facebook login is done.. Need some testing..

Should add few usability features like changing the nick field to div.
removing the key after login
Merge branch 'master' into login

Conflicts:
	gate/http/socket.js
	public/sdk/client.js
	public/sdk/embed.js
Test change...
Fixed the bugs in facebook login and added the profile page,
logout functionality.
Merge branch 'login'
Merge branch 'master' of github.com:scrollback/scrollback