Cleanup.

I am pedantic crazyass.
Bootstrap text support.
Actually _use_ integral coordinates.
New TextSprite class.

Renders centered text.
Add some example text.
Fix Emscripten build.
Fix buffer binding on Emscripten.
More checks in TextureLoader.
Added README for texture adding and font generating.
Merge branch 'master' of https://github.com/nuclearwhales/rottennoodlessmuggler