boss spawns off screen and enters once aliens scatter
alien boss is moving around
Merge branch 'master' of https://github.com/znagler/flashforward into boss_movement
alien boss moves around
remove comments
randomize movement of alien boss
merge in master
Merge branch 'master' of https://github.com/znagler/flashforward into boss_movement

Conflicts:
	app/assets/javascripts/fight.js
	app/assets/javascripts/game_ui.js
Merge pull request #56 from znagler/boss_movement

Boss movement