Use storyboard for views

- Remove all xibs.
- Remove unnecessary cell wrapper (old iOS technique).
- Move all game and round saving and rollbacks inside the game class.
- Rematch responsibility is now delegated to the game list.
- Shared score summary view throughout the bidding screens.
- Round cancelling and completion is delegated to the game view controller.
- Setting cancelling and completion is delegated to the game list.
- Updated code styling to standard objective-c, specifically: remove spaces in method names and the location of the asterix for pointers.
- Split tricks won controller into two separate controllers for regular bids and misére bids.
- Present a simplified game summary in the game list (temporarily).