OpenGL Branch Merged

I have merged my OpenGL branch with my mainline work and I'm beginning to work on level creation, based on simple python scripts.

Current work basically loads the python script and gives a custom environment to access needed carcode functionality, which roughly includes adding entities to Arena, basic prebuild entities and OpenGL functions to create your own entities.

Next steps to improve general usability of level loading should be documenting rendering API, which functions needs to be implemented by and object to implement drawing, collision detection and event handling.

I'm currently using Sphinx to generate documentation from RST files, this system is used for the official python documentation.