Changed pythonStatement and pythonBuiltin to light blue colour (for VIM)

These colours follow the same style from the screenshots.

Before
![before](https://cloud.githubusercontent.com/assets/828125/4470122/f149c90c-491f-11e4-9c6b-e34dcbc801a2.png)

After
![after](https://cloud.githubusercontent.com/assets/828125/4470123/fa098fe6-491f-11e4-9585-13b4f934fec8.png)