drop circles in the middle
use qglClearColor
Levels: convert line ending into Unix style
use glDrawArrays instead of glBegin/End in render items
Revert "use glDrawArrays instead of glBegin/End in render items"

This reverts commit a299247a1e4a62fafa80dbf836f3cf3064dd3af2.
Merge branch 'master' of https://github.com/sudnikand/QBox2D
remove in/out - only supported since glsl 330
fix line ending