remove global vars, old debug statements, and add stub class for hero
get basic hero movement going
change movement to be relative to cursor and add on-screen debug info
remove some more unecessary logging and get basic collision working (with tests)
change camera to center on hero
specify z indexes for walls and hero and add some todos
move constants to better locations and stub out a class for darkness/lighting
get basic lighting radius working
remove unecessary darkness class, add level exit, add noclip mode, add custom sized mazes
add basic robots (no movement yet)
make robots bloodthirsty
get LOS working with robots
increase robot LOS range
remove unecessary entity module and put lasers into game (collision still not working 100%)
fix laser collisions
add a lifetime to lasers
changed MAX_LIFETIME to be a function of SPEED
Merge pull request #1 from btowle/next

Add a lifetime to lasers
minor refactor to laser lifetime
implement proximity meter