Renamed SpriteMap to Texture.
Renamed Rectangle to Rectangle2.
Started working on Sprite class.
CameraLens docs.
Changed Sprite public properties.
Sprite docs.
Texture docs.
Turned Texture into struct.
Created unimplemented GameRenderer class.
A Camera may record another Camera object.
Created GameRendererFrame.
A Camera owns GameRendererFrame objects.
Window has unimplemented render method.