to specific
make user re-register impossible
add card class
add already draw expression
Merge pull request #16 from neko2014fresh/refine_game_procedure

refine_game_procedure
add-chat feature
Merge pull request #19 from neko2014fresh/add-chat

add-chat feature
Merge branch 'refs/heads/master' into enable-sass

Conflicts:
	public/stylesheets/style.css