Rearranged renderer code, adding a new MultiRenderer type.

Added testing for this new renderer.
Merge branch 'master' of git@github.com:Jeff0029/SnakeFlash.git

Conflicts:
	src/Engine/EntityComponent/Components/Renderer.as
	src/Gameplay/Snake.as
Added event functionality to renderers and cleaned up updates.
Merge branch 'master' of git@github.com:Jeff0029/SnakeFlash.git

Conflicts:
	src/Gameplay/Snake.as

Also added RemoveEventListener method to Renderer.