started new framework for game
added zombie definitions
added player definitons
added all sfx loading code
added code for loading level tiles
improved level table
added level timer and variables explanation
adjusted variable names to conform with convention
added table for powerup definiton
added level display, movement, timer, custom mouse pointer
player looks to mouse
added player gun; bold font for level timer
updated todo list
updated README
added gun rotation
capturing mouse pointer; bullet movement
added autofire
added sfx for player steps and shots
added cheese, player can carry cheese now
added moving zombies