006 mostly menu changes & difficulty selection

006  Aug 1st, 2013
- added game options dict to game() instead of multi-variables
- massive changes in gameConstants for zombie stats and game options to
streamline different level creation w/ different zombies
..also some changes to how createZombies works (and how its called), and
also the level-menu logic
..also some changes to setWinningTile to accept a given tile position
instead of using the constant
- added dmg stat to miners based on strength to better regulate hit dmg

006  Aug 2nd, 2013
- made some changes to Window - no longer uses a drawPos, simply
self.pos
- made some changes to labels to handle multi-line text
- almoost done the first instruction window