Changed CardGameViewController to be an abstract class
Added new PlayingCardViewController
Added SetCard class implementation
Added SetCardDeck implementation
Changed SetCard and SetCardDeck implementation added scene to Storyboard
Added SetCard match: method, SetGame UI elements and TabBarController and some other minor tweaks
Added HistoryCardGameViewController class and Storyboard scene
Added prepareForSegue: implementation and addCurrentResultsToPastGameResults method in SetCardGameViewController
Added HistoryCardGameViewController implementation
Added History button for PlayingCardGameViewController and prepareForSegue: method implementation