fixed pyglet bug for AMD video cards
changed comments in sprite_test.py
changed comments in sprite_test.py
made pythonpath tweaks cross-OS compatible
Merge remote-tracking branch 'origin/master'

Conflicts:
	roguestate.py
made pythonpath tweaks cross-OS compatible
comments on tile generation code
game window and game state stack added
refactored so the gamemodes don't have to call global variables
geometry, gamedata, worldgen, and viewport ported from old game
updated README with status