Basic Input structure
Renamed Input.enable() to Input.init()
Moving Cube to Shape
Merge branch 'release-3.0.0' of git://github.com/Nananas/HaxePunk into Nananas-release-3.0.0

Conflicts:
	haxepunk/Engine.hx
Merge branch 'Nananas-release-3.0.0' into release-3.0.0