fixed quartz.py bug loading color-indexed PNGs and other format issues
fixed quartz.py bug loading color-indexed PNGs and other format issues

niklaskorz/pyglet,adamlwgriffiths/Pyglet,adamlwgriffiths/Pyglet,niklaskorz/pyglet,niklaskorz/pyglet,adamlwgriffiths/Pyglet,adamlwgriffiths/Pyglet,niklaskorz/pyglet