created playing card VC
embedded game in navigation controller for history
added class method for number of cards to match
switched viewcardstomatch to an instance method since we might presumably implement a UI element (again) to set it
new VC's added and connected. displaying number and symbol for set. no matching logic yet.
basics working. shading looks terrible and needs to be fixed.
switched card game model to pass cards/score back to controller
setting attributed strings in the ui
removed old comment
Merge branch 'feature/assignment-3' into develop