v0.0.2

Documentation fix release.

• Fixed the README usage example, which would crash if copy-pasted: update() was missing self, PlayState used pg.KeyDown instead of pg.KEYDOWN, and the on_enter signatures didn't accept the frm keyword the StateManager passes.
• Corrected the pgsm expansion to "PyGame State Manager".

No code/API changes.

Release v0.0.1

Removed the pygame dependency

Release v0.0.0

Initial release