Update instructions for pip installation

Platform-Documentation.md

@@ -26,10 +26,13 @@ On Linux and Mac OS we recommend installing and updating cctrl via pip. *cctrl*
 $ sudo pip install -U cctrl
 ~~~
 
-If you don't have pip you can install pip via easy_install (on Linux usually part of the python-setuptools package) and then install cctrl.
+If you don't have pip, you can install it either using packages from
+your distribution or following the instructions in
+[pip documentation](https://pip.pypa.io/en/stable/installing/). For
+example, on Ubuntu, use:
 
 ~~~
-$ sudo easy_install pip
+$ sudo apt-get install python-pip python-dev
 $ sudo pip install -U cctrl
 ~~~
 

Quickstart.md

@@ -20,11 +20,18 @@ Install Git from the [official site](http://git-scm.com/) or your package reposi
 **Linux/Mac OS X:** We recommend installing cctrl via pip.
 
 ~~~bash
-# if you don't have pip yet
-$ sudo easy_install pip
 $ sudo pip install cctrl
 ~~~
 
+If you don't have pip, you can install it either using packages from
+your distribution or following the instructions in
+[pip documentation](https://pip.pypa.io/en/stable/installing/). For
+example, on Ubuntu, use:
+
+~~~bash
+$ sudo apt-get install python-pip python-dev
+~~~
+
 **Windows:** Please download the provided [installer](https://download.cloudcontrolled.com/windows).
 
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