Moved to the sudoless environment and enabled caching.

Omer Katz · Omer Katz · commit 880663cb932d · 2015-10-27T10:59:42.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,8 @@
 language: python
+sudo: false
+cache:
+  directories:
+    - $HOME/.cache/pip
 python:
   - 2.6
   - 2.7
