Add FB logout option.
Update button DOM element when user logs out of FB.
Change source of rickroll video.
Replace video src with HTML5 videotag and video.
Merge pull request #59 from tleung999/rickroll

Rickroll
Merge pull request #55 from tleung999/fb_logout

Add FB logout option.
Merges cleaner

Merge branch 'master' of https://github.com/tleung999/simplicity into cleaner

Conflicts:
	public/js/modules/rickroll.js