Fixed the readme file.
Removed outdated comment.
Reworked card flipping in attempt to fix #35.

There are now two messages: `cardOpen` and `cardsClose` which are
treated separately. This also clears the code up a bit imo.
Merge branch 'master' of github.com:lucasb-eyer/mwdns

Conflicts:
	static/js/card.js
Fixed small bug in asset loading.