Added "shape" object and additional graphics

Works to the point where multiple shapes can be rendered, but they can't
be deleted or moved yet. To do: move main graphics code back to main,
it's supposed to be there.
Merge branch 'master' of https://github.com/DirkLaserblast/Goldenrod_Engine

Conflicts:
	Goldenrod Engine/graphics.cpp
Merge branch 'master' of https://github.com/DirkLaserblast/Goldenrod_Engine