detect multiple keys pressed
multiple keys
Basic multi-key press is working.
Engine sound properly linked with keyup and keydown.
Fixed pause button, throttled space function(debounce didn't seem to allow for holding the spacebar down), and converted for loop into _.each loop
Removed multiple-key-press.js
fixed conflicts
Merge pull request #27 from aj0strow/mutiple-key-press

Mutiple key press