Python Super Stupid Space Invaders - 1.0

Wrote this to learn Python/PyGame, and now I think I know enough to be utterly dangerous with this language. ONWARD!!

Python Super Stupid Space Invaders is done! - invader boss wave every so many levels (huge guy, tough to kill) - joystick support for moving and firing (and starting game) - organized some include files differently, to save retyping - track usage of the "N" key - it constitutes cheating - track usage of the "X" key - it constitutes cheating