Z-Buffer mit 1 (statt 0) initialisiert und depthFunction auf LESS umgestellt.
Merge branch 'basic-structure' of https://github.com/LukasKalbertodt/cg-14 into basic-structure

Conflicts:
	game/Camera.cpp
Merge branch 'basic-structure' of https://github.com/LukasKalbertodt/cg-14 into basic-structure