ++i)
+      list.push(bnd(arr[i]));
+  }
+
+  function fireOrphanDelayed() {
+    var delayed = orphanDelayedCallbacks;
+    orphanDelayedCallbacks = null;
+    for (var i = 0; i < delayed.length; ++i) delayed[i]();
+  }
+
+  // The DOM events that CodeMirror handles can be overridden by
+  // registering a (non-DOM) handler on the editor for the event name,
+  // and preventDefault-ing the event in that handler.
+  function signalDOMEvent(cm, e, override) {
+    if (typeof e == "string")
+      e = {type: e, preventDefault: function() { this.defaultPrevented = true; }};
+    signal(cm, override || e.type, cm, e);
+    return e_defaultPrevented(e) || e.codemirrorIgnore;
+  }
+
+  function signalCursorActivity(cm) {
+    var arr = cm._handlers && cm._handlers.cursorActivity;
+    if (!arr) return;
+    var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
+    for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1)
+      set.push(arr[i]);
+  }
+
+  function hasHandler(emitter, type) {
+    return getHandlers(emitter, type).length > 0
+  }
+
+  // Add on and off methods to a constructor's prototype, to make
+  // registering events on such objects more convenient.
+  function eventMixin(ctor) {
+    ctor.prototype.on = function(type, f) {on(this, type, f);};
+    ctor.prototype.off = function(type, f) {off(this, type, f);};
+  }
+
+  // MISC UTILITIES
+
+  // Number of pixels added to scroller and sizer to hide scrollbar
+  var scrollerGap = 30;
+
+  // Returned or thrown by various protocols to signal 'I'm not
+  // handling this'.
+  var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
+
+  // Reused option objects for setSelection & friends
+  var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};
+
+  function Delayed() {this.id = null;}
+  Delayed.prototype.set = function(ms, f) {
+    clearTimeout(this.id);
+    this.id = setTimeout(f, ms);
+  };
+
+  // Counts the column offset in a string, taking tabs into account.
+  // Used mostly to find indentation.
+  var countColumn = CodeMirror.countColumn = function(string, end, tabSize, startIndex, startValue) {
+    if (end == null) {
+      end = string.search(/[^\s\u00a0]/);
+      if (end == -1) end = string.length;
+    }
+    for (var i = startIndex || 0, n = startValue || 0;;) {
+      var nextTab = string.indexOf("\t", i);
+      if (nextTab < 0 || nextTab >= end)
+        return n + (end - i);
+      n += nextTab - i;
+      n += tabSize - (n % tabSize);
+      i = nextTab + 1;
+    }
+  };
+
+  // The inverse of countColumn -- find the offset that corresponds to
+  // a particular column.
+  var findColumn = CodeMirror.findColumn = function(string, goal, tabSize) {
+    for (var pos = 0, col = 0;;) {
+      var nextTab = string.indexOf("\t", pos);
+      if (nextTab == -1) nextTab = string.length;
+      var skipped = nextTab - pos;
+      if (nextTab == string.length || col + skipped >= goal)
+        return pos + Math.min(skipped, goal - col);
+      col += nextTab - pos;
+      col += tabSize - (col % tabSize);
+      pos = nextTab + 1;
+      if (col >= goal) return pos;
+    }
+  }
+
+  var spaceStrs = [""];
+  function spaceStr(n) {
+    while (spaceStrs.length <= n)
+      spaceStrs.push(lst(spaceStrs) + " ");
+    return spaceStrs[n];
+  }
+
+  function lst(arr) { return arr[arr.length-1]; }
+
+  var selectInput = function(node) { node.select(); };
+  if (ios) // Mobile Safari apparently has a bug where select() is broken.
+    selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; };
+  else if (ie) // Suppress mysterious IE10 errors
+    selectInput = function(node) { try { node.select(); } catch(_e) {} };
+
+  function indexOf(array, elt) {
+    for (var i = 0; i < array.length; ++i)
+      if (array[i] == elt) return i;
+    return -1;
+  }
+  function map(array, f) {
+    var out = [];
+    for (var i = 0; i < array.length; i++) out[i] = f(array[i], i);
+    return out;
+  }
+
+  function nothing() {}
+
+  function createObj(base, props) {
+    var inst;
+    if (Object.create) {
+      inst = Object.create(base);
+    } else {
+      nothing.prototype = base;
+      inst = new nothing();
+    }
+    if (props) copyObj(props, inst);
+    return inst;
+  };
+
+  function copyObj(obj, target, overwrite) {
+    if (!target) target = {};
+    for (var prop in obj)
+      if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+        target[prop] = obj[prop];
+    return target;
+  }
+
+  function bind(f) {
+    var args = Array.prototype.slice.call(arguments, 1);
+    return function(){return f.apply(null, args);};
+  }
+
+  var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
+  var isWordCharBasic = CodeMirror.isWordChar = function(ch) {
+    return /\w/.test(ch) || ch > "\x80" &&
+      (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
+  };
+  function isWordChar(ch, helper) {
+    if (!helper) return isWordCharBasic(ch);
+    if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) return true;
+    return helper.test(ch);
+  }
+
+  function isEmpty(obj) {
+    for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
+    return true;
+  }
+
+  // Extending unicode characters. A series of a non-extending char +
+  // any number of extending chars is treated as a single unit as far
+  // as editing and measuring is concerned. This is not fully correct,
+  // since some scripts/fonts/browsers also treat other configurations
+  // of code points as a group.
+  var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
+  function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); }
+
+  // DOM UTILITIES
+
+  function elt(tag, content, className, style) {
+    var e = document.createElement(tag);
+    if (className) e.className = className;
+    if (style) e.style.cssText = style;
+    if (typeof content == "string") e.appendChild(document.createTextNode(content));
+    else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
+    return e;
+  }
+
+  var range;
+  if (document.createRange) range = function(node, start, end, endNode) {
+    var r = document.createRange();
+    r.setEnd(endNode || node, end);
+    r.setStart(node, start);
+    return r;
+  };
+  else range = function(node, start, end) {
+    var r = document.body.createTextRange();
+    try { r.moveToElementText(node.parentNode); }
+    catch(e) { return r; }
+    r.collapse(true);
+    r.moveEnd("character", end);
+    r.moveStart("character", start);
+    return r;
+  };
+
+  function removeChildren(e) {
+    for (var count = e.childNodes.length; count > 0; --count)
+      e.removeChild(e.firstChild);
+    return e;
+  }
+
+  function removeChildrenAndAdd(parent, e) {
+    return removeChildren(parent).appendChild(e);
+  }
+
+  var contains = CodeMirror.contains = function(parent, child) {
+    if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+      child = child.parentNode;
+    if (parent.contains)
+      return parent.contains(child);
+    do {
+      if (child.nodeType == 11) child = child.host;
+      if (child == parent) return true;
+    } while (child = child.parentNode);
+  };
+
+  function activeElt() {
+    var activeElement = document.activeElement;
+    while (activeElement && activeElement.root && activeElement.root.activeElement)
+      activeElement = activeElement.root.activeElement;
+    return activeElement;
+  }
+  // Older versions of IE throws unspecified error when touching
+  // document.activeElement in some cases (during loading, in iframe)
+  if (ie && ie_version < 11) activeElt = function() {
+    try { return document.activeElement; }
+    catch(e) { return document.body; }
+  };
+
+  function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*"); }
+  var rmClass = CodeMirror.rmClass = function(node, cls) {
+    var current = node.className;
+    var match = classTest(cls).exec(current);
+    if (match) {
+      var after = current.slice(match.index + match[0].length);
+      node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
+    }
+  };
+  var addClass = CodeMirror.addClass = function(node, cls) {
+    var current = node.className;
+    if (!classTest(cls).test(current)) node.className += (current ? " " : "") + cls;
+  };
+  function joinClasses(a, b) {
+    var as = a.split(" ");
+    for (var i = 0; i < as.length; i++)
+      if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i];
+    return b;
+  }
+
+  // WINDOW-WIDE EVENTS
+
+  // These must be handled carefully, because naively registering a
+  // handler for each editor will cause the editors to never be
+  // garbage collected.
+
+  function forEachCodeMirror(f) {
+    if (!document.body.getElementsByClassName) return;
+    var byClass = document.body.getElementsByClassName("CodeMirror");
+    for (var i = 0; i < byClass.length; i++) {
+      var cm = byClass[i].CodeMirror;
+      if (cm) f(cm);
+    }
+  }
+
+  var globalsRegistered = false;
+  function ensureGlobalHandlers() {
+    if (globalsRegistered) return;
+    registerGlobalHandlers();
+    globalsRegistered = true;
+  }
+  function registerGlobalHandlers() {
+    // When the window resizes, we need to refresh active editors.
+    var resizeTimer;
+    on(window, "resize", function() {
+      if (resizeTimer == null) resizeTimer = setTimeout(function() {
+        resizeTimer = null;
+        forEachCodeMirror(onResize);
+      }, 100);
+    });
+    // When the window loses focus, we want to show the editor as blurred
+    on(window, "blur", function() {
+      forEachCodeMirror(onBlur);
+    });
+  }
+
+  // FEATURE DETECTION
+
+  // Detect drag-and-drop
+  var dragAndDrop = function() {
+    // There is *some* kind of drag-and-drop support in IE6-8, but I
+    // couldn't get it to work yet.
+    if (ie && ie_version < 9) return false;
+    var div = elt('div');
+    return "draggable" in div || "dragDrop" in div;
+  }();
+
+  var zwspSupported;
+  function zeroWidthElement(measure) {
+    if (zwspSupported == null) {
+      var test = elt("span", "\u200b");
+      removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
+      if (measure.firstChild.offsetHeight != 0)
+        zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8);
+    }
+    var node = zwspSupported ? elt("span", "\u200b") :
+      elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
+    node.setAttribute("cm-text", "");
+    return node;
+  }
+
+  // Feature-detect IE's crummy client rect reporting for bidi text
+  var badBidiRects;
+  function hasBadBidiRects(measure) {
+    if (badBidiRects != null) return badBidiRects;
+    var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
+    var r0 = range(txt, 0, 1).getBoundingClientRect();
+    if (!r0 || r0.left == r0.right) return false; // Safari returns null in some cases (#2780)
+    var r1 = range(txt, 1, 2).getBoundingClientRect();
+    return badBidiRects = (r1.right - r0.right < 3);
+  }
+
+  // See if "".split is the broken IE version, if so, provide an
+  // alternative way to split lines.
+  var splitLinesAuto = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
+    var pos = 0, result = [], l = string.length;
+    while (pos <= l) {
+      var nl = string.indexOf("\n", pos);
+      if (nl == -1) nl = string.length;
+      var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
+      var rt = line.indexOf("\r");
+      if (rt != -1) {
+        result.push(line.slice(0, rt));
+        pos += rt + 1;
+      } else {
+        result.push(line);
+        pos = nl + 1;
+      }
+    }
+    return result;
+  } : function(string){return string.split(/\r\n?|\n/);};
+
+  var hasSelection = window.getSelection ? function(te) {
+    try { return te.selectionStart != te.selectionEnd; }
+    catch(e) { return false; }
+  } : function(te) {
+    try {var range = te.ownerDocument.selection.createRange();}
+    catch(e) {}
+    if (!range || range.parentElement() != te) return false;
+    return range.compareEndPoints("StartToEnd", range) != 0;
+  };
+
+  var hasCopyEvent = (function() {
+    var e = elt("div");
+    if ("oncopy" in e) return true;
+    e.setAttribute("oncopy", "return;");
+    return typeof e.oncopy == "function";
+  })();
+
+  var badZoomedRects = null;
+  function hasBadZoomedRects(measure) {
+    if (badZoomedRects != null) return badZoomedRects;
+    var node = removeChildrenAndAdd(measure, elt("span", "x"));
+    var normal = node.getBoundingClientRect();
+    var fromRange = range(node, 0, 1).getBoundingClientRect();
+    return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1;
+  }
+
+  // KEY NAMES
+
+  var keyNames = CodeMirror.keyNames = {
+    3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+    19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+    36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+    46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+    106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
+    173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+    221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+    63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+  };
+  (function() {
+    // Number keys
+    for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i);
+    // Alphabetic keys
+    for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
+    // Function keys
+    for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
+  })();
+
+  // BIDI HELPERS
+
+  function iterateBidiSections(order, from, to, f) {
+    if (!order) return f(from, to, "ltr");
+    var found = false;
+    for (var i = 0; i < order.length; ++i) {
+      var part = order[i];
+      if (part.from < to && part.to > from || from == to && part.to == from) {
+        f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
+        found = true;
+      }
+    }
+    if (!found) f(from, to, "ltr");
+  }
+
+  function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
+  function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
+
+  function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
+  function lineRight(line) {
+    var order = getOrder(line);
+    if (!order) return line.text.length;
+    return bidiRight(lst(order));
+  }
+
+  function lineStart(cm, lineN) {
+    var line = getLine(cm.doc, lineN);
+    var visual = visualLine(line);
+    if (visual != line) lineN = lineNo(visual);
+    var order = getOrder(visual);
+    var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
+    return Pos(lineN, ch);
+  }
+  function lineEnd(cm, lineN) {
+    var merged, line = getLine(cm.doc, lineN);
+    while (merged = collapsedSpanAtEnd(line)) {
+      line = merged.find(1, true).line;
+      lineN = null;
+    }
+    var order = getOrder(line);
+    var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
+    return Pos(lineN == null ? lineNo(line) : lineN, ch);
+  }
+  function lineStartSmart(cm, pos) {
+    var start = lineStart(cm, pos.line);
+    var line = getLine(cm.doc, start.line);
+    var order = getOrder(line);
+    if (!order || order[0].level == 0) {
+      var firstNonWS = Math.max(0, line.text.search(/\S/));
+      var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
+      return Pos(start.line, inWS ? 0 : firstNonWS);
+    }
+    return start;
+  }
+
+  function compareBidiLevel(order, a, b) {
+    var linedir = order[0].level;
+    if (a == linedir) return true;
+    if (b == linedir) return false;
+    return a < b;
+  }
+  var bidiOther;
+  function getBidiPartAt(order, pos) {
+    bidiOther = null;
+    for (var i = 0, found; i < order.length; ++i) {
+      var cur = order[i];
+      if (cur.from < pos && cur.to > pos) return i;
+      if ((cur.from == pos || cur.to == pos)) {
+        if (found == null) {
+          found = i;
+        } else if (compareBidiLevel(order, cur.level, order[found].level)) {
+          if (cur.from != cur.to) bidiOther = found;
+          return i;
+        } else {
+          if (cur.from != cur.to) bidiOther = i;
+          return found;
+        }
+      }
+    }
+    return found;
+  }
+
+  function moveInLine(line, pos, dir, byUnit) {
+    if (!byUnit) return pos + dir;
+    do pos += dir;
+    while (pos > 0 && isExtendingChar(line.text.charAt(pos)));
+    return pos;
+  }
+
+  // This is needed in order to move 'visually' through bi-directional
+  // text -- i.e., pressing left should make the cursor go left, even
+  // when in RTL text. The tricky part is the 'jumps', where RTL and
+  // LTR text touch each other. This often requires the cursor offset
+  // to move more than one unit, in order to visually move one unit.
+  function moveVisually(line, start, dir, byUnit) {
+    var bidi = getOrder(line);
+    if (!bidi) return moveLogically(line, start, dir, byUnit);
+    var pos = getBidiPartAt(bidi, start), part = bidi[pos];
+    var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
+
+    for (;;) {
+      if (target > part.from && target < part.to) return target;
+      if (target == part.from || target == part.to) {
+        if (getBidiPartAt(bidi, target) == pos) return target;
+        part = bidi[pos += dir];
+        return (dir > 0) == part.level % 2 ? part.to : part.from;
+      } else {
+        part = bidi[pos += dir];
+        if (!part) return null;
+        if ((dir > 0) == part.level % 2)
+          target = moveInLine(line, part.to, -1, byUnit);
+        else
+          target = moveInLine(line, part.from, 1, byUnit);
+      }
+    }
+  }
+
+  function moveLogically(line, start, dir, byUnit) {
+    var target = start + dir;
+    if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir;
+    return target < 0 || target > line.text.length ? null : target;
+  }
+
+  // Bidirectional ordering algorithm
+  // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+  // that this (partially) implements.
+
+  // One-char codes used for character types:
+  // L (L):   Left-to-Right
+  // R (R):   Right-to-Left
+  // r (AL):  Right-to-Left Arabic
+  // 1 (EN):  European Number
+  // + (ES):  European Number Separator
+  // % (ET):  European Number Terminator
+  // n (AN):  Arabic Number
+  // , (CS):  Common Number Separator
+  // m (NSM): Non-Spacing Mark
+  // b (BN):  Boundary Neutral
+  // s (B):   Paragraph Separator
+  // t (S):   Segment Separator
+  // w (WS):  Whitespace
+  // N (ON):  Other Neutrals
+
+  // Returns null if characters are ordered as they appear
+  // (left-to-right), or an array of sections ({from, to, level}
+  // objects) in the order in which they occur visually.
+  var bidiOrdering = (function() {
+    // Character types for codepoints 0 to 0xff
+    var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
+    // Character types for codepoints 0x600 to 0x6ff
+    var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmm";
+    function charType(code) {
+      if (code <= 0xf7) return lowTypes.charAt(code);
+      else if (0x590 <= code && code <= 0x5f4) return "R";
+      else if (0x600 <= code && code <= 0x6ed) return arabicTypes.charAt(code - 0x600);
+      else if (0x6ee <= code && code <= 0x8ac) return "r";
+      else if (0x2000 <= code && code <= 0x200b) return "w";
+      else if (code == 0x200c) return "b";
+      else return "L";
+    }
+
+    var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
+    var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
+    // Browsers seem to always treat the boundaries of block elements as being L.
+    var outerType = "L";
+
+    function BidiSpan(level, from, to) {
+      this.level = level;
+      this.from = from; this.to = to;
+    }
+
+    return function(str) {
+      if (!bidiRE.test(str)) return false;
+      var len = str.length, types = [];
+      for (var i = 0, type; i < len; ++i)
+        types.push(type = charType(str.charCodeAt(i)));
+
+      // W1. Examine each non-spacing mark (NSM) in the level run, and
+      // change the type of the NSM to the type of the previous
+      // character. If the NSM is at the start of the level run, it will
+      // get the type of sor.
+      for (var i = 0, prev = outerType; i < len; ++i) {
+        var type = types[i];
+        if (type == "m") types[i] = prev;
+        else prev = type;
+      }
+
+      // W2. Search backwards from each instance of a European number
+      // until the first strong type (R, L, AL, or sor) is found. If an
+      // AL is found, change the type of the European number to Arabic
+      // number.
+      // W3. Change all ALs to R.
+      for (var i = 0, cur = outerType; i < len; ++i) {
+        var type = types[i];
+        if (type == "1" && cur == "r") types[i] = "n";
+        else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
+      }
+
+      // W4. A single European separator between two European numbers
+      // changes to a European number. A single common separator between
+      // two numbers of the same type changes to that type.
+      for (var i = 1, prev = types[0]; i < len - 1; ++i) {
+        var type = types[i];
+        if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
+        else if (type == "," && prev == types[i+1] &&
+                 (prev == "1" || prev == "n")) types[i] = prev;
+        prev = type;
+      }
+
+      // W5. A sequence of European terminators adjacent to European
+      // numbers changes to all European numbers.
+      // W6. Otherwise, separators and terminators change to Other
+      // Neutral.
+      for (var i = 0; i < len; ++i) {
+        var type = types[i];
+        if (type == ",") types[i] = "N";
+        else if (type == "%") {
+          for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
+          var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
+          for (var j = i; j < end; ++j) types[j] = replace;
+          i = end - 1;
+        }
+      }
+
+      // W7. Search backwards from each instance of a European number
+      // until the first strong type (R, L, or sor) is found. If an L is
+      // found, then change the type of the European number to L.
+      for (var i = 0, cur = outerType; i < len; ++i) {
+        var type = types[i];
+        if (cur == "L" && type == "1") types[i] = "L";
+        else if (isStrong.test(type)) cur = type;
+      }
+
+      // N1. A sequence of neutrals takes the direction of the
+      // surrounding strong text if the text on both sides has the same
+      // direction. European and Arabic numbers act as if they were R in
+      // terms of their influence on neutrals. Start-of-level-run (sor)
+      // and end-of-level-run (eor) are used at level run boundaries.
+      // N2. Any remaining neutrals take the embedding direction.
+      for (var i = 0; i < len; ++i) {
+        if (isNeutral.test(types[i])) {
+          for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
+          var before = (i ? types[i-1] : outerType) == "L";
+          var after = (end < len ? types[end] : outerType) == "L";
+          var replace = before || after ? "L" : "R";
+          for (var j = i; j < end; ++j) types[j] = replace;
+          i = end - 1;
+        }
+      }
+
+      // Here we depart from the documented algorithm, in order to avoid
+      // building up an actual levels array. Since there are only three
+      // levels (0, 1, 2) in an implementation that doesn't take
+      // explicit embedding into account, we can build up the order on
+      // the fly, without following the level-based algorithm.
+      var order = [], m;
+      for (var i = 0; i < len;) {
+        if (countsAsLeft.test(types[i])) {
+          var start = i;
+          for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
+          order.push(new BidiSpan(0, start, i));
+        } else {
+          var pos = i, at = order.length;
+          for (++i; i < len && types[i] != "L"; ++i) {}
+          for (var j = pos; j < i;) {
+            if (countsAsNum.test(types[j])) {
+              if (pos < j) order.splice(at, 0, new BidiSpan(1, pos, j));
+              var nstart = j;
+              for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
+              order.splice(at, 0, new BidiSpan(2, nstart, j));
+              pos = j;
+            } else ++j;
+          }
+          if (pos < i) order.splice(at, 0, new BidiSpan(1, pos, i));
+        }
+      }
+      if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+        order[0].from = m[0].length;
+        order.unshift(new BidiSpan(0, 0, m[0].length));
+      }
+      if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+        lst(order).to -= m[0].length;
+        order.push(new BidiSpan(0, len - m[0].length, len));
+      }
+      if (order[0].level == 2)
+        order.unshift(new BidiSpan(1, order[0].to, order[0].to));
+      if (order[0].level != lst(order).level)
+        order.push(new BidiSpan(order[0].level, len, len));
+
+      return order;
+    };
+  })();
+
+  // THE END
+
+  CodeMirror.version = "5.15.3";
+
+  return CodeMirror;
+});
diff --git a/interface/static/js/codemirror/mode/python/index.html b/interface/static/js/codemirror/mode/python/index.html
new file mode 100644
index 0000000..6116a13
--- /dev/null
+++ b/interface/static/js/codemirror/mode/python/index.html
@@ -0,0 +1,198 @@
+<!doctype html>
+
+<title>CodeMirror: Python mode</title>
+<meta charset="utf-8"/>
+<link rel=stylesheet href="../../doc/docs.css">
+
+<link rel="stylesheet" href="../../lib/codemirror.css">
+<script src="../../lib/codemirror.js"></script>
+<script src="../../addon/edit/matchbrackets.js"></script>
+<script src="python.js"></script>
+<style type="text/css">.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}</style>
+<div id=nav>
+  <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
+
+  <ul>
+    <li><a href="../../index.html">Home</a>
+    <li><a href="../../doc/manual.html">Manual</a>
+    <li><a href="https://github.com/codemirror/codemirror">Code</a>
+  </ul>
+  <ul>
+    <li><a href="../index.html">Language modes</a>
+    <li><a class=active href="#">Python</a>
+  </ul>
+</div>
+
+<article>
+<h2>Python mode</h2>
+
+    <div><textarea id="code" name="code">
+# Literals
+1234
+0.0e101
+.123
+0b01010011100
+0o01234567
+0x0987654321abcdef
+7
+2147483647
+3L
+79228162514264337593543950336L
+0x100000000L
+79228162514264337593543950336
+0xdeadbeef
+3.14j
+10.j
+10j
+.001j
+1e100j
+3.14e-10j
+
+
+# String Literals
+'For\''
+"God\""
+"""so loved
+the world"""
+'''that he gave
+his only begotten\' '''
+'that whosoever believeth \
+in him'
+''
+
+# Identifiers
+__a__
+a.b
+a.b.c
+
+#Unicode identifiers on Python3
+# a = x\ddot
+a⃗ = ẍ
+# a = v\dot
+a⃗ = v̇
+
+#F\vec = m \cdot a\vec
+F⃗ = m•a⃗ 
+
+# Operators
++ - * / % & | ^ ~ < >
+== != <= >= <> << >> // **
+and or not in is
+
+#infix matrix multiplication operator (PEP 465)
+A @ B
+
+# Delimiters
+() [] {} , : ` = ; @ .  # Note that @ and . require the proper context on Python 2.
++= -= *= /= %= &= |= ^=
+//= >>= <<= **=
+
+# Keywords
+as assert break class continue def del elif else except
+finally for from global if import lambda pass raise
+return try while with yield
+
+# Python 2 Keywords (otherwise Identifiers)
+exec print
+
+# Python 3 Keywords (otherwise Identifiers)
+nonlocal
+
+# Types
+bool classmethod complex dict enumerate float frozenset int list object
+property reversed set slice staticmethod str super tuple type
+
+# Python 2 Types (otherwise Identifiers)
+basestring buffer file long unicode xrange
+
+# Python 3 Types (otherwise Identifiers)
+bytearray bytes filter map memoryview open range zip
+
+# Some Example code
+import os
+from package import ParentClass
+
+@nonsenseDecorator
+def doesNothing():
+    pass
+
+class ExampleClass(ParentClass):
+    @staticmethod
+    def example(inputStr):
+        a = list(inputStr)
+        a.reverse()
+        return ''.join(a)
+
+    def __init__(self, mixin = 'Hello'):
+        self.mixin = mixin
+
+</textarea></div>
+
+
+<h2>Cython mode</h2>
+
+<div><textarea id="code-cython" name="code-cython">
+
+import numpy as np
+cimport cython
+from libc.math cimport sqrt
+
+@cython.boundscheck(False)
+@cython.wraparound(False)
+def pairwise_cython(double[:, ::1] X):
+    cdef int M = X.shape[0]
+    cdef int N = X.shape[1]
+    cdef double tmp, d
+    cdef double[:, ::1] D = np.empty((M, M), dtype=np.float64)
+    for i in range(M):
+        for j in range(M):
+            d = 0.0
+            for k in range(N):
+                tmp = X[i, k] - X[j, k]
+                d += tmp * tmp
+            D[i, j] = sqrt(d)
+    return np.asarray(D)
+
+</textarea></div>
+
+    <script>
+      var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
+        mode: {name: "python",
+               version: 3,
+               singleLineStringErrors: false},
+        lineNumbers: true,
+        indentUnit: 4,
+        matchBrackets: true
+    });
+
+    CodeMirror.fromTextArea(document.getElementById("code-cython"), {
+        mode: {name: "text/x-cython",
+               version: 2,
+               singleLineStringErrors: false},
+        lineNumbers: true,
+        indentUnit: 4,
+        matchBrackets: true
+      });
+    </script>
+    <h2>Configuration Options for Python mode:</h2>
+    <ul>
+      <li>version - 2/3 - The version of Python to recognize.  Default is 2.</li>
+      <li>singleLineStringErrors - true/false - If you have a single-line string that is not terminated at the end of the line, this will show subsequent lines as errors if true, otherwise it will consider the newline as the end of the string. Default is false.</li>
+      <li>hangingIndent - int - If you want to write long arguments to a function starting on a new line, how much that line should be indented. Defaults to one normal indentation unit.</li>
+    </ul>
+    <h2>Advanced Configuration Options:</h2>
+    <p>Usefull for superset of python syntax like Enthought enaml, IPython magics and  questionmark help</p>
+    <ul>
+      <li>singleOperators - RegEx - Regular Expression for single operator matching,  default : <pre>^[\\+\\-\\*/%&amp;|\\^~&lt;&gt;!]</pre> including <pre>@</pre> on Python 3</li>
+      <li>singleDelimiters - RegEx - Regular Expression for single delimiter matching, default :  <pre>^[\\(\\)\\[\\]\\{\\}@,:`=;\\.]</pre></li>
+      <li>doubleOperators - RegEx - Regular Expression for double operators matching, default : <pre>^((==)|(!=)|(&lt;=)|(&gt;=)|(&lt;&gt;)|(&lt;&lt;)|(&gt;&gt;)|(//)|(\\*\\*))</pre></li>
+      <li>doubleDelimiters - RegEx - Regular Expression for double delimiters matching, default : <pre>^((\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&amp;=)|(\\|=)|(\\^=))</pre></li>
+      <li>tripleDelimiters - RegEx - Regular Expression for triple delimiters matching, default : <pre>^((//=)|(&gt;&gt;=)|(&lt;&lt;=)|(\\*\\*=))</pre></li>
+      <li>identifiers - RegEx - Regular Expression for identifier, default : <pre>^[_A-Za-z][_A-Za-z0-9]*</pre> on Python 2 and <pre>^[_A-Za-z\u00A1-\uFFFF][_A-Za-z0-9\u00A1-\uFFFF]*</pre> on Python 3.</li>
+      <li>extra_keywords - list of string - List of extra words ton consider as keywords</li>
+      <li>extra_builtins - list of string - List of extra words ton consider as builtins</li>
+    </ul>
+
+
+    <p><strong>MIME types defined:</strong> <code>text/x-python</code> and <code>text/x-cython</code>.</p>
+  </article>
diff --git a/interface/static/js/codemirror/mode/python/python.js b/interface/static/js/codemirror/mode/python/python.js
new file mode 100644
index 0000000..ec662b1
--- /dev/null
+++ b/interface/static/js/codemirror/mode/python/python.js
@@ -0,0 +1,340 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  function wordRegexp(words) {
+    return new RegExp("^((" + words.join(")|(") + "))\\b");
+  }
+
+  var wordOperators = wordRegexp(["and", "or", "not", "is"]);
+  var commonKeywords = ["as", "assert", "break", "class", "continue",
+                        "def", "del", "elif", "else", "except", "finally",
+                        "for", "from", "global", "if", "import",
+                        "lambda", "pass", "raise", "return",
+                        "try", "while", "with", "yield", "in"];
+  var commonBuiltins = ["abs", "all", "any", "bin", "bool", "bytearray", "callable", "chr",
+                        "classmethod", "compile", "complex", "delattr", "dict", "dir", "divmod",
+                        "enumerate", "eval", "filter", "float", "format", "frozenset",
+                        "getattr", "globals", "hasattr", "hash", "help", "hex", "id",
+                        "input", "int", "isinstance", "issubclass", "iter", "len",
+                        "list", "locals", "map", "max", "memoryview", "min", "next",
+                        "object", "oct", "open", "ord", "pow", "property", "range",
+                        "repr", "reversed", "round", "set", "setattr", "slice",
+                        "sorted", "staticmethod", "str", "sum", "super", "tuple",
+                        "type", "vars", "zip", "__import__", "NotImplemented",
+                        "Ellipsis", "__debug__"];
+  CodeMirror.registerHelper("hintWords", "python", commonKeywords.concat(commonBuiltins));
+
+  function top(state) {
+    return state.scopes[state.scopes.length - 1];
+  }
+
+  CodeMirror.defineMode("python", function(conf, parserConf) {
+    var ERRORCLASS = "error";
+
+    var singleDelimiters = parserConf.singleDelimiters || /^[\(\)\[\]\{\}@,:`=;\.]/;
+    var doubleOperators = parserConf.doubleOperators || /^([!<>]==|<>|<<|>>|\/\/|\*\*)/;
+    var doubleDelimiters = parserConf.doubleDelimiters || /^(\+=|\-=|\*=|%=|\/=|&=|\|=|\^=)/;
+    var tripleDelimiters = parserConf.tripleDelimiters || /^(\/\/=|>>=|<<=|\*\*=)/;
+
+    var hangingIndent = parserConf.hangingIndent || conf.indentUnit;
+
+    var myKeywords = commonKeywords, myBuiltins = commonBuiltins;
+    if (parserConf.extra_keywords != undefined)
+      myKeywords = myKeywords.concat(parserConf.extra_keywords);
+
+    if (parserConf.extra_builtins != undefined)
+      myBuiltins = myBuiltins.concat(parserConf.extra_builtins);
+
+    var py3 = parserConf.version && parseInt(parserConf.version, 10) == 3
+    if (py3) {
+      // since http://legacy.python.org/dev/peps/pep-0465/ @ is also an operator
+      var singleOperators = parserConf.singleOperators || /^[\+\-\*\/%&|\^~<>!@]/;
+      var identifiers = parserConf.identifiers|| /^[_A-Za-z\u00A1-\uFFFF][_A-Za-z0-9\u00A1-\uFFFF]*/;
+      myKeywords = myKeywords.concat(["nonlocal", "False", "True", "None", "async", "await"]);
+      myBuiltins = myBuiltins.concat(["ascii", "bytes", "exec", "print"]);
+      var stringPrefixes = new RegExp("^(([rbuf]|(br))?('{3}|\"{3}|['\"]))", "i");
+    } else {
+      var singleOperators = parserConf.singleOperators || /^[\+\-\*\/%&|\^~<>!]/;
+      var identifiers = parserConf.identifiers|| /^[_A-Za-z][_A-Za-z0-9]*/;
+      myKeywords = myKeywords.concat(["exec", "print"]);
+      myBuiltins = myBuiltins.concat(["apply", "basestring", "buffer", "cmp", "coerce", "execfile",
+                                      "file", "intern", "long", "raw_input", "reduce", "reload",
+                                      "unichr", "unicode", "xrange", "False", "True", "None"]);
+      var stringPrefixes = new RegExp("^(([rub]|(ur)|(br))?('{3}|\"{3}|['\"]))", "i");
+    }
+    var keywords = wordRegexp(myKeywords);
+    var builtins = wordRegexp(myBuiltins);
+
+    // tokenizers
+    function tokenBase(stream, state) {
+      if (stream.sol()) state.indent = stream.indentation()
+      // Handle scope changes
+      if (stream.sol() && top(state).type == "py") {
+        var scopeOffset = top(state).offset;
+        if (stream.eatSpace()) {
+          var lineOffset = stream.indentation();
+          if (lineOffset > scopeOffset)
+            pushPyScope(state);
+          else if (lineOffset < scopeOffset && dedent(stream, state))
+            state.errorToken = true;
+          return null;
+        } else {
+          var style = tokenBaseInner(stream, state);
+          if (scopeOffset > 0 && dedent(stream, state))
+            style += " " + ERRORCLASS;
+          return style;
+        }
+      }
+      return tokenBaseInner(stream, state);
+    }
+
+    function tokenBaseInner(stream, state) {
+      if (stream.eatSpace()) return null;
+
+      var ch = stream.peek();
+
+      // Handle Comments
+      if (ch == "#") {
+        stream.skipToEnd();
+        return "comment";
+      }
+
+      // Handle Number Literals
+      if (stream.match(/^[0-9\.]/, false)) {
+        var floatLiteral = false;
+        // Floats
+        if (stream.match(/^\d*\.\d+(e[\+\-]?\d+)?/i)) { floatLiteral = true; }
+        if (stream.match(/^\d+\.\d*/)) { floatLiteral = true; }
+        if (stream.match(/^\.\d+/)) { floatLiteral = true; }
+        if (floatLiteral) {
+          // Float literals may be "imaginary"
+          stream.eat(/J/i);
+          return "number";
+        }
+        // Integers
+        var intLiteral = false;
+        // Hex
+        if (stream.match(/^0x[0-9a-f]+/i)) intLiteral = true;
+        // Binary
+        if (stream.match(/^0b[01]+/i)) intLiteral = true;
+        // Octal
+        if (stream.match(/^0o[0-7]+/i)) intLiteral = true;
+        // Decimal
+        if (stream.match(/^[1-9]\d*(e[\+\-]?\d+)?/)) {
+          // Decimal literals may be "imaginary"
+          stream.eat(/J/i);
+          // TODO - Can you have imaginary longs?
+          intLiteral = true;
+        }
+        // Zero by itself with no other piece of number.
+        if (stream.match(/^0(?![\dx])/i)) intLiteral = true;
+        if (intLiteral) {
+          // Integer literals may be "long"
+          stream.eat(/L/i);
+          return "number";
+        }
+      }
+
+      // Handle Strings
+      if (stream.match(stringPrefixes)) {
+        state.tokenize = tokenStringFactory(stream.current());
+        return state.tokenize(stream, state);
+      }
+
+      // Handle operators and Delimiters
+      if (stream.match(tripleDelimiters) || stream.match(doubleDelimiters))
+        return "punctuation";
+
+      if (stream.match(doubleOperators) || stream.match(singleOperators))
+        return "operator";
+
+      if (stream.match(singleDelimiters))
+        return "punctuation";
+
+      if (state.lastToken == "." && stream.match(identifiers))
+        return "property";
+
+      if (stream.match(keywords) || stream.match(wordOperators))
+        return "keyword";
+
+      if (stream.match(builtins))
+        return "builtin";
+
+      if (stream.match(/^(self|cls)\b/))
+        return "variable-2";
+
+      if (stream.match(identifiers)) {
+        if (state.lastToken == "def" || state.lastToken == "class")
+          return "def";
+        return "variable";
+      }
+
+      // Handle non-detected items
+      stream.next();
+      return ERRORCLASS;
+    }
+
+    function tokenStringFactory(delimiter) {
+      while ("rub".indexOf(delimiter.charAt(0).toLowerCase()) >= 0)
+        delimiter = delimiter.substr(1);
+
+      var singleline = delimiter.length == 1;
+      var OUTCLASS = "string";
+
+      function tokenString(stream, state) {
+        while (!stream.eol()) {
+          stream.eatWhile(/[^'"\\]/);
+          if (stream.eat("\\")) {
+            stream.next();
+            if (singleline && stream.eol())
+              return OUTCLASS;
+          } else if (stream.match(delimiter)) {
+            state.tokenize = tokenBase;
+            return OUTCLASS;
+          } else {
+            stream.eat(/['"]/);
+          }
+        }
+        if (singleline) {
+          if (parserConf.singleLineStringErrors)
+            return ERRORCLASS;
+          else
+            state.tokenize = tokenBase;
+        }
+        return OUTCLASS;
+      }
+      tokenString.isString = true;
+      return tokenString;
+    }
+
+    function pushPyScope(state) {
+      while (top(state).type != "py") state.scopes.pop()
+      state.scopes.push({offset: top(state).offset + conf.indentUnit,
+                         type: "py",
+                         align: null})
+    }
+
+    function pushBracketScope(stream, state, type) {
+      var align = stream.match(/^([\s\[\{\(]|#.*)*$/, false) ? null : stream.column() + 1
+      state.scopes.push({offset: state.indent + hangingIndent,
+                         type: type,
+                         align: align})
+    }
+
+    function dedent(stream, state) {
+      var indented = stream.indentation();
+      while (top(state).offset > indented) {
+        if (top(state).type != "py") return true;
+        state.scopes.pop();
+      }
+      return top(state).offset != indented;
+    }
+
+    function tokenLexer(stream, state) {
+      if (stream.sol()) state.beginningOfLine = true;
+
+      var style = state.tokenize(stream, state);
+      var current = stream.current();
+
+      // Handle decorators
+      if (state.beginningOfLine && current == "@")
+        return stream.match(identifiers, false) ? "meta" : py3 ? "operator" : ERRORCLASS;
+
+      if (/\S/.test(current)) state.beginningOfLine = false;
+
+      if ((style == "variable" || style == "builtin")
+          && state.lastToken == "meta")
+        style = "meta";
+
+      // Handle scope changes.
+      if (current == "pass" || current == "return")
+        state.dedent += 1;
+
+      if (current == "lambda") state.lambda = true;
+      if (current == ":" && !state.lambda && top(state).type == "py")
+        pushPyScope(state);
+
+      var delimiter_index = current.length == 1 ? "[({".indexOf(current) : -1;
+      if (delimiter_index != -1)
+        pushBracketScope(stream, state, "])}".slice(delimiter_index, delimiter_index+1));
+
+      delimiter_index = "])}".indexOf(current);
+      if (delimiter_index != -1) {
+        if (top(state).type == current) state.indent = state.scopes.pop().offset - hangingIndent
+        else return ERRORCLASS;
+      }
+      if (state.dedent > 0 && stream.eol() && top(state).type == "py") {
+        if (state.scopes.length > 1) state.scopes.pop();
+        state.dedent -= 1;
+      }
+
+      return style;
+    }
+
+    var external = {
+      startState: function(basecolumn) {
+        return {
+          tokenize: tokenBase,
+          scopes: [{offset: basecolumn || 0, type: "py", align: null}],
+          indent: basecolumn || 0,
+          lastToken: null,
+          lambda: false,
+          dedent: 0
+        };
+      },
+
+      token: function(stream, state) {
+        var addErr = state.errorToken;
+        if (addErr) state.errorToken = false;
+        var style = tokenLexer(stream, state);
+
+        if (style && style != "comment")
+          state.lastToken = (style == "keyword" || style == "punctuation") ? stream.current() : style;
+        if (style == "punctuation") style = null;
+
+        if (stream.eol() && state.lambda)
+          state.lambda = false;
+        return addErr ? style + " " + ERRORCLASS : style;
+      },
+
+      indent: function(state, textAfter) {
+        if (state.tokenize != tokenBase)
+          return state.tokenize.isString ? CodeMirror.Pass : 0;
+
+        var scope = top(state), closing = scope.type == textAfter.charAt(0)
+        if (scope.align != null)
+          return scope.align - (closing ? 1 : 0)
+        else
+          return scope.offset - (closing ? hangingIndent : 0)
+      },
+
+      electricInput: /^\s*[\}\]\)]$/,
+      closeBrackets: {triples: "'\""},
+      lineComment: "#",
+      fold: "indent"
+    };
+    return external;
+  });
+
+  CodeMirror.defineMIME("text/x-python", "python");
+
+  var words = function(str) { return str.split(" "); };
+
+  CodeMirror.defineMIME("text/x-cython", {
+    name: "python",
+    extra_keywords: words("by cdef cimport cpdef ctypedef enum except"+
+                          "extern gil include nogil property public"+
+                          "readonly struct union DEF IF ELIF ELSE")
+  });
+
+});
diff --git a/interface/static/js/codemirror/mode/python/test.js b/interface/static/js/codemirror/mode/python/test.js
new file mode 100644
index 0000000..c1a9c6a
--- /dev/null
+++ b/interface/static/js/codemirror/mode/python/test.js
@@ -0,0 +1,30 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+(function() {
+  var mode = CodeMirror.getMode({indentUnit: 4},
+              {name: "python",
+               version: 3,
+               singleLineStringErrors: false});
+  function MT(name) { test.mode(name, mode, Array.prototype.slice.call(arguments, 1)); }
+
+  // Error, because "foobarhello" is neither a known type or property, but
+  // property was expected (after "and"), and it should be in parentheses.
+  MT("decoratorStartOfLine",
+     "[meta @dec]",
+     "[keyword def] [def function]():",
+     "    [keyword pass]");
+
+  MT("decoratorIndented",
+     "[keyword class] [def Foo]:",
+     "    [meta @dec]",
+     "    [keyword def] [def function]():",
+     "        [keyword pass]");
+
+  MT("matmulWithSpace:", "[variable a] [operator @] [variable b]");
+  MT("matmulWithoutSpace:", "[variable a][operator @][variable b]");
+  MT("matmulSpaceBefore:", "[variable a] [operator @][variable b]");
+
+  MT("fValidStringPrefix", "[string f'this is a {formatted} string']");
+  MT("uValidStringPrefix", "[string u'this is an unicode string']");
+})();
diff --git a/interface/static/templates/add_question.html b/interface/static/templates/add_question.html
new file mode 100644
index 0000000..75cc580
--- /dev/null
+++ b/interface/static/templates/add_question.html
@@ -0,0 +1,136 @@
+{% extends "navigation.html" %}
+{% load custom_filter %}
+{% block script %}
+<script language="JavaScript" type="text/javascript" src="https://code.jquery.com/jquery-1.12.4.min.js"/>
+{% endblock %}
+
+{% block navbar %}
+<li><a href="{% url 'home' %}">Home</a></li>
+<li class="active"><a href="{% url 'show_all_questions' %}">Contribution</a></li>
+<li><a href="https://yaksh-contribution.readthedocs.io" target="_blank">Instructions</a></li>
+<li><a href="{% url 'logout_page' %}">Logout</a></li>
+ {% endblock %}
+
+{% block pagetitle %} Add Question {% endblock pagetitle %}
+
+{% block onload %} onload='javascript:textareaformat();' {% endblock %}
+
+{% block content %}
+<script>
+  $(document).ready(function(){
+$('#id_description').bind('keypress', function (event){
+    document.getElementById('my').innerHTML = document.getElementById('id_description').value ;
+  });
+$("input[name*='type']").attr("readonly", true);
+});
+
+ </script>
+{% if question %}
+<form action="{{ URL_ROOT }}/addquestion/{{ question.id }}/" method="post" name="frm" enctype="multipart/form-data">
+{% else %}
+<form action="{{ URL_ROOT }}/addquestion/" method="post" name="frm" enctype="multipart/form-data">
+{% endif %}
+  {% csrf_token %}
+  <center><table class="table">
+  <tr><td>Summary: <td>{{ qform.summary }}{{ qform.summary.errors }}
+  <tr><td>Points:<td>{{qform.points }}{{ qform.points.errors }} 
+    <tr><td><strong>Rendered: </strong><td><p id='my'></p>
+  <tr><td>Description: <td>{{ qform.description}}  {{qform.description.errors}}
+  {% if solution_error %}
+  <tr style="background-color: #f7a3a0"><td>Solution: <td>{{ qform.solution }}{{qform.solution.errors}}
+  <br><br>
+  <p> <b>The following error took place: </b></p>
+        <table class="table table-bordered" width="100%" id='assertion'>
+        <col width="30%">
+            <tr class = "active">
+              <td><b>Exception Name: </b></td>
+              <td><span style="color: #d9534f">{{solution_error.0.exception}}</span></td>
+          </tr>
+          <tr>
+            <td><b>Exception Message: </b></td><td>{{solution_error.0.message}}</td>
+          </tr>
+          <tr>
+            {% if soltion_error.0.traceback %}
+            <td><b>Full Traceback: </b></td>
+            <td><pre>{{error.traceback}}</pre></td>
+            {% endif %}
+          </tr>
+        </table>
+  </span>
+  {% else %}
+  <tr><td>Solution: <td>{{ qform.solution }}{{qform.solution.errors}}
+  {% endif %}
+    <tr><td>Citation: <td>{{ qform.citation }}{{qform.citation.errors}}
+ <tr><td>Source: <td>{{ qform.originality }} {{qform.originality.errors}}
+  </table></center>
+  {% for formset in formsets %}
+  <div class="form-group">
+      {{ formset.management_form }}
+
+      {% for form in formset %}
+        <div class="link-formset well">
+          {{ form.as_p }}
+          {% if form.expected_output.value %}
+            {% get_testcase_error tc_error form.expected_output.value as stdio_dict %}
+            {% if stdio_dict.success  %}
+                {% if stdio_dict.tc_error.given_input %}
+                 <table class="table table-bordered">
+                  <col width="30%">
+                    <tr class = "active">
+                    <td> For given Input value(s):</td>
+                    <td>{{stdio_dict.tc_error.given_input}}</td>
+                    </tr>
+                 </table>
+               {% endif %}
+
+                <table class="table table-bordered" width="100%" id="stdio">
+                  <col width="10%">
+                  <col width="40%">
+                  <col width="40%">
+                  <col width="10%">
+                  <tr class="info">
+                  <th><center>Line No.</center></th>
+                  <th><center>Expected Output</center></th>
+                  <th><center>User output</center></th>
+                  <th><center>Status</center></th>
+                  </tr>
+                  {% for expected,user in stdio_dict.tc_error.expected_output|zip:stdio_dict.tc_error.user_output %}
+                  <td> {{forloop.counter}} </td>
+                  <td>{{expected|default:""}} </td>
+                  <td>{{user|default:""}}</td>
+                  {% if forloop.counter0 in stdio_dict.tc_error.error_line_numbers or not expected or not user %}
+                  <td><span class ="glyphicon glyphicon-remove text-warning"/></td>
+                  {% else %}
+                  <td><span class ="glyphicon glyphicon-ok text-success"/></td>
+                  {% endif %}
+                  </tr>
+                  {% endfor %}
+                  </table>
+                  <table width="100%" class='table table-bordered'>
+                  <col width="10">
+                  <tr class = "danger">
+                  <td><b>Error:</b></td>
+                   <td>{{stdio_dict.tc_error.error_msg}}</td>
+                   </tr>
+                </table>
+          {% else %}
+          <div class="alert alert-success">
+            Output of the Solution matches with the expected output
+          </div>
+          {% endif %} {# closes stdio_error #}
+        </div>
+        {% endif %} {# closes form.expected_output.value #}
+      {% endfor %}
+
+  </div>
+  {% endfor %}
+  <p><label for="case_type">Add Test Case:</label> <select id="case_type" name="case_type" onchange="frm.submit()">
+      <option value="" selected="selected">---------</option>
+      <option value="stdiobasedtestcase">StdIO </option>
+  </select></p>
+  <center>
+    <button class="btn" type="submit" name="save_question">Check and Save</button>
+    <button class="btn" type="button" name="button" onClick='location.replace("{{URL_ROOT}}/showquestions/");'>Back to Questions</button>
+  </center>
+</form>
+{% endblock %}
diff --git a/interface/static/templates/checkquestion.html b/interface/static/templates/checkquestion.html
new file mode 100644
index 0000000..6dc0f9e
--- /dev/null
+++ b/interface/static/templates/checkquestion.html
@@ -0,0 +1,167 @@
+{% extends "navigation.html" %}
+{% load custom_filter %}
+{% load staticfiles %}
+
+{% block navbar %}
+<li><a href="{% url 'home' %}">Home</a></li>
+<li class="active"><a href="{% url 'show_all_questions' %}">Contribution</a></li>
+<li><a href="https://yaksh-contribution.readthedocs.io" target="_blank">Instructions</a></li>
+<li><a href="{% url 'logout_page' %}">Logout</a></li>
+ {% endblock %}
+
+ {% block content %}
+<link rel="stylesheet" href="{% static 'css/codemirror/lib/codemirror.css' %}" type="text/css" />
+<style type="text/css">
+  .CodeMirror{
+    border-style: groove;
+  }
+</style>
+<form id="code" action="{% url 'check_question' question.id %}" method="post" enctype="multipart/form-data">
+  {% csrf_token %}
+<div class="panel panel-default">
+    <div class="panel-heading">
+        <h4>
+            <u>{{ question.summary }}</u>
+            <font class=pull-right>Points : {{ question.points }}</font>
+        </h4>
+    </div>
+    
+    <div class="panel panel-body">
+        <div class="well well-sm">
+            <font size=3 face=arial> {{ question.description|safe }} </font>
+        </div>
+    </div>
+</div>
+
+<div class="row">
+<div class="col-md-9">
+<h4>Write your program below:</h4>
+</div>
+</div>
+<textarea autofocus name="answer" id="answer"></textarea>
+<script  type="text/javascript" src= "{% static 'js/codemirror/lib/codemirror.js' %}"></script>
+<script src="{% static 'js/codemirror/mode/python/python.js' %}"></script>
+<script src="{% static 'js/codemirror/mode/python/python.js' %}"></script>
+{% if last_answer %}
+<script type="text/javascript">
+  var set_val = "{{last_answer|escape_quotes|safe}}"
+</script>
+{% else %}
+<script type="text/javascript">
+  var set_val = ""
+</script>
+{% endif %}
+<script type="text/javascript">
+    var global_editor = {};
+    var textarea_node = document.querySelector('#answer');
+    var options = {
+      mode: "python",
+      gutter: true,
+      lineNumbers: true,
+      onChange: function (instance, changes) {
+          render();
+      }
+  };
+  
+  // Initialize the codemirror editor
+  global_editor.editor = CodeMirror.fromTextArea(textarea_node, options);
+
+  global_editor.editor.setValue(set_val);
+
+  // Setting code editors initial content
+</script>
+<br>
+{% if not correct_answer %}
+<button class="btn btn-success" type="submit" name="check" id="check" >
+  <span class="glyphicon glyphicon-cog"></span>
+   Check Answer
+ </button>
+{% else %}
+<a href="{% url 'post_review' 'submit' question.id %}" class="btn btn-success">
+Submit Review
+</a>
+{% endif %}
+ &nbsp;&nbsp;
+
+<a href="{% url 'show_review_questions' %}" class="btn btn-primary">
+  <span class="glyphicon glyphicon-arrow-left"></span>
+  Go Back to Questions
+</a>&nbsp;&nbsp;
+
+<button class="btn btn-danger" type="submit" name="skip" id="skip">
+  <span class="glyphicon glyphicon-remove"></span>
+  Skip Question
+</button>&nbsp;&nbsp;
+
+</form>
+<br><br>
+{% if result %}
+<div class = "alert alert-danger">
+<p>Hey, we checked your answer. We encountered the following error:</p>
+</div>
+{%for error in result %}
+      {% if error.type == 'assertion' %}
+        
+        <p> <b>The following error took place: </b></p>
+        <table class="table table-bordered" width="100%" id='assertion'>
+        <col width="30%">
+            <tr class = "active">
+              <td><b>Exception Name: </b></td>
+              <td><span style="color: #d9534f">{{error.exception}}</span></td>
+          </tr>
+          <tr>
+            <td><b>Exception Message: </b></td><td>{{error.message}}</td>
+          </tr>
+          <tr>
+            {% if error.traceback %}
+            <td><b>Full Traceback: </b></td>
+            <td><pre>{{error.traceback}}</pre></td>
+            {% endif %}
+          </tr>
+        </table>
+
+      {% elif error.type == 'stdio' %}
+  {% if error.given_input %}
+           <table class="table table-bordered">
+            <col width="30%">
+              <tr class = "active">
+              <td> For given Input value(s):</td>
+              <td>{{error.given_input}}</td>
+              </tr>
+           </table>
+         {% endif %}
+
+          <table class="table table-bordered" width="100%" id="stdio">
+            <col width="10%">
+            <col width="40%">
+            <col width="40%">
+            <col width="10%">
+            <tr class="info">
+            <th><center>Line No.</center></th>
+            <th><center>Expected Output</center></th>
+            <th><center>User output</center></th>
+            <th><center>Status</center></th>
+            </tr>
+            {% for expected,user in error.expected_output|zip:error.user_output %}
+            <td> {{forloop.counter}} </td>
+            <td>{{expected|default:""}} </td>
+            <td>{{user|default:""}}</td>
+            {% if forloop.counter0 in error.error_line_numbers or not expected or not user %}
+            <td><span class ="glyphicon glyphicon-remove text-warning"/></td>
+            {% else %}
+            <td><span class ="glyphicon glyphicon-ok text-success"/></td>
+            {% endif %}
+            </tr>
+            {% endfor %}
+            </table>
+            <table width="100%" class='table table-bordered'>
+            <col width="10">
+            <tr class = "danger">
+            <td><b>Error:</b></td>
+             <td>{{error.error_msg}}</td>
+             </tr>
+            </table>
+{% endif %}            
+{% endfor %}
+{% endif %}
+{% endblock %}
\ No newline at end of file
diff --git a/interface/static/templates/dashboard.html b/interface/static/templates/dashboard.html
new file mode 100644
index 0000000..540088a
--- /dev/null
+++ b/interface/static/templates/dashboard.html
@@ -0,0 +1,27 @@
+{% extends "navigation.html" %}
+{% block navbar %}
+<li class="active"><a href="{% url 'home' %}">Home</a></li>
+<li><a href="{% url 'show_all_questions'%}">Contribution</a></li>
+<li><a href="https://yaksh-contribution.readthedocs.io" target="_blank">Instructions</a></li>
+<li><a href="{% url 'logout_page' %}">Logout</a></li>
+{% endblock %}
+
+{% block content %}
+<html lang="en">
+<head></head>
+
+<div class="container">
+
+  <br><br>
+  <h1>Welcome {{name}}</h1><br/>
+  <p>
+  You can contribute questions here by clicking on Start Contribution.<br>
+  For instructions on how to create questions click <a href="https://yaksh-contribution.readthedocs.io" target="_blank">here</a>.
+  <br/> <br /><a class="btn btn-primary" href="{% url 'show_all_questions' %}">Start Contribution</a>
+  </p>
+  </center>
+</div>
+
+</body>
+</html>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/notice.html b/interface/static/templates/home.html
similarity index 57%
rename from templates/notice.html
rename to interface/static/templates/home.html
index d60b5ed..2d0b2d3 100644
--- a/templates/notice.html
+++ b/interface/static/templates/home.html
@@ -1,10 +1,10 @@
 {% extends "navigation.html" %}
 {% block navbar %}
-
 <li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
+<li><a href="{% url 'login' %}">Login</a></li>
+<li><a href="{% url 'register_page' %}">Signup</a></li>
 {% endblock %}
+
 {% block content %}
 <html lang="en">
 <head>
@@ -14,11 +14,10 @@
 <div class="container">
 <center>
   <br><br>
-  <p>{{ notice|safe }}</p>
- 
+  <h1>Welcome to FOSSEE Fellowship Question Contribution Interface</h1><br/>
   </center>
 </div>
 
 </body>
 </html>
-{% endblock %}
+{% endblock %}
\ No newline at end of file
diff --git a/templates/registration/login.html b/interface/static/templates/login.html
similarity index 75%
rename from templates/registration/login.html
rename to interface/static/templates/login.html
index 2d09453..ce81018 100644
--- a/templates/registration/login.html
+++ b/interface/static/templates/login.html
@@ -20,9 +20,19 @@ <h3>Login Here</h3>
             <tr><th><label for="id_username">Username:</label></th><td>{{ form.username }}</td></tr>
             <tr><th><label for="id_password">Password:</label></th><td>{{ form.password }}</td></tr>
         </table>
+        <br>
         <input type="submit" class="btn btn-primary"value="Login" />
         <input type="hidden" class="btn btn-primary"name="next" value="{% url 'next_login' %}" />
     </form>
     <a href="/register">Register</a>
     </center>
+    <br><br>
+    <center>
+        <div class="alert alert-info">
+            For any queries, please mail us at info@fossee.in
+        </div>
+        <br><br>
+        <iframe id="video_frame" allowfullscreen="" src="https://youtube.com/embed/34M-vS2-9Pc" width="640" height="480" frameborder="0">
+        </iframe>
+    </center>
 {% endblock %}
diff --git a/templates/moderator.html b/interface/static/templates/moderator.html
similarity index 100%
rename from templates/moderator.html
rename to interface/static/templates/moderator.html
diff --git a/templates/navigation.html b/interface/static/templates/navigation.html
similarity index 69%
rename from templates/navigation.html
rename to interface/static/templates/navigation.html
index 5589f38..b3ecef8 100644
--- a/templates/navigation.html
+++ b/interface/static/templates/navigation.html
@@ -1,6 +1,16 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
+  <!-- Global site tag (gtag.js) - Google Analytics -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=UA-82999923-22"></script>
+<script>
+ window.dataLayer = window.dataLayer || [];
+ function gtag(){dataLayer.push(arguments);}
+ gtag('js', new Date());
+
+ gtag('config', 'UA-82999923-22');
+</script>
+
 {% load staticfiles %}
   <title>Yaksh | Home</title>
   <meta charset="utf-8">
diff --git a/templates/registration/register.html b/interface/static/templates/register.html
similarity index 68%
rename from templates/registration/register.html
rename to interface/static/templates/register.html
index a5f3df4..fd62c69 100644
--- a/templates/registration/register.html
+++ b/interface/static/templates/register.html
@@ -8,19 +8,27 @@
  <li><a href="{% url 'login' %}">Login</a></li>
    
       <li><a href="{% url 'register_page' %}">Signup</a></li>
-     
   {% endblock %}
 {% block content %}
 
+{% if messages %}
+{% for message in messages %}
+    <center>
+    <div class= "alert alert-success">
+    <li>{{ message|safe }}</li>
+    </div>
+    </center>
+    {% endfor %}
+{% endif %}
 <center>
  <h3>Register here</h3>
-    <form method="post" action=".">{% csrf_token %}
+    <form method="post" action="">{% csrf_token %}
         <table border="0">
             {{ form.as_table }}
         </table>
         </br>
         <input type="submit" class="btn btn-primary" value="Register" />
     </form></br>
-    <a href="/">Login</a>
+    <a href="{% url 'login' %}">Login</a>
     </center>
 {% endblock %}
diff --git a/interface/static/templates/show_review_questions.html b/interface/static/templates/show_review_questions.html
new file mode 100644
index 0000000..8edaf30
--- /dev/null
+++ b/interface/static/templates/show_review_questions.html
@@ -0,0 +1,80 @@
+{% extends "dashboard.html" %}
+{% load custom_filter %}
+{% block navbar %}
+<li><a href="{% url 'home' %}">Home</a></li>
+<li class="active"><a href="{% url 'show_all_questions' %}">Contribution</a></li>
+<li><a href="https://yaksh-contribution.readthedocs.io" target="_blank">Instructions</a></li>
+<li><a href="{% url 'logout_page' %}">Logout</a></li>
+ {% endblock %}
+
+{% block title %} Questions {% endblock %}
+
+{% block subtitle %} Review Questions {% endblock subtitle %}
+
+{% block content %}
+
+<center>
+    <h2>Review Questions</h2>
+<hr>
+{% if status %}
+<div class="alert alert-info">
+    <h4>You are now a {{status}}</h4>
+</div>
+{% endif %}
+<br><br>
+</center>
+{% if messages %}
+{% for message in messages %}
+<div class="alert alert-success">{{message|safe}}</div>
+{% endfor %}
+{% endif %}
+<div class="row">
+<!-- Show questions -->
+<div id="show" class= "tab-pane fade in active">
+<form name=frm action="" method="post">
+{% csrf_token %}
+<!-- Filtering Questions  -->
+<div id="filtered-questions">
+{% if questions %}
+<table id="questions-table" class="table table-striped">
+    <thead>
+    <tr>
+    <th> Summary </th>
+    <th> Language </th>
+    <th> Type </th>  
+    <th> Marks </th>
+    <th> Reviewed </th>
+    <th> Avg Peer Rating </th>
+    <th> Avg Moderator Rating </th>
+    </tr>
+    </thead>
+    <tbody>
+
+{% for question in questions %}
+<tr>
+<td><a href="{{URL_ROOT}}/checkquestion/{{ question.id }}">{{question.summary|capfirst}}</a></td>
+<td>{{question.language|capfirst}}</td>
+<td>{{question.type|capfirst}}</td>
+<td>{{question.points}}</td>
+{% get_review_status question user as review_status %}
+{% if review_status %}
+    <td><span class ="glyphicon glyphicon-ok text-success"/></td>
+{% else %}
+    <td><span class ="glyphicon glyphicon-remove text-warning"/></td>
+{% endif %}
+<td>{{question.averagerating_set.get.avg_peer_rating}}</td>
+<td>{{question.averagerating_set.get.avg_moderator_rating}}</td>
+
+</tr>
+{% endfor %}
+</tbody>
+</table>
+{% endif %}
+</div>
+<br>
+</form>
+</div>
+</div>
+</div>
+<!-- End of Show questions -->
+{% endblock %}
\ No newline at end of file
diff --git a/interface/static/templates/showquestions.html b/interface/static/templates/showquestions.html
new file mode 100644
index 0000000..820737e
--- /dev/null
+++ b/interface/static/templates/showquestions.html
@@ -0,0 +1,83 @@
+{% extends "dashboard.html" %}
+
+{% block navbar %}
+<li><a href="{% url 'home' %}">Home</a></li>
+<li class="active"><a href="{% url 'show_all_questions' %}">Contribution</a></li>
+<li><a href="https://yaksh-contribution.readthedocs.io" target="_blank">Instructions</a></li>
+<li><a href="{% url 'logout_page' %}">Logout</a></li>
+ {% endblock %}
+
+{% block title %} Questions {% endblock %}
+
+{% block pagetitle %} Questions {% endblock pagetitle %}
+
+{% block content %}
+<div class="row">
+<!-- Show questions -->
+<div id="show" class= "tab-pane fade in active">
+<form name=frm action="" method="post">
+{% csrf_token %}
+<!-- Filtering Questions  -->
+<div id="filtered-questions">
+    <div class = "alert alert-warning">
+    {%if remaining > 0 %}
+    <center><h4>You can add {{remaining}} more questions. </h4>
+    {% else %}
+        <center><h4>You cannot add anymore questions. Please edit or delete the existing questions. </h4>
+        {% endif %}
+</div>
+{% if questions %}
+<table id="questions-table" class="table table-striped">
+    <thead>
+    <tr>
+    <th> Select </th>
+    <th> Summary </th>
+    <th> Language </th>
+    <th> Type </th>  
+    <th> Marks </th>
+    {%if admin %}
+        <th>User</th>
+    {% endif %}    
+    <th> Status </th>
+    </tr>
+    </thead>
+    <tbody>
+    
+{% for question in questions %}
+<tr>
+<td>
+<input type="checkbox" name="question" value="{{ question.id }}">
+</td>
+<td><a href="{{URL_ROOT}}/addquestion/{{ question.id }}">{{question.summary|capfirst}}</a></td>
+<td>{{question.language|capfirst}}</td>
+<td>{{question.type|capfirst}}</td>
+<td>{{question.points}}</td>
+{% if admin %}
+<td>{{question.user}}</td>
+{% endif %}
+{% if question.status %}
+    <td><span class ="glyphicon glyphicon-ok text-success"/></td>
+{% else %}
+    <td><span class ="glyphicon glyphicon-remove text-warning"/></td>
+{% endif %}
+</tr>
+{% endfor %}
+</tbody>
+</table>
+{% endif %}
+</div>
+<br>
+<center>
+{% if not admin %}
+{% if not remaining <= 0 %}
+<button class="btn btn-primary" type="button" onclick='location.replace("{{URL_ROOT}}/addquestion/");'>Add Question <span class="glyphicon glyphicon-plus"></span></button>&nbsp;&nbsp;
+{% endif %}
+<button class="btn btn-danger" type="submit" onClick="return confirm_delete(frm);" name='delete' value='delete'>Delete Selected <span class="glyphicon glyphicon-minus"></span></button>
+{% endif %}
+</center>
+</form>
+</div>
+</div>
+</div>
+<!-- End of Show questions -->
+{% endblock %}
\ No newline at end of file
diff --git a/interface/static/templates/submissions_over.html b/interface/static/templates/submissions_over.html
new file mode 100644
index 0000000..6b7aacf
--- /dev/null
+++ b/interface/static/templates/submissions_over.html
@@ -0,0 +1,25 @@
+{% extends "navigation.html" %}
+{% block navbar %}
+<li class="active"><a href="{% url 'home' %}">Home</a></li>
+<li><a href="https://python.fossee.in/fellowship2018/">Contribution</a></li>
+<li><a href="https://yaksh-contribution.readthedocs.io" target="_blank">Instructions</a></li>
+<li><a href="{% url 'logout_page' %}">Logout</a></li>
+{% endblock %}
+
+{% block content %}
+<html lang="en">
+<head></head>
+
+<div class="container">
+
+  <br><br>
+  <h1>Sorry !!!</h1><br/>
+  <h3>
+  Submissions for FOSSEE Fellowship 2018 are now over. Please comeback later.
+  </h3>
+  </center>
+</div>
+
+</body>
+</html>
+{% endblock %}
\ No newline at end of file
diff --git a/interface/static/templates/submit_review.html b/interface/static/templates/submit_review.html
new file mode 100644
index 0000000..eda7bb8
--- /dev/null
+++ b/interface/static/templates/submit_review.html
@@ -0,0 +1,61 @@
+{% extends "navigation.html" %}
+{% load custom_filter %}
+{% load staticfiles %}
+
+{% block navbar %}
+<li><a href="{% url 'home' %}">Home</a></li>
+<li class="active"><a href="{% url 'show_all_questions' %}">Contribution</a></li>
+<li><a href="https://yaksh-contribution.readthedocs.io" target="_blank">Instructions</a></li>
+<li><a href="{% url 'logout_page' %}">Logout</a></li>
+{% endblock %}
+
+{% block content %}
+<form  action="" method="post" enctype="multipart/form-data">
+	{% csrf_token %}
+<div class="col-md-9">
+	{% if submit == "submit" %}
+	<center><h3><u>Question Details</u>:</h3></center>
+	<br>
+	<table class="table table-bordered">
+		<tr>
+			<td><b>Question Summary:</b></td>
+			<td>{{question.summary}}</td>
+		</tr>
+		<tr>
+			<td><b>Question Points:</b></td>
+			<td>{{question.points}}</td>
+		</tr>
+		<tr>
+			<td><b>Question Description:</b></td>
+			<td>{{question.description}}</td>
+		</tr>
+		<tr>
+			<td><b>Question Creator's Solution:</b></td>
+			<td><pre><code>{{question.solution}}</code></pre></td>
+		</tr>
+		<tr>
+			<td><b>Original or Adapted</b></td>
+			<td>{{ question.originality|capfirst }}</td>
+		</tr>
+		<tr>
+			<td><b>Cited Source:</b>&nbsp;(if any)</td>
+			<td>{{ question.citation }}</td>
+		</tr>
+	</table>
+	<br><br>
+	<center><h3><u>Submit your review:</u></h3></center>
+	{% else %}
+	<center><h3><u>State reasons for skipping question</u>:</h3></center>
+	{% endif %}
+
+	<br>{{rform.as_p}}<br>
+<center>
+<button class="btn btn-success" type="submit" name="submit_review" id="submit_review">
+Submit
+ </button>&nbsp;&nbsp;
+ <a href="{%url 'check_question' question.id %}" class="btn btn-primary">Go back</a>
+ </center>
+</div>
+</form>
+<br><br>
+{% endblock %}
diff --git a/interface/templatetags/__init__.py b/interface/templatetags/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/interface/templatetags/custom_filter.py b/interface/templatetags/custom_filter.py
new file mode 100644
index 0000000..0e8e562
--- /dev/null
+++ b/interface/templatetags/custom_filter.py
@@ -0,0 +1,40 @@
+from django import template
+from django.template.defaultfilters import stringfilter
+try:
+    from itertools import zip_longest
+except ImportError:
+    from itertools import izip_longest as zip_longest
+
+register = template.Library()
+
+@stringfilter
+@register.filter(name='escape_quotes')
+def escape_quotes(value):
+    if type(value) != str:
+        value = value.decode("utf-8")
+    escape_single_quotes = value.replace("'", "\\'")
+    escape_single_and_double_quotes = escape_single_quotes.replace('"', '\\"')
+
+    return escape_single_and_double_quotes
+
+@register.filter(name='zip')
+def zip_longest_out(a, b):
+    return zip_longest(a, b)
+
+@register.simple_tag
+def get_testcase_error(error_list, expected_output):
+    tc_error = None
+    success= False
+    for error in error_list:
+        if expected_output.split("\r\n") == error.get("expected_output"):
+            tc_error = error
+            success = True
+    return {"tc_error":tc_error, "success":success}
+
+@register.simple_tag
+def get_review_status(question, user):
+    try:
+        review_status = question.reviews.get(reviewer=user).status
+    except:
+        review_status = False
+    return review_status
diff --git a/interface/views.py b/interface/views.py
index e48366e..f11d7f2 100644
--- a/interface/views.py
+++ b/interface/views.py
@@ -1,22 +1,42 @@
-from interface.models import Question, MultipleChoiceQuestion, CodeQuestion, Choice, TestCase, Rating, Review, Input, Output
-from django.shortcuts import render,get_object_or_404
-from django.http import HttpResponse,HttpResponseRedirect
-from forms import *
+from interface.models import (Question, TestCase, StdIOBasedTestCase,
+                              AverageRating, Review, QuestionBank)
+from yaksh.settings import CODESERVER_HOSTNAME,CODESERVER_PORT
+from interface.forms import (RegistrationForm, QuestionForm,
+                             SkipForm, ReviewForm
+                             )
+from django.shortcuts import render, redirect
+from django.http import HttpResponseRedirect, Http404
+from django.forms.models import inlineformset_factory
+from django.db.models import Q
 from django.core.urlresolvers import reverse
+from django.contrib import messages
 from django.contrib.auth.decorators import login_required
-from django.contrib.auth import logout,login
-from django.views.decorators.csrf import csrf_protect
+from django.contrib.auth import logout
+from django.contrib.auth.models import User, Group
 from django.shortcuts import render_to_response
 from django.template import RequestContext
-from random import choice
+from urllib.parse import urljoin
+import requests
+import json
+import random
 
-def show_home(request):  
-	
-	if request.user.is_authenticated():  
-		return HttpResponseRedirect(reverse('next_login'))
-	else:
-		return render(request, 'home.html', {'type':'guest'})
-		
+
+def is_moderator(user):
+    """Check if the user is in the moderator group"""
+    if user.groups.filter(name='moderator').exists():
+        return True
+
+def is_reviewer(user):
+    """Check if the user is in the reviewer group"""
+    if user.groups.filter(name='reviewer').exists():
+        return True
+
+def show_home(request):
+    if request.user.is_authenticated():  
+        return HttpResponseRedirect(reverse('next_login'))
+    else:
+        return render(request, 'home.html')
+        
 def register(request):
     if request.method == 'POST':
         form = RegistrationForm(request.POST)
@@ -26,672 +46,343 @@ def register(request):
             password=form.cleaned_data['password1'],
             email=form.cleaned_data['email']
             )
-            return render(request,'notice.html',{'notice':"<b>Thank you !</b> Your registration success.<br /> <a href=\"/login\" >Login</a>"})
+            group = Group.objects.filter(name="reviewer")
+            if group.exists():
+                user.groups.add(*group)
+            messages.add_message(request, messages.SUCCESS,
+                                 """<b>You have successfully registered!</b>
+                                 You can login now.
+                                 """)
     else:
         form = RegistrationForm()
     variables = RequestContext(request, {'form': form})
  
-    return render_to_response('registration/register.html', variables)
-
-def register_success(request):
-    return render_to_response('registration/success.html')
+    return render_to_response('register.html', variables)
  
 def logout_page(request):
     logout(request)
-    return HttpResponseRedirect(reverse('login'))	
-	
-def show_questions_stu(request):
-	if request.user.is_authenticated():
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			return HttpResponseRedirect(reverse('next_login'))
-		else:                 
-			questions = Question.objects.all()
-			context = {
-				"questions" : questions,
-			          }
-			return render(request, "display_questions.html", context)
-	else:
-		return HttpResponseRedirect(reverse('login'))
-
-def show_questions_mod_mcq(request):
-
-	if request.user.is_authenticated():
-
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			questions = MultipleChoiceQuestion.objects.filter(status=0).order_by('-avg_rating')
-			context = {
-				"title" : "Unapproved Multiple Choice Questions",
-				"questions" : questions,
-			          }
-			return render(request, "display_questions_mod.html", context)
-		else:                 
-			return HttpResponseRedirect(reverse('next_login'))
-	else:
-		return HttpResponseRedirect(reverse('login'))
-
-def show_questions_mod_approved_mcq(request):
-
-	if request.user.is_authenticated():
-		
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			questions = MultipleChoiceQuestion.objects.filter(status=1).order_by('-avg_rating')
-			context = {
-				"title" : "Approved Multiple Choice Questions",
-				"questions" : questions,
-			          }
-			return render(request, "display_questions_mod.html", context)
-		else:                 
-			return HttpResponseRedirect(reverse('next_login'))
-	else:
-		return HttpResponseRedirect(reverse('login'))
-
-def show_questions_mod_all(request):
-	
-	if request.user.is_authenticated():
-		
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			questions = Question.objects.all().order_by('-avg_rating')
-			context = {
-				"title" : "All Questions",
-				"questions" : questions,
-			          }
-			return render(request, "display_questions_mod.html", context)
-		else:                 
-			return HttpResponseRedirect(reverse('next_login'))
-	else:
-		return HttpResponseRedirect(reverse('login'))
-
-def show_questions_mod_cq(request):
-
-	if request.user.is_authenticated():
-		
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			questions = CodeQuestion.objects.filter(status=0).order_by('-avg_rating')
-			context = {
-				"title" : "Unapproved Code Questions",
-				"questions" : questions,
-			          }
-			return render(request, "display_questions_mod.html", context)
-		else:                 
-			return HttpResponseRedirect(reverse('next_login'))
-	else:
-		return HttpResponseRedirect(reverse('login'))
-
-def show_questions_mod_approved_cq(request):
-
-	if request.user.is_authenticated():
-		
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			questions = CodeQuestion.objects.filter(status=1).order_by('-avg_rating')
-			context = {
-				"title" : "Approved Code Questions",
-				"questions" : questions,
-			          }
-			return render(request, "display_questions_mod.html", context)
-		else:                 
-			return HttpResponseRedirect(reverse('next_login'))
-	else:
-		return HttpResponseRedirect(reverse('login'))
-
-
-def base(request):
-
-	return render(request,'navigation.html')
-
-def add_mcquestion(request):
-
-	if request.user.is_authenticated():
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			return HttpResponseRedirect(reverse('next_login'))
-		if request.POST:
-			form = MultipleChoiceQuestionForm(request.POST)
-			if form.is_valid():
-				instance = form.save()
-				instance.user=request.user
-				instance.save()
-			else:
-				return render(request, "add_mcquestion.html", {"form": form })
-
-			no_of_inputs = request.POST.get('no_of_inputs')
-			
-			for i in range(1, int(no_of_inputs)+1):
-				choice_text = request.POST.get('choice'+ str(i))
-				choice_correct = request.POST.get('correct'+ str(i))
-				if (choice_correct==None):
-						choice_correct = False
-				new_choice = Choice(text=choice_text, question=instance, correct=choice_correct);
-				new_choice.save()
-	    
-			return HttpResponseRedirect(reverse('add_cq'))
-		else:
-			form = MultipleChoiceQuestionForm()
-			return render(request, "add_mcquestion.html", {"form": form })
-	else:
-		return HttpResponseRedirect(reverse('login'))
-
-def add_cquestion(request):
-
-	if request.user.is_authenticated():
-		if request.POST:
-			groups = request.user.groups.values_list('name', flat=True)
-			if ('admin' in groups or 'moderator' in groups):   
-				return HttpResponseRedirect(reverse('mod_show'))
-			form = CodeQuestionForm(request.POST)
-			if form.is_valid():
-				instance = form.save()
-				instance.user = request.user
-				instance.save()
-			else:
-				return render(request, "add_cquestion.html", {"form": form }) 
-			no_of_testcases = request.POST.get('no_of_testcases')
-
-			inputs = request.POST.get('no_of_inputs')
-			outputs = request.POST.get('no_of_outputs')
-			for i in range(1, int(no_of_testcases)+1):
-				testcase = TestCase(no_of_inputs=inputs, no_of_outputs=outputs, question=instance)
-				testcase.save()
-				for j in range(1,int(inputs)+1):
-					ts_type = request.POST.get('testcase'+str(i)+'_input_'+str(j)+'_type')
-					ts_value = request.POST.get('testcase'+str(i)+'_input_'+str(j)+'_value')
-					input_instance = Input(_type=ts_type, value=ts_value, test_cases=testcase)
-					input_instance.save()
-
-				for j in range(1,int(outputs)+1):
-					ts_type = request.POST.get('testcase'+str(i)+'_output_'+str(j)+'_type')
-					ts_value = request.POST.get('testcase'+str(i)+'_output_'+str(j)+'_value')
-					output_instance =Output(_type=ts_type, value=ts_value, test_cases=testcase)
-					output_instance.save()
-
-			return render(request,'notice.html',{'notice':"Thank you for your contribution."})
-		else:
-			form = CodeQuestionForm()
-			return render(request, "add_cquestion.html", {"form": form})
-	else:
-		return HttpResponseRedirect(reverse('login'))
+    return HttpResponseRedirect(reverse('login'))   
 
+@login_required
 def next_login(request):
+    user = request.user
+    if user.is_authenticated():
+        if not is_moderator(user) and not is_reviewer(user):
+            group = Group.objects.filter(name="reviewer")
+            if group.exists():
+                user.groups.add(*group)
+        if is_reviewer(user):
+            return task_closed(request)
+        if is_moderator(user):
+            return show_review_questions(request)
+        return render(request, 'dashboard.html')
+    else:
+        return render(request, 'home.html')
 
-	if request.user.is_authenticated():
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups): 
-			return render(request, 'dashboard.html', {'type':'moderator', "name":request.user})
-		else:
-			return render(request, 'dashboard.html', {'type':'user', "name":request.user})
-	else:
-		return render(request, 'home.html', {'type':'guest'})
-
-
-def approve_questions(request,id=None):
-
-	question = get_object_or_404(Question,pk=id)
-	questions = Question.objects.filter(id=id) 
-	ratings_empty = True
-	reviews_empty = True
-	result_set = []	
-	for ques in questions:
-		ratings = Rating.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Ratings" : ratings,
-		                }
-		result_set.append(question_dict)
-		if (ratings):
-			ratings_empty = False
-	questions = Question.objects.filter(id=id)
-
-	result_set2 = []	
-	for ques in questions:
-		reviews = Review.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Reviews" : reviews}
-		result_set2.append(question_dict)
-		if (reviews):
-			reviews_empty=False
-
-	questions = MultipleChoiceQuestion.objects.filter(id=id)
-	result_set3 = []
-	for ques in questions: 
-		choices = Choice.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Choices" : choices,
-		                }
-		result_set3.append(question_dict)
-
-	questions = CodeQuestion.objects.filter(id=id)
- 	result_set4 = []
-	for ques in questions:
-		testcases = TestCase.objects.filter(question=ques)
-		each_test = []
-		for each_testcase in testcases:
-			inputs = Input.objects.filter(test_cases=each_testcase)
-			outputs = Output.objects.filter(test_cases=each_testcase)
-			testcase = {
-				"input":inputs,
-				"output":outputs,
-				 }
-			each_test.append(testcase)
-		question_dict = {
-		"Question" : ques,
-		"Testcases" : each_test,
-		}
-		
-		result_set4.append(question_dict)
-	context = {
-		
-		"question_ratings" : result_set,
-		"question_reviews" : result_set2,
-		"question_choices" : result_set3,
-		"question_testcases" : result_set4,
-		'question' : question,
-		'ratings_empty':ratings_empty,
-		'reviews_empty':reviews_empty,
-	  		  }
-
-	return render(request, "moderator.html", context)
-
-def approve_questions_accept(request,id=None):
-
-	question = get_object_or_404(Question,pk=id)
-	if question.status==1:
-		question.status=0
-	else:
-		question.approve()
-	question.save()
-	return HttpResponseRedirect("../")	
-
-def show_reviews(request):	
-
-	questions = Question.objects.all()
-	result_set = []	
-	for ques in questions:
-		reviews = Review.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Reviews" : reviews,
-		                }
-		result_set.append(question_dict)
-	context = {
-		"question_reviews" : result_set,
-	          }
-	return render(request, "display_review.html", context)
-	
-def show_ratings(request):
-
-	questions = Question.objects.all()
-	result_set = []	
-	for ques in questions:
-		ratings = Rating.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Ratings" : ratings,
-		                }
-		result_set.append(question_dict)
-	context = { 
-		"question_ratings" : result_set,
-	          }
-
-	return render(request, "display_rating.html", context)
-
-def add_comment(request,id):
-	
-	question = get_object_or_404(Question,pk=id)
-	questions = Question.objects.filter(id=id)
-	ratings_empty=True
-	reviews_empty=True
-	result_set = []	
-	for ques in questions:
-		reviews = Review.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Reviews" : reviews,
-		                }
-		result_set.append(question_dict)
-		if (reviews):
-			reviews_empty=False
-
-	questions = Question.objects.filter(id=id)
-	result_set2 = []	
-	for ques in questions:
-		ratings = Rating.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Ratings" : ratings,
-		                }
-		result_set2.append(question_dict)
-		if (ratings):
-			ratings_empty=False
-	questions = MultipleChoiceQuestion.objects.filter(id=id)
-	result_set3 = []
-	for ques in questions: 
-		choices = Choice.objects.filter(question=ques)
-		question_dict = {
-			"Question" : ques,
-			"Choices" : choices,
-		                }
-		result_set3.append(question_dict)
-
-	questions = CodeQuestion.objects.filter(id=id)
- 	result_set4 = []
-	for ques in questions:
-		testcases = TestCase.objects.filter(question=ques)
-		each_test = []
-		for each_testcase in testcases:
-			inputs = Input.objects.filter(test_cases=each_testcase)
-			outputs = Output.objects.filter(test_cases=each_testcase)
-			testcase = {
-				"input":inputs,
-				"output":outputs,
-				 }
-			each_test.append(testcase)
-		question_dict = {
-		"Question" : ques,
-		"Testcases" : each_test,
-		}
-		
-		result_set4.append(question_dict)
-	
-	context = { 
-
-		"question_reviews" : result_set,
-		"question_ratings" : result_set2,
-		"question_choices" : result_set3,
-		"question_testcases" : result_set4,
-		'question' : question ,
-		'ratings_empty':ratings_empty,
-		'reviews_empty':reviews_empty,
-	 		       }
-
-
-	return render(request,'student.html', context)
-
-def post_comment(request,id):
-
-	if request.POST and request.user.is_authenticated():
-		comment = request.POST.get("content")
-		rating = request.POST.get("rating")
-		user_type=request.POST.get("type")
-		rate_type=request.POST.get("rate_type")
-		user=request.user.id
-		question = get_object_or_404(Question,pk=id)
-		if (user_type=='moderator'):
-			instance = Review(reviewer_id=user, question=question, comments=comment)
-			instance.save()
-			return HttpResponseRedirect("../")
-		try:
-			instance = get_object_or_404(Review, reviewer=user, question=id)
-			return render(request,'notice.html',{'notice':"<b>Sorry !</b> You have already commented on this question.<br /><a href=\"../\" >Go back</a>"})
-			
-		except Exception, e:
-			try:
-				instance = get_object_or_404(Rating, user=user, question=id)
-				return render(request,'notice.html',{'notice':"<b>Sorry !</b> You have already rated this question.<br /> <a href='../'>Go back</a>"})
-			except Exception, e:
-				
-				instance = Rating(user_id=user, question=question, rate=rating)
-				instance.save()
-				instance = Review(reviewer_id=user, question=question, comments=comment)
-				instance.save()
-				if (rate_type=='rate_mcq'):
-					return HttpResponseRedirect(reverse('rate_cq'))
-				elif (rate_type=='rate_cq'):
-					return HttpResponseRedirect(reverse('add_mcq'))
-				return render(request,'notice.html', {'notice':"<b>Thank you !</b> You have rated this question.<br /> <a href=\"../\" >Go back</a>"})
-				
-
-	else:
-		return HttpResponseRedirect("../")
-
-def rate_post(request):
-
-	if request.POST and request.user.is_authenticated():
-		id = request.POST.get("id")
-		comment = request.POST.get("content")
-		rating = request.POST.get("rating")
-		user_type = request.POST.get("type")
-		rate_type = request.POST.get("rate_type")
-		user = request.user.id
-		try:
-			instance = get_object_or_404(Review, reviewer=user,question=id)
-			return render(request,'notice.html',{'notice':"<b>Sorry !</b> You have already commented on this question.<br /><a href=\"/\" >Go back</a>"})
-			
-		except Exception, e:
-			try:
-				instance = get_object_or_404(Rating, user=user,question=id)
-				return render(request,'notice.html',{'notice':"<b>Sorry !</b> You have already rated this question.<br /> <a href='/'>Go back</a>"})
-			except Exception, e:
-				question = get_object_or_404(Question,pk=id)
-				if (user_type!='moderator'):
-					instance = Rating(user_id=user,question=question,rate=rating)
-					instance.save()
-
-					total_rating = 0
-					count = 0
-					for rating in Rating.objects.filter(question=question):
-						count+=1
-						total_rating+=rating.rate
-					if (count>0):
-						question.avg_rating = (total_rating/count)
-					else:
-						question.avg_rating = 0
-					question.save()
-
-				instance = Review(reviewer_id=user, question=question, comments=comment)
-				instance.save()
-				if (rate_type=='rate_mcq'):
-					return HttpResponseRedirect(reverse('rate_cq'))
-				elif (rate_type=='rate_cq'):
-					return HttpResponseRedirect(reverse('add_mcq'))
-				return render(request,'notice.html',{'notice':"<b>Thank you !</b> You have rated this question.<br /> <a href=\"/\" >Go back</a>"})
-				
-	else:
-		return HttpResponseRedirect("../")
-	
-def rate_mcq(request):
-
-	if request.user.is_authenticated():
-		groups=request.user.groups.values_list('name',flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			return HttpResponseRedirect(reverse('home'))
-		else:                 
-			questions = MultipleChoiceQuestion.objects.all()
-			flag = False
-			ratings_empty = True
-			reviews_empty = True
-			for each in questions:
-				try:
-					get_object_or_404(Rating,user=request.user,question=each)
-				except Exception:
-					flag=True
-					break
-			if flag==True:
-				while True:
-					random_que = choice(questions)
-					try:
-						get_object_or_404(Rating, user=request.user, question=random_que)
-					except Exception:
-						break
-				id = random_que.id
-				question = get_object_or_404(Question, pk=id)
-				questions = Question.objects.filter(id=id)
-				result_set = []	
-				for ques in questions:
-					reviews = Review.objects.filter(question=ques)
-					question_dict = {
-						"Question" : ques,
-						"Reviews" : reviews,
-					                }
-					if (reviews):
-						reviews_empty=False
-					result_set.append(question_dict)
-				
-
-				questions = Question.objects.filter(id=id)
-				result_set2 = []	
-				for ques in questions:
-					ratings = Rating.objects.filter(question=ques)
-					question_dict = {
-						"Question" : ques,
-						"Ratings" : ratings,
-					                }
-					if (ratings):
-						ratings_empty=False
-					result_set2.append(question_dict)
-
-				questions = MultipleChoiceQuestion.objects.filter(id=id)
-				result_set3 = []
-				for ques in questions: 
-					choices = Choice.objects.filter(question=ques)
-					question_dict = {
-						"Question" : ques,
-						"Choices" : choices,
-					                }
-					result_set3.append(question_dict)
-
-				questions = CodeQuestion.objects.filter(id=id)
-			 	result_set4 = []
-				for ques in questions:
-					testcases = TestCase.objects.filter(question=ques)
-					each_test = []
-					for each_testcase in testcases:
-						inputs = Input.objects.filter(test_cases=each_testcase)
-						outputs = Output.objects.filter(test_cases=each_testcase)
-						testcase = {
-							"input":inputs,
-							"output":outputs,
-							 }
-						each_test.append(testcase)
-					question_dict = {
-					"Question" : ques,
-					"Testcases" : each_test,
-					}
-					
-					result_set4.append(question_dict)
-				
-				context = { 
-
-					"question_reviews" : result_set,
-					"question_ratings" : result_set2,
-					"question_choices" : result_set3,
-					"question_testcases" : result_set4,
-					'question' : question ,
-					'rate_type' : 'rate_mcq',
-					'ratings_empty':ratings_empty,
-					'reviews_empty':reviews_empty,
-				 		       }
-				
-				return render(request,'student.html', context)
-			else:
-				#return render(request,'notice.html',{'notice':"<b>Thank you !</b> You have already rated all questions.<br /> <a href=\"../ratecq/\" >Next</a>"})
-				return HttpResponseRedirect(reverse('rate_cq'))
-	else:
-		return render(request, 'home.html',{'type':'guest'})
+@login_required
+def show_all_questions(request):
+    """Show a list of all the questions currently in the database."""
 
-def rate_cq(request):
-	
-	if request.user.is_authenticated():
-		groups = request.user.groups.values_list('name', flat=True)
-		if ('admin' in groups or 'moderator' in groups):   
-			return HttpResponseRedirect(reverse('home'))
-		else:                 
-			questions = CodeQuestion.objects.all()
-			flag = False;
-			ratings_empty = True
-			reviews_empty = True
-			for each in questions:
-				try:
-					get_object_or_404(Rating, user=request.user, question=each)
-				except Exception:
-					flag = True
-					break
-			if flag==True:
-				while True:
-					random_que = choice(questions)
-					try:
-						get_object_or_404(Rating, user=request.user, question=random_que)
-					except Exception:
-						break
-				id = random_que.id
-				question = get_object_or_404(Question,pk=id)
-				questions = Question.objects.filter(id=id)
-				result_set = []	
-				for ques in questions:
-					reviews = Review.objects.filter(question=ques)
-					question_dict = {
-						"Question" : ques,
-						"Reviews" : reviews,
-					                }
-					if (reviews):
-						reviews_empty=False
-					result_set.append(question_dict)
-				
+    user = request.user
+    context = {}
+    if is_reviewer(user) or is_moderator(user):
+        return show_review_questions(request)
+    if request.method == 'POST':
+        if request.POST.get('delete') == 'delete':
+            data = request.POST.getlist('question')
+            if data is not None:
+                questions = Question.objects.filter(id__in=data,
+                                                    user_id=user.id
+                                                    )
+                for question in questions:
+                    question.delete()
+    questions = Question.objects.filter(user_id=user.id)
+    count = questions.count()
+    remaining = 5-count
+    context['remaining'] = remaining
+    context['questions'] = questions
+    return render(request, "showquestions.html", context)
+
+@login_required
+def add_question(request, question_id=None):
+    """Create/edit Questions on the interface"""
+    user = request.user
+    ci = RequestContext(request)
+    if is_reviewer(user):
+        return show_review_questions(request)
+    test_case_type = "stdiobasedtestcase"
+    solution_error, tc_error = [], []
+
+    if Question.objects.filter(user=user).count()>=5 and not question_id:
+        return HttpResponseRedirect(reverse('show_all_questions'))
+    if question_id is None:
+        question = None
+    else:
+        question = Question.objects.get(id=question_id)
+        if not is_moderator(user):
+            if question.user != user:
+                raise Http404("You cannot access this page")
 
-				questions = Question.objects.filter(id=id)
-				result_set2 = []	
-				for ques in questions:
-					ratings = Rating.objects.filter(question=ques)
-					question_dict = {
-						"Question" : ques,
-						"Ratings" : ratings,
-					                }
-					if (ratings):
-						ratings_empty=False
-					result_set2.append(question_dict)
+    if request.method == 'POST':
 
-				questions = MultipleChoiceQuestion.objects.filter(id=id)
-				result_set3 = []
-				for ques in questions: 
-					choices = Choice.objects.filter(question=ques)
-					question_dict = {
-						"Question" : ques,
-						"Choices" : choices,
-					                }
-					result_set3.append(question_dict)
+        qform = QuestionForm(request.POST, instance=question)
+        formsets = []
+        if qform.is_valid():
+            question = qform.save(commit=False)
+            question.user = user
+            question.save()
+            for testcase in TestCase.__subclasses__():
+                formset = inlineformset_factory(Question, testcase, extra=0,
+                                                fields='__all__')
+                formsets.append(formset(
+                    request.POST, instance=question
+                    )
+                )
+            for formset in formsets:
+                if formset.is_valid():
+                    formset.save()
+            result = submit_to_code_server(question.id)
+            if result.get("success"):
+                question.status = True
+                question.save()
+            else:
+                question.status = False
+                question.save()
+                errors = result.get("error")
+                for error in errors:
+                    if error.get("type") == "assertion":
+                        solution_error.append(error)
+                    else:
+                        tc_error.append(error)
+            test_case_type = request.POST.get('case_type', None)
+        else:
+            context = {
+                'qform': qform,
+                'question': question,
+                'formsets': formsets,
+                "solution_error": solution_error,
+                "tc_error": tc_error
+            }
+            return render_to_response(
+                "add_question.html", context, context_instance=ci
+            )
 
-				questions = CodeQuestion.objects.filter(id=id)
-			 	result_set4 = []
-				for ques in questions:
-					testcases = TestCase.objects.filter(question=ques)
-					each_test = []
-					for each_testcase in testcases:
-						inputs = Input.objects.filter(test_cases=each_testcase)
-						outputs = Output.objects.filter(test_cases=each_testcase)
-						testcase = {
-							"input":inputs,
-							"output":outputs,
-							 }
-						each_test.append(testcase)
-					question_dict = {
-					"Question" : ques,
-					"Testcases" : each_test,
-					}
-					
-					result_set4.append(question_dict)
-				
-				context = { 
+    qform = QuestionForm(instance=question)
+    formsets = []
+    for testcase in TestCase.__subclasses__():
+        if test_case_type == testcase.__name__.lower():
+            formset = inlineformset_factory(
+                Question, testcase, extra=1, fields='__all__'
+            )
+        else:
+            formset = inlineformset_factory(
+                Question, testcase, extra=0, fields='__all__'
+            )
+        formsets.append(
+            formset(
+                instance=question,
+                initial=[{'type': test_case_type}]
+            )
+        )
+    context = {'qform': qform, 'question': question,
+               'formsets': formsets, "solution_error":solution_error,
+               "tc_error": tc_error}
 
-					"question_reviews" : result_set,
-					"question_ratings" : result_set2,
-					"question_choices" : result_set3,
-					"question_testcases" : result_set4,
-					'question' : question ,
-					'rate_type' : 'rate_cq',
-					'ratings_empty':ratings_empty,
-					'reviews_empty':reviews_empty,
+    return render_to_response(
+        "add_question.html", context, context_instance=ci
+    )
 
-				 		       }
+def submit_to_code_server(question_id, solution=None):
+    """Check if question solution and testcases are correct."""
 
-				return render(request,'student.html', context)
-			else:
-				#return render(request,'notice.html',{'notice':"<b>Thank you !</b> You have already rated all questions.<br /> <a href=\"../addmcq/\" >next_login</a>"})
-				return HttpResponseRedirect(reverse('add_mcq'))
-	else:
-		return render(request, 'home.html',{'type':'guest'})
\ No newline at end of file
+    question = Question.objects.get(id=question_id)
+    if solution:
+        consolidate_answer = question.consolidate_answer_data(solution)
+    else:
+        consolidate_answer = question.consolidate_answer_data(
+                                      question.solution
+                                      )
+    url = "http://{0}:{1}".format(CODESERVER_HOSTNAME, CODESERVER_PORT)
+    uid = "fellowship" + str(question_id)
+    status = False
+    requests.post(url, data=dict(uid=uid, json_data=consolidate_answer,
+                                 user_dir=""
+                                 )
+                  )
+    while not status:
+        result_state = get_result(url, uid)
+        stat = result_state.get("status") 
+        if stat == "done":
+            status = True
+            result = json.loads(result_state.get('result'))
+            return result
+                
+
+def get_result(url, uid):
+    response = json.loads(requests.get(urljoin(url, uid)).text)
+    return response
+
+
+@login_required
+def show_review_questions(request):
+    user = request.user
+    context = {}
+    context["user"] = user
+    if is_moderator(user):
+        ques_bank,created = QuestionBank.objects.get_or_create(user=user)
+        if ques_bank.question_bank.all().count() < 100:
+            quests = get_moderator_questions(user, ques_bank)
+            ques_bank.question_bank.add(*quests)
+        questions = ques_bank.question_bank.all()
+        status = "moderator"
+    if is_reviewer(user):
+        return task_closed(request)
+        ques_bank,created = QuestionBank.objects.get_or_create(user=user)
+        if ques_bank.question_bank.all().count() < 10:
+            quests = get_reviewer_questions(user, ques_bank)
+            ques_bank.question_bank.add(*quests)
+        questions = ques_bank.question_bank.all()
+        status = "reviewer"
+    for question in questions:
+        rating, stat = AverageRating.objects.get_or_create(question=question)
+        rating.set_average_marks()
+    context['questions'] = questions
+    context['status'] = status
+    return render_to_response(
+        "show_review_questions.html", context
+        )
+
+
+def get_reviewer_questions(user, question_bank):
+    existing_questions = question_bank.question_bank\
+                                      .values_list("id", flat=True)
+    questions = list(Question.objects.all().exclude(
+                                                Q(user=user)
+                                                | Q(status=False)
+                                                | Q(id__in=existing_questions)
+                                                )
+                     )
+    random.shuffle(questions)
+
+    all_questions = questions[:(10-question_bank.question_bank.count())]
+    mod_group = Group.objects.get(name="moderator").user_set.all()\
+                              .values_list("id", flat=True)
+    mod_questions = Question.objects.filter(user_id__in=mod_group)
+    if mod_questions.count() > 0:
+        mod_choice = random.choice(mod_questions)
+        all_questions[-1] = mod_choice
+    return all_questions
+
+
+def get_moderator_questions(user, question_bank):
+    all_questions = []
+    moderators = Group.objects.get(name="moderator")\
+                       .user_set.all().exclude(id=user.id)\
+                       .values_list("id", flat=True)
+    mod_qb = QuestionBank.objects.filter(user_id__in=moderators)
+    for q in mod_qb:
+        user_question = q.question_bank.all().values_list("id", flat=True)
+        all_questions.extend(user_question)
+    if all_questions:
+        remaining = Question.objects.filter(status=True)\
+                             .exclude(id__in=all_questions)
+    else:
+        remaining = Question.objects.filter(status=True)
+    random.shuffle(list(remaining))
+    questions = remaining[:(100-question_bank.question_bank.count())]
+    return questions
+
+@login_required
+def check_question(request, question_id):
+    """Review question on the interface."""
+
+    user = request.user
+    context = {}
+    if not is_reviewer(user) and not is_moderator(user):
+        raise Http404("You are not allowed to view this page.")
+    if is_reviewer(user):
+        return task_closed(request)
+
+    try:
+        question = Question.objects.get(id=question_id)
+        review, created = question.reviews.get_or_create(reviewer=user)
+    except Question.DoesNotExist:
+        raise Http404("The Question you are trying to review doesn't exist.")
+    except Review.MultipleObjectsReturned:
+        review = question.reviews.filter(reviewer=user).order_by("id").last()
+
+    if request.method == 'POST' and 'check' in request.POST:
+        if request.POST.get('answer'):
+            answer = request.POST.get('answer')
+            review.last_answer = answer
+            review.save()
+            result = submit_to_code_server(question_id, answer)
+            if not result.get("success"):
+                context["result"] = result.get("error")
+            elif result.get("success"):
+                review.correct_answer = True
+                review.save()
+                return redirect("/postreview/submit/{0}".format(question.id))
+    elif request.method == 'POST' and 'skip' in request.POST:
+        return redirect("/postreview/skip/{0}".format(question.id))
+
+    context['question'] = question
+    if review.last_answer:
+        context['last_answer'] = review.last_answer.encode('unicode-escape')
+    else:
+        context['last_answer'] = None
+    context['correct_answer'] = review.correct_answer
+    return render(request, "checkquestion.html", context)
+
+@login_required
+def post_review(request, submit, question_id):
+    user = request.user
+    context = {}
+    if is_reviewer(user):
+        return task_closed(request)
+    try:
+        question = Question.objects.get(id=question_id)
+    except Question.DoesNotExist:
+        raise Http404("The Question you are trying to review doesn't exist.")
+    review = question.reviews.filter(reviewer=user).order_by("id").last()
+    if submit=="skip":
+        rform = SkipForm(instance=review)
+        if request.method == 'POST':
+            qform = SkipForm(request.POST, instance=review)
+            if qform.is_valid():
+                question_review = qform.save(commit=False)
+                question_review.skipped = True
+                question_review.status = True
+                question_review.save()
+                return redirect("/dashboard")
+    else:
+        if review.correct_answer:
+            rform = ReviewForm(instance=review)
+            if request.method == 'POST':
+                qform = ReviewForm(request.POST, instance=review)
+                if qform.is_valid():
+                    question_review = qform.save(commit=False)
+                    question_review.skipped = False
+                    question_review.status = True
+                    question_review.reasons_for_skip = None
+                    question_review.save()
+                    return redirect("/dashboard")
+        else:
+            return redirect("/dashboard")
+    context["rform"] = rform
+    context["submit"] = submit
+    context["question"] = question
+    return render(request, "submit_review.html", context)
+
+def task_closed(request):
+    return render(request, "submissions_over.html")
+
+def really_show_all_questions(request):
+    user = request.user
+    context = {}
+    if user.is_superuser:
+        questions = Question.objects.all().distinct()
+        context['questions'] = questions
+        return render(request, "show_review_questions.html", context)
+    else:
+        raise Http404("Not an admin!")
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..a62a015
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,15 @@
+pytest
+python-decouple
+six
+requests
+tornado
+psutil
+invoke==0.21.0
+django==1.9.5
+django-taggit==0.18.1
+pytz==2016.4
+selenium==2.53.6
+coverage
+ruamel.yaml==0.15.23
+markdown==2.6.9
+mysqlclient==1.3.9
diff --git a/templates/add_cquestion.html b/templates/add_cquestion.html
deleted file mode 100644
index 67929b8..0000000
--- a/templates/add_cquestion.html
+++ /dev/null
@@ -1,110 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
- {% endblock %}
-{% block content %}
-	<form method="post" onsubmit="return validateForm();">
-	
-	<h2>Add Code Question</h2>
-	<table id="ok">
-		{{ form.as_table }}
-	<tr><td><b>No of inputs: </b></td><td> <input type="number" id="id_no_of_inputs" name="no_of_inputs"  value="2" /></td></tr>
-	<tr><td><b>No of outpus: </b></td><td> <input type="number" id="id_no_of_outputs" name="no_of_outputs"  value="2" /></td></tr>
-	<tr><td><b>No of test cases: </b></td><td> <input type="number" id="id_no_of_testcases" name="no_of_testcases"  value="0" /></td></tr>
-	<tbody id="testcase_container" ></tbody>
-	<tr><td></td><td> <input type="Submit" class="btn btn-primary"value="Submit" /></td></tr>
-	</table>
-	{% csrf_token %}
-	</form>
-
-
-<script src="https://code.jquery.com/jquery-1.7.min.js" integrity="sha256-/05Jde9AMAT4/o5ZAI23rUf1SxDYTHLrkOco0eyRV84=" crossorigin="anonymous"></script>	
-<script type='text/javascript'>
-$(document).ready( function() {
-$('#id_title').on('focus', addFields);
-$('#id_no_of_testcases').on('change', addFields);
-$('#id_no_of_inputs').on('change', addFields);
-$('#id_no_of_outputs').on('change', addFields);
-});
-function addFields(){
-	var ch = document.getElementById("id_no_of_testcases").value;
-	var container = document.getElementById("testcase_container");
-	script=""
-	for(var i=1;i<=ch;i++){
-		script+="<tr><td><b>Test Case "+i+"</b></td><td>\n\n<table style='margin-top:20px;margin-bottom:10px;border:1px;'><tbody id='testcase"+i+"_container' ></tbody></table>\n\n</td></tr>"	
-		
-	}
-	container.innerHTML=script;
-	for(var i=1;i<=ch;i++){
-		update_testcase('testcase'+i);
-	}
-	
-};
-function update_testcase(ts_id){
-	var input=document.getElementById("id_no_of_inputs").value;
-	var output=document.getElementById("id_no_of_outputs").value;
-	var container=document.getElementById(ts_id+"_container");
-	max=input;
-	if (output>max){
-		max=output
-	}
-	script=""
-	for (var i=1;i<=max;i++){
-		script+="<tr><td>\n"
-		if (i<=input){
-			script+="\tType: <select name='"+ts_id+"_input_"+i+"_type'><option value='1'>Integer</option><option value='2'>Float</option><option value='3'>String</option><option value='4'>Boolean</option></select><br />\n";
-			script+="\t<input name='"+ts_id+"_input_"+i+"_value' type='text' placeholder='"+ts_id+" input "+i+"'  />\n";
-		}
-		script+="</td><td>\n"
-		if (i<=output){
-			script+="\tType: <select name='"+ts_id+"_output_"+i+"_type'><option value='1'>Integer</option><option value='2'>Float</option><option value='3'>String</option><option value='4'>Boolean</option></select><br />\n";
-			script+="\t<input name='"+ts_id+"_output_"+i+"_value' type='text' placeholder='"+ts_id+" output "+i+"'/>\n";
-		}
-		script+="</td></tr>\n"
-	}
-	container.innerHTML=script;
-
-};
-function validateForm(){
-			title =  document.getElementById("id_title").value;
-			if (title==""){
-				alert("Enter question title");
-				return false;
-			}
-			
-			function_name = document.getElementById("id_function_name").value;
-			if (function_name==""){
-				alert("Enter function name");
-				return false;
-			}
-			marks = document.getElementById("id_marks").value;
-			if (marks<0){
-				alert("Marks should be positive");
-				return false;
-			}
-			no_of_inputs = document.getElementById("id_no_of_testcases").value;
-			if (no_of_inputs<0){
-				alert("No of testcases should be positive");
-				return false;
-			}
-			count = 0;
-			for(var i=1;i<=no_of_inputs;i++){
-				input_text=document.getElementById("testcase"+i+"_input").value;
-				if (input_text<1){
-					alert("Enter valid input for testcase "+i);
-					return false;
-				}
-				output_text=document.getElementById("testcase"+i+"_output").value;
-				if (output_text<1){
-					alert("Enter valid output for testcase "+i);
-					return false;
-				}
-			}
-			
-}
-</script>
-
-
-{% endblock %}
\ No newline at end of file
diff --git a/templates/add_cquestion_old.html b/templates/add_cquestion_old.html
deleted file mode 100644
index 851c4b2..0000000
--- a/templates/add_cquestion_old.html
+++ /dev/null
@@ -1,102 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
- {% endblock %}
-{% block content %}
-	<form method="post" onsubmit="return validateForm();">
-	
-	<h2>Add Code Question</h2>
-	<table id="ok">
-		{{ form.as_table }}
-	<tr><td><b>No of test cases: </b></td><td> <input type="number" id="id_no_of_testcases" name="no_of_testcases"  value="0" /></td></tr>
-	<tbody id="testcase_container" ></tbody>
-	<tr><td></td><td> <input type="Submit" class="btn btn-primary"value="Submit" /></td></tr>
-	</table>
-	{% csrf_token %}
-	</form>
-
-
-<script src="https://code.jquery.com/jquery-1.7.min.js" integrity="sha256-/05Jde9AMAT4/o5ZAI23rUf1SxDYTHLrkOco0eyRV84=" crossorigin="anonymous"></script>	
-<script type='text/javascript'>
-$(document).ready( function() {
-$('#id_title').on('focus', addFields);
-$('#id_no_of_testcases').on('change', addFields);
-});
-function addFields(){
-	var ch = document.getElementById("id_no_of_testcases").value;
-	var container = document.getElementById("testcase_container");
-	script=""
-	for(var i=1;i<=ch;i++){
-		script+="<tr><td><b>Test Case "+i+"</b></td><td>\n\n<table><tr><td>  <input type='number' id='testcase"+i+"_input' onchange=\"update_testcase('testcase"+i+"');\" name='testcase"+i+"_input' value=0 placeholder='Testcase "+i+" input' /></td>\n<td>  <input type='number' id='testcase"+i+"_output' value=0 onchange=\"update_testcase('testcase"+i+"');\" name='testcase"+i+"_output' placeholder='Testcase "+i+" output' /> </td></tr> <tbody id='testcase"+i+"_container' ></tbody></table>\n\n</td></tr>\n"
-	}
-	container.innerHTML=script;
-};
-function update_testcase(ts_id){
-	var input=document.getElementById(ts_id+"_input").value;
-	var output=document.getElementById(ts_id+"_output").value;
-	var container=document.getElementById(ts_id+"_container");
-	max=input;
-	if (output>max){
-		max=output
-	}
-	script=""
-	console.log(max);
-	for (var i=1;i<=max;i++){
-		script+="<tr><td>\n"
-		if (i<=input){
-			script+="\tType: <select name='"+ts_id+"_input_"+i+"_type'><option value='1'>Integer</option><option value='2'>Float</option><option value='3'>String</option><option value='4'>Boolean</option></select><br />\n";
-			script+="\t<input name='"+ts_id+"_input_"+i+"_value' type='text' placeholder='"+ts_id+" input "+i+"'  />\n";
-		}
-		script+="</td><td>\n"
-		if (i<=output){
-			script+="\tType: <select name='"+ts_id+"_output_"+i+"_type'><option value='1'>Integer</option><option value='2'>Float</option><option value='3'>String</option><option value='4'>Boolean</option></select><br />\n";
-			script+="\t<input name='"+ts_id+"_output_"+i+"_value' type='text' placeholder='"+ts_id+" output "+i+"'/>\n";
-		}
-		script+="</td></tr>\n"
-	}
-	container.innerHTML=script;
-	//alert(script);
-};
-function validateForm(){
-			title =  document.getElementById("id_title").value;
-			if (title==""){
-				alert("Enter question title");
-				return false;
-			}
-			
-			function_name = document.getElementById("id_function_name").value;
-			if (function_name==""){
-				alert("Enter function name");
-				return false;
-			}
-			marks = document.getElementById("id_marks").value;
-			if (marks<0){
-				alert("Marks should be positive");
-				return false;
-			}
-			no_of_inputs = document.getElementById("id_no_of_testcases").value;
-			if (no_of_inputs<0){
-				alert("No of testcases should be positive");
-				return false;
-			}
-			count = 0;
-			for(var i=1;i<=no_of_inputs;i++){
-				input_text=document.getElementById("testcase"+i+"_input").value;
-				if (input_text<1){
-					alert("Enter valid input for testcase "+i);
-					return false;
-				}
-				output_text=document.getElementById("testcase"+i+"_output").value;
-				if (output_text<1){
-					alert("Enter valid output for testcase "+i);
-					return false;
-				}
-			}
-			
-}
-</script>
-
-
-{% endblock %}
\ No newline at end of file
diff --git a/templates/add_mcquestion.html b/templates/add_mcquestion.html
deleted file mode 100644
index e2a20b1..0000000
--- a/templates/add_mcquestion.html
+++ /dev/null
@@ -1,110 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
- {% endblock %}
-{% block content %}
-
-	<form method="post" onsubmit="return validateForm();" onpageshow="addFields();">
-	<h2>Add Multiple Choice Question</h2>
-	<table id="ok">
-	{{form.as_table}}
-	</table>
-
-	<script
-			  src="https://code.jquery.com/jquery-1.7.min.js"
-			  integrity="sha256-/05Jde9AMAT4/o5ZAI23rUf1SxDYTHLrkOco0eyRV84="
-			  crossorigin="anonymous"></script>	
-				<script type='text/javascript'>
-				$(document).ready( function() {
-					console.log("eef")
-    				$('#id_no_of_inputs').on('change', addFields);
-    				$('#id_title').on('focus', addFields);
-				function addFields(){
-
-				var ch = document.getElementById("id_no_of_inputs").value;
-
-				var container = document.getElementById("choice_container");
-
-				while (container.hasChildNodes()) {
-				container.removeChild(container.lastChild);
-				}
-				for (i=1;i<=ch;i++){
-
-				container.appendChild(document.createTextNode("Choice"+(i)));
-
-				var input = document.createElement("input");
-				input.type = "text";
-				input.name = "choice" + i;
-				input.id ="choice"+i;
-				input.required;
-				container.appendChild(input);
-				var input = document.createElement("input");
-				input.type = "checkbox";
-				input.value="True";
-				input.name = "correct" + i;
-				input.id ="correct"+i;
-				input.required;
-				container.appendChild(input);
-
-				container.appendChild(document.createElement("br"));
-				}
-				document.getElementById("choice_container").innerHTML=container.innerHTML;
-				}
-
-			});
-
-				</script>
-	<div id="choice_container" >
-		
-	</div><br /><br />
-		{% csrf_token %}
-
-	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" class="btn btn-primary" value="Submit" /></td></tr>
-
-	</form>
-	<script type="text/javascript">
-		function validateForm(){
-					title =  document.getElementById("id_title").value;
-					if (title==""){
-						alert("Enter question title");
-						return false;
-					}
-					text = document.getElementById("id_text").value;
-					if (text==""){
-						alert("Enter question text");
-						return false;
-					}
-					marks = document.getElementById("id_marks").value;
-					if (marks<0){
-						alert("Marks should be positive");
-						return false;
-					}
-					no_of_inputs = document.getElementById("id_no_of_inputs").value;
-					if (no_of_inputs<0){
-						alert("No of inputs should be positive");
-						return false;
-					}
-					count = 0;
-					for(var i=1;i<=no_of_inputs;i++){
-						choice_text=document.getElementById("choice"+i).value;
-						if (choice_text==""){
-							alert("Enter choice "+i);
-							return false;
-						}
-						if (document.getElementById("correct"+i).checked)
-							count++;
-					}
-					if (count==0){
-						alert("Choose atleast one correct option");
-						return false;
-					}
-					
-		}
-	</script>
-
-  {% endblock %}
-
-
-
diff --git a/templates/base.html b/templates/base.html
deleted file mode 100644
index 6ba7f32..0000000
--- a/templates/base.html
+++ /dev/null
@@ -1,13 +0,0 @@
-<!DOCTYPE>
-<html>
-    <head>
-    {% load staticfiles %}
-        <title>Django Login Application |
-        {% block title %}{% endblock %}</title>
-    </head>
-    <body>
-        <h1>{% block head %}{% endblock %}</h1>
-        {% block content %}{% endblock %}
- 
-    </body>
-</html>
\ No newline at end of file
diff --git a/templates/dashboard.html b/templates/dashboard.html
deleted file mode 100644
index 3a82d01..0000000
--- a/templates/dashboard.html
+++ /dev/null
@@ -1,66 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-{% ifequal type 'guest' %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'login' %}">Login</a></li>
-<li><a href="{% url 'register_page' %}">Signup</a></li>
-{% endifequal %}
-{% ifequal type 'user' %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
-{% endifequal %}
-{% ifequal type 'moderator' %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li class="dropdown">
-<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Show Questions <span class="caret"></span></a>
-<ul class="dropdown-menu">
-<li><a href="{% url 'mod_show_mcq' %}" >Unapproved MCQ</a></li>
-<li><a href="{% url 'mod_show_cq' %}" >Unapproved CQ</a></li>
-<li><a href="{% url 'mod_show_approved_mcq' %}">Approved MCQ</a></li>
-<li><a href="{% url 'mod_show_approved_cq' %}">Approved CQ</a></li>
-</ul>
-</li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
-{% endifequal %}
-{% endblock %}
-
-{% block content %}
-
-
-
-<html lang="en">
-<head>
-
-</head>
-
-<div class="container">
-
-  <br><br>
-  <h1>Welcome {{name}}</h1><br/>
-  <p>
-  {% ifequal type 'user' %}
-  You can contribute questions here by clicking on Start Contribution.
-  Before that You should rate one multiple choice question and one code question.<br/> <br /><a href="{% url 'rate_mcq' %}" />Start Contribution</a>
-  {% endifequal %}
-  {% ifequal type 'moderator' %}
-  You can comment and approve questions here
-  <ul>
-<li>All Questions: <a href="{% url 'mod_show_all' %}" >Click here</a></li>
-<li>Unapproved MCQ: <a href="{% url 'mod_show_mcq' %}" >Click here</a></li>
-<li>Unapproved CQ: <a href="{% url 'mod_show_cq' %}" >Click here</a></li>
-<li>Approved MCQ: <a href="{% url 'mod_show_approved_mcq' %}">Click here</a></li>
-<li>Approved CQ: <a href="{% url 'mod_show_approved_cq' %}">Click here</a></li>
-</ul>
-  <a href=""
-  {% endifequal %}
-  </p>
-
-
- 
-  </center>
-</div>
-
-</body>
-</html>
-{% endblock %}
\ No newline at end of file
diff --git a/templates/display_questions.html b/templates/display_questions.html
deleted file mode 100755
index 1b60710..0000000
--- a/templates/display_questions.html
+++ /dev/null
@@ -1,28 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
- {% endblock %}
-{% block content %}
-<html>
-<head>
-	<title> Yaksh</title>
-</head>
-<body>
-	<h2>List of Questions: </h2>
-
-
-	<ul>
-	{% for each in questions %}
-		<li>
-		<a href="{{each.id }}" >{{ each.text }}</a>	
-		
-		</li>
-
-	{% endfor %}
-
-	</ul>
-</body>
-</html>
-{% endblock %}
diff --git a/templates/display_questions_mod.html b/templates/display_questions_mod.html
deleted file mode 100755
index c66b611..0000000
--- a/templates/display_questions_mod.html
+++ /dev/null
@@ -1,34 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li class="dropdown">
-<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Show Questions <span class="caret"></span></a>
-<ul class="dropdown-menu">
-<li><a href="{% url 'mod_show_mcq' %}" >Unapproved MCQ</a></li>
-<li><a href="{% url 'mod_show_cq' %}" >Unapproved CQ</a></li>
-<li><a href="{% url 'mod_show_approved_mcq' %}">Approved MCQ</a></li>
-<li><a href="{% url 'mod_show_approved_cq' %}">Approved CQ</a></li>
-</ul>
-</li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
- {% endblock %}
-{% block content %}
-<html>
-<head>
-	<title> Yaksh</title>
-</head>
-<body>
-	<h3>{{ title }}</h3>
-	<ul>
-	{% for each in questions %}
-		<li>
-		<a href="../{{each.id }}" >{{ each.text }}</a>	
-		
-		</li>
-
-	{% endfor %}
-
-	</ul>
-</body>
-</html>
-{% endblock %}
diff --git a/templates/display_rating.html b/templates/display_rating.html
deleted file mode 100644
index 0c9a28d..0000000
--- a/templates/display_rating.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title> Yaksh | {{ title }}</title>
-</head>
-<body>
-	<ul>
-	{% for each in question_ratings %}
-		
-		<li>
-		{{ each.Question.text }}
-		<ul>
-		{% for each_rating in each.Ratings %}
-			<li> 
-			
-			{{ each_rating.rate }} by {{ each_rating.user }}
-			
-
-			
-			</li>
-		{% endfor %}
-		</ul>
-		</li>
-
-	{% endfor %}
-
-	</ul>
-</body>
-</html>
diff --git a/templates/display_review.html b/templates/display_review.html
deleted file mode 100755
index 89f630c..0000000
--- a/templates/display_review.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title> Yaksh | {{ title }}</title>
-</head>
-<body>
-	<ul>
-	{% for each in question_reviews %}
-		
-		<li>
-		{{ each.Question.text }}
-		<ul>
-		{% for each_review in each.Reviews %}
-			<li> 
-			
-			{{ each_review.comments}} by {{ each_review.reviewer }}
-			
-
-			
-			</li>
-		{% endfor %}
-		</ul>
-		</li>
-
-	{% endfor %}
-
-	</ul>
-</body>
-</html>
diff --git a/templates/home.html b/templates/home.html
deleted file mode 100644
index 74c3ae5..0000000
--- a/templates/home.html
+++ /dev/null
@@ -1,48 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-{% ifequal type 'guest' %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'login' %}">Login</a></li>
-<li><a href="{% url 'register_page' %}">Signup</a></li>
-{% endifequal %}
-{% ifequal type 'user' %}
-<li class="active"><a href="{% url 'next_login' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
-{% endifequal %}
-{% ifequal type 'moderator' %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li class="dropdown">
-<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Show Questions <span class="caret"></span></a>
-<ul class="dropdown-menu">
-<li><a href="{% url 'mod_show_mcq' %}" >Unapproved MCQ</a></li>
-<li><a href="{% url 'mod_show_cq' %}" >Unapproved CQ</a></li>
-<li><a href="{% url 'mod_show_approved_mcq' %}">Approved MCQ</a></li>
-<li><a href="{% url 'mod_show_approved_cq' %}">Approved CQ</a></li>
-</ul>
-</li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
-{% endifequal %}
-{% endblock %}
-
-{% block content %}
-
-
-
-<html lang="en">
-<head>
-
-</head>
-
-<div class="container">
-<center>
-  <br><br>
-  <h1>Welcome to Chethana Question Contribution</h1><br/>
- 
- 
-  </center>
-</div>
-
-</body>
-</html>
-{% endblock %}
\ No newline at end of file
diff --git a/templates/index.html b/templates/index.html
deleted file mode 100755
index e2d9b4a..0000000
--- a/templates/index.html
+++ /dev/null
@@ -1,18 +0,0 @@
-	<!DOCTYPE html>
-<html>
-<head>
-	<title>Yaksh | Home</title>
-</head>
-<body>
-	<h2>Welcome {{ user }}</h2>
-	<ul>
-	<li><a href="questions">Student Interface</a></li>
-	<li><a href="questions">Moderator Interface</a></li>
-	
-	
-		
-	</ul>
-
-
-</body>
-</html>
diff --git a/templates/index3.html b/templates/index3.html
deleted file mode 100644
index 627ec97..0000000
--- a/templates/index3.html
+++ /dev/null
@@ -1,16 +0,0 @@
-	<!DOCTYPE html>
-<html>
-<head>
-	<title>Yaksh | Home</title>
-</head>
-<body>
-	<h2>Welcome {{ user }}</h2>
-	<ul>
-	<li><a href="questions">Student Interface</a></li>
-	
-		
-	</ul>
-
-
-</body>
-</html>
diff --git a/templates/registration/success.html b/templates/registration/success.html
deleted file mode 100644
index 00ebe5e..0000000
--- a/templates/registration/success.html
+++ /dev/null
@@ -1,2 +0,0 @@
-    Thank you for registering.
-    <a href="/">Login</a> 
diff --git a/templates/student.html b/templates/student.html
deleted file mode 100644
index 355c13f..0000000
--- a/templates/student.html
+++ /dev/null
@@ -1,134 +0,0 @@
-{% extends "navigation.html" %}
-{% block navbar %}
-<li class="active"><a href="{% url 'home' %}">Home</a></li>
-<li><a href="{% url 'next_login' %}">Contribution</a></li>
-<li><a href="{% url 'logout_page' %}">Logout</a></li>
- {% endblock %}
-{% block content %}
-
-<h3>Title: {{ question.title|safe }}</h3>
-<b>Creator : </b> {{ question.user }}<br />
-<b>Avg. Rating : </b> {{ question.avg_rating }}<br />
-<h3>Question</h3>
-<ul>
-	{% for each in question_choices %}
-		<li>
-		{{ each.Question.text }}
-		<ul>
-		{% for each_choice in each.Choices %}
-			<li> 
-			
-			{% if each_choice.correct %}
-			<b><u>
-			{% endif %}
-
-			{{ each_choice.text }} 
-
-			</u></b>
-			</li>
-		{% endfor %}
-		</ul>
-		</li>
-
-	{% endfor %}
-
-	</ul>
-
-<ul>
-	{% for each in question_testcases %}
-		<li>
-		{{ each.Question.text }}
-		<ul>
-		
-		{% for testcase in each.Testcases %}
-		<b>Testcase</b>
-		<ul>
-		Input:
-		{% for input in testcase.input %}
-				<li>{{input.value}}</li>
-		{% endfor %}
-		</ul>
-
-		<ul>
-		Output:
-		{% for output in testcase.output %}
-			<li>{{ output.value }}</li>
-		{% endfor %}
-		</ul>
-
-		{% endfor %}
-		
-		
-		</ul>
-		</li>
-
-	{% endfor %}
-
-	</ul>
-<h3>Ratings</h3>
-<ul>
-	{% if ratings_empty %}
-	<li>Not yet rated</li>
-	{% else %}
-	{% for each in question_ratings %}
-		{% for each_rating in each.Ratings %}
-			<li> 
-			{{ each_rating.get_rate_display }} by {{ each_rating.user }}
-			</li>
-		{% endfor %}
-	{% endfor %}
-	{% endif %}
-	</ul>
-<h3>Reviews</h3>
-<ul>
-	{% if reviews_empty %}
-	<li>Not yet reveiwed</li>
-	{% else %}
-	{% for each in question_reviews %}
-		{% for each_review in each.Reviews %}
-			<li> 
-			{{ each_review.comments}} by {{ each_review.reviewer }}
-			</li>
-		{% endfor %}
-	{% endfor %}
-	{% endif %}
-	</ul>
-<h3>Your opinion: </h3>
-<form action="../postcomment/" method="post"  onsubmit="return validate();">
-<input type="hidden" name="id" value="{{ question.id}}" />
-<input type="hidden" name="rate_type" value="{{rate_type}}" />
- <table>
-{% csrf_token %}
-<p>
-Comment:
-<textarea name="content" id="content" cols=20 rows=4></textarea><br/>
-Rating:
-<select name="rating" id="rating">
-<option selected disabled hidden value=0>Select rating</option>
-<option value="1">Poor</option>
-<option value="2">Average</option>
-<option value="3">Good</option>
-<option value="4">Very Good</option>
-<option value="5">Excellent</option>
-</select>
-</p>
-<input type="submit" value="Post" class="btn btn-primary"/>
-</table>
-</form><script type="text/javascript ">
-function validate(){
-	content=document.getElementById("content").value;
-	rating=document.getElementById("rating").value;
-	if (content==""){
-		alert("Please enter review");
-		return false;
-	}
-	else if (rating==0){
-		alert("Please choose rating");
-		return false;
-	}
-	return true;
-}
-</script>
-
-
-{% endblock %}
diff --git a/yaksh/settings.py b/yaksh/settings.py
index fe37783..7f7339b 100644
--- a/yaksh/settings.py
+++ b/yaksh/settings.py
@@ -56,7 +56,7 @@
 TEMPLATES = [
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'DIRS': [os.path.join(BASE_DIR,"templates")],
+        'DIRS': ["interface/static/templates"],
         'APP_DIRS': True,
         'OPTIONS': {
             'context_processors': [
@@ -81,7 +81,17 @@
         'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
     }
 }
-
+# DATABASES = {
+#     'default': {
+#         'ENGINE': 'django.db.backends.mysql',
+#         'NAME': "contribute",
+#         # The following settings are not used with sqlite3:
+#         'USER': "username",
+#         'PASSWORD': "password",
+#         'HOST': 'localhost', # Empty for localhost through domain sockets or '1$
+#         'PORT': 3306,
+#     },
+# }
 
 # Password validation
 # https://docs.djangoproject.com/en/1.9/ref/settings/#auth-password-validators
@@ -120,3 +130,11 @@
 # https://docs.djangoproject.com/en/1.9/howto/static-files/
 
 STATIC_URL = '/static/'
+
+STATIC_ROOT='interface/static/'
+
+LOGIN_URL = "/login/"
+
+CODESERVER_HOSTNAME = "localhost" # Address of the yaksh code server
+
+CODESERVER_PORT = 55555
diff --git a/yaksh/urls.py b/yaksh/urls.py
index 82e37a8..af30ce5 100644
--- a/yaksh/urls.py
+++ b/yaksh/urls.py
@@ -1,39 +1,29 @@
 from django.conf.urls import url, include
 from django.contrib import admin
+from django.contrib.auth import views as auth_views
 from interface.views import *
+
 urlpatterns = [
     url(r'^admin/', admin.site.urls),
-    url(r'^$',"interface.views.show_home",name="home"),
-
-    url(r'^login/$', 'django.contrib.auth.views.login', name="login"), 
-    url(r'^logout/$', "interface.views.logout_page",name="logout_page"), 
-    url(r'^register/$', "interface.views.register", name="register_page"),
-    url(r'^register/success/$', "interface.views.register_success",name="register_success"),    
-    url(r'^dashboard/$',"interface.views.next_login",name="next_login"),
-
-    url(r'^questions/$',"interface.views.show_questions_stu",name="stu_questions"),
-    url(r'^questions/ratemcq/$',"interface.views.rate_mcq",name="rate_mcq"),
-    url(r'^questions/postcomment/$',"interface.views.rate_post",name="rate_post_comment"),
-    url(r'^questions/ratecq/$',"interface.views.rate_cq",name="rate_cq"),
-    url(r'^questions/addmcq/$',"interface.views.add_mcquestion",name="add_mcq"),  
-    url(r'^questions/addcq/$',"interface.views.add_cquestion",name="add_cq"),  
-
-    url(r'^questions/(?P<id>\d+)/$',"interface.views.add_comment",name="question_comment"),
-    url(r'^questions/(?P<id>\d+)/postcomment/$',"interface.views.post_comment",name="question_comment_post"),
-
-    url(r'^moderator/$',"interface.views.next_login",name="mod_show"),
-    url(r'^moderator/all/$',"interface.views.show_questions_mod_all",name="mod_show_all"),
-    url(r'^moderator/mcq/$',"interface.views.show_questions_mod_mcq",name="mod_show_mcq"),
-    url(r'^moderator/cq/$',"interface.views.show_questions_mod_cq",name="mod_show_cq"),
-    url(r'^moderator/mcq_approved/$',"interface.views.show_questions_mod_approved_mcq",name="mod_show_approved_mcq"),
-    url(r'^moderator/cq_approved/$',"interface.views.show_questions_mod_approved_cq",name="mod_show_approved_cq"),
-    url(r'^moderator/(?P<id>\d+)/$',"interface.views.approve_questions",name="mod_questions"),
-    url(r'^moderator/(?P<id>\d+)/approve/$',"interface.views.approve_questions_accept",name="mod_approve"),
-    url(r'^moderator/(?P<id>\d+)/postcomment/$',"interface.views.post_comment",name="mod_approve_posted"),
-                      
-    url(r'^reviews/$',"interface.views.show_reviews",name="show_review"),
-    url(r'^ratings/$',"interface.views.show_ratings",name="show_ratings"),
+    url(r'^$',show_home,name="home"),
 
+    url(r'^login/$', auth_views.login,
+        {'template_name': 'login.html'}, name="login"),
+    url(r'^logout/$', logout_page,name="logout_page"),
+    url(r'^register/$', register, name="register_page"),
+    url(r'^dashboard/$',next_login,name="next_login"),
 
-  
+    url(r'^showquestions/$',show_all_questions,
+        name="show_all_questions"),
+    url(r'^reallyshowquestions/$',really_show_all_questions,
+        name="show_all_questions"),
+    url(r'^addquestion/$',add_question,name="add_question"),
+    url(r'^addquestion/(?P<question_id>\d+)/$',add_question,
+        name="add_question"),
+    url(r'^show_review_questions/$', show_review_questions,
+        name="show_review_questions"),
+    url(r'^checkquestion/(?P<question_id>\d+)/$',
+        check_question,name="check_question"),
+    url(r'^postreview/(?P<submit>skip|submit)/(?P<question_id>\d+)/$',
+        post_review,name="post_review"),
 ]