Merge pull request #1 from JSterling8/beta

Beta
Trying to add a PlayingCardDeck then put a card from it as the title for the UIButtons selected state.  Failing miserably so far.
Merge pull request #2 from JSterling8/Beta

Beta
12 cards that show different values when flipped.
Starting to make CardMatchingGame class.
Fixed some warnings in CardMatchingGame