- added stencil test to cut down on processed fragments for lighting calculations
- changed all drawing to vbo
- moved lighting pass texture into gbuffer
- added some ssao property settings
Merge branch 'master' of https://github.com/jacres/of-DeferredRendering

Conflicts:
	src/gBuffer.cpp
	src/gBuffer.h
	src/ssaoPass.cpp
	src/testApp.cpp
	src/testApp.h