Added contents property
Added PlayingCard model class
Fixed content and suit setter to be more correct
Extracted valid arrays into class methods
Ensured only valid ranks can be set
Added Deck and PlayingCardDeck
Implemented Deck (addCard, getRandomCard)
Implemented init to create the playing card deck
Fixed fat-finger bug, should be modulo
Fixed logic bug, King wouldn't be settable this way
Added logging statment to help track down a bug
Implemented to draw a random card when the card is flipped