Beginning of the OpenGL device
Implemented bigger part of the OpenGL back-end (#1)
Implemented program and basic mesh creation routines.
Implemented basic drawing routines. Got the sacred triangle to render.
Switched the triangle shader to use the vertex attribute. Cleaned up draw states.
Update to latest rustc
Fix formatting nits
Merge pull request #11 from bjz/opengl

Basic OpenGL back-end with a working triangle example