Geometry

[Tjstretchalot]

I'm working on separating-axis-theorem geometry on my fork at the moment. It's going to probably take a few days before it's ready to merge, but my first-pass at the minimum documentation is ready if you want to monitor progress to avoid duplicating work or have any thoughts/concerns.

In order for me to test the documentation I setup my fork through readthedocs as well.

http://pygorithm-fork.readthedocs.io/en/latest/Geometry.html