added some background to the decks
Merge branch 'master' of https://github.com/alexcodreanu86/sinatra-flash-cards

t added background photos
played with the colors of the cards
added a bit of javascript magic to it
added a bit of slide effect
added toggle in the edit decks

the buttons can be toggled when clcking on the deck
Merge pull request #5 from alexcodreanu86/master

I added some slide effect with javascript let me know if you like. If not it is really easy to remove