Adds python syntax highlighting in yellow

This PR fixes #8

Here are some screenshots of it:
![screen shot 1730-10-30 at 11 26 37](https://cloud.githubusercontent.com/assets/2810764/3497404/7b1a249c-05eb-11e4-81b4-aaf1d7bf9007.png)
This shot shows a good amount of the breadth shown in the python syntax.

![screen shot 1730-10-30 at 11 26 06](https://cloud.githubusercontent.com/assets/2810764/3497409/96040e9e-05eb-11e4-8102-e6b8d4e5e3c0.png)
This shot shows a large amount of python's templating (here using Jinja2, but it also works with django templating)

Let me know what you think!