no more dependencies on player. removed update logic from renderpipeline. moved starfield to gamescene.
who is messing with the glow? please use the voxellancer branch!
some fixes
Update defaultrenderpipeline.h
make rendermetadata a struct
document starfield shader
Merge branch 'master' of https://github.com/voxelinc/voxellancer into refactor_renderpasses

Conflicts:
	src/display/rendering/postprocessingpass.h
	src/starfield.h
Merge pull request #384 from voxelinc/refactor_renderpasses

refactor renderpipeline
merge with master