v0.4.0

This is a major rewrite of the original engine as I've tried to narrow down it's focus.
Originally I set out to create a game engine, however I've realized it would better serve the community to focus on a generic rendering engine that others could build upon. Game specific things like managing game logic, physics, sounds, etc. came come from other libraries (as they are created).
I think choosing this path will establish a firm foundation for 3D rendering because others won't have to re-invent the wheel.