Progress: OpenGL, pyglet, new fluid dynamics, optimization rewrite

Not a lot to show publically, I'm rewriting the engine to make it more optimizable (a big part of this is switching from a Python class for cells to parallel arrays that can be turned into C arrays a lot more easily), and while I'm at it I'm learning pyglet and all about creating vertex lists and loading them into memory.  This, plus the fluid sorting experiment, should provide for much better performance, although it remains to be seen how that will work.  More soon.