Better naming convention (ARC).
Don't automatically scroll (iOS 7 change).
Removed Mac OS X code.
Simple failure handling - delete the store if we cannot migrate. TODO: provide a way for the user to configure this behaviour.
Made deleteAll async again.
Renamed delete method (clash).
Added header declaration for propertyDescriptionForName.
Removed back ticks, as Xcode 5 doesn't parse them.