Add some code blocks (new feature in docutils 0.9) to test syntax highlighting

[msabramo]

The recently released docutils 0.9 now supports a "code" directive, as described here. If you guys upgrade your docutils to 0.9 and make sure that you have Pygments installed, then you will get this feature for free and that would be awesome to have syntax highlighting in RST documentation.

This pull request adds sample code blocks to the RST files in your tests.

.. code:: python

 def my_function():
     "just a test"
     print 8/2

[dreid]

+1

[tnm]

We've added support for code highlighting in reSt, demonstrated here http://cl.ly/ICei