first work on starfield
use player speed, fix memory error
unlimited size starfield
remove unused variable
use polygonal stars with alphablending. fade in new stars. use a vertex array with structs. #260
improve code
fix hd3000
Merge branch 'starfield' of https://github.com/voxelinc/voxellancer into starfield
update glow
Merge branch 'master' of https://github.com/voxelinc/voxellancer into starfield

Conflicts:
	src/game.cpp
	src/game.h
	src/main.cpp
field from position delta
Merge branch 'master' of https://github.com/voxelinc/voxellancer into starfield

Conflicts:
	src/game.cpp
	src/game.h
	src/main.cpp
Merge branch 'starfield' of https://github.com/voxelinc/voxellancer into postprocessing

Conflicts:
	src/game.cpp
	src/game.h
	src/main.cpp
add starfield to pipeline