Working WebGL :)
Added VBO and Shader class.
Started adding textures.
Redesigned the attribute system (which was bullshit before).
Updated some details, added everything new to docu.
Added sprite renderer class.
Rotation seems buggy.

Not updated yet:

- core/Game.js
- graphics/tile/IsoMap.js
- graphics/Keyframe.js
- util/State.js

Add docs for SpriteRenderer.
Removed tons of bugs, updated bb.graphics.
Fixed namespace bug.
Extended docs.
Fixed delta time.
Added subRect to Sprite.
Got Keyframe working again.
IsoMap -> WebGL.