took Maartens code
Got matte shader working
i have reflection... i think?
Merge branch 'inge-ass4' of https://github.com/maarten990/Graphics into inge-ass4

Conflicts:
	week_4/shaders.c
Merge branch 'inge-ass5' of https://github.com/maarten990/Graphics into inge-ass5

Conflicts:
	week_4/shaders.c
fixed get_cell to how it should really be