Licence update & 3D culling

files:

	modified:   ObjectManager.cpp
	modified:   ObjectManager.h
	modified:   UI.cpp
	modified:   UI.h
	modified:   angTest.cpp
	modified:   camera.cpp
	modified:   camera.h
	modified:   glut_backend.cpp
	modified:   gui.cpp
	modified:   gui.h
	modified:   lighting_technique.cpp
	modified:   lighting_technique.h
	modified:   math_3d.cpp
	modified:   pipeline.h