Update to target iOS 7.
Match runs in two card mode only now.
Refactor so we have superclasses from which we can build set game. Match game working after refactor.
Update base class methods that should not be called with error messages.
Add a simple implementation of match on SetCard.
Set card game displaying cards correctly.
Set gameplay working.
Fix scoring bug.
Fix face up state when there is no score.
Finish results status formatting with attributed string.