added TODOs
fixed camera locking (to edges of the map or ...

... or centering according to the center of the map when the map is
smaller than the view)
added/fixed array helpers with explanation on why
added A LOT

- bullet speed
- start game when everything is loaded
- random debugging stuff
- added foot animation to zombies
- foot animation upgraded TO THE MAX thanks to my incredible math skills
added map-related stuff

- added map size (width/height) (in pixels) helpers
- made map bigger to test camera locking
added a lot of CS2D graphics (filespam)

no copyright infridgement intended

seriously

also, I made '154.png'... to a certain degree...