Attempt to make gameplay work. Parse operations holding me back.
The JoinGame now only lists unstarted games.
Apparently you can’t treat a bool like an object pointer, so I had to pretend my bool was an NSNumber.
Fixed save vs. saveInBackground vs. saveInBackgroundWithBlock

Now there should be no saves, and uses blocks if the code needs to wait
for save before segueing, or doing some action that requires the
objectId of a new object. Also, unwinds are called programmatically
within block in buttonTapped rather than having an additional
storyboard segue. Finally, if a user leaves an unstarted game, the
numberOfPlayers should and now does decrease as well.
Changed Confirm and Create to use buttonTapped rather than storyboard segues, and added customizable rules.

Games store their rules as an NSString.
The user checks if their game has been deleted.
Fixed the manager problem.
It was because we added the manager in the block, without saving it. In the process, I also changed init: to initWithName:, for readability.
Button Tapped now triggered again
I don’t know why it disappeared...
Removed unnecessary Parse call.
Merge pull request #8 from cvcal/GameplayParseProblems

Gameplay parse problems resolved.

Game now essentially works. The basics, at least.