• Updates for iOS SDK 9.0 and Xcode 7.0
• Added support for Bitcode
• Added nullable type annotations
• retrievePaymentInfoForReference now expects a viewController (as it might have to prompt a login screen)
• Some parameter validation that earlier resulted in thrown exceptions will now instead return NSErrors
• Using enforcedUserAccount to handle multiple account won't no longer logout accounts when switching account
• Extended the description of enforcedUserAccount