Fixed NineSlice render offsets. For more detail: Normally in the top slice
it will move by the topLeft's width in pixels on x. But then it doesn't
subtract that width on the other side. It instead subtracts it on the
topRight side which can lead to errors if the slices are not equally
sized.
Merge branch 'master' of https://github.com/despondentdonkey/CanvasGameFrame

Conflicts:
	cgf/render.js