Bullet moves from start to target at some speed
Shoot bullet at wherever user clicks
Make stage width and height globally accessible
Instantiate mouseclicklistener in Game
Make bullet larger
Shoot bullet from center of player to where player clicks.

Compensate for Crafty.stage not neccasarily being positioned at 0,0
Bullets are destroyed when they hit an obstacle
Merge branch 'bullet'

Conflicts:
	coffee/components.coffee
	coffee/game.coffee