boss alien has 3 versions that display in level intro
Merge branch 'master' of https://github.com/znagler/flashforward into background
resolved merge with resetting globals in welcome for game restart
Conflicts:
	app/assets/javascripts/level_intro.js
	app/assets/javascripts/welcome.js
Merge pull request #65 from znagler/background

boss alien has 3 versions that display in level intro