New code points
Interactions retain themselves
Moved `rootViewControllerForCurrentWindow` from Rating Flow to ATUtilities
Removed references to `self.viewController` from the ATUtilities version of `rootViewControllerForCurrentWindow`
Enjoyment dialog to now uses the ATUtilities version of `rootViewControllerForCurrentWindow`
Specific button types.
dealloc
ATInteraction now implements NSCopying protocol
Interaction VCs copy their Interaction
dealloc, etc. in Rating Flow interactions
Rating Dialog methods for opening the App Store, etc.
Added StoreKit delegate methods
Upgraded to new event label (code point) names.
Fixes IOS-439
Enjoyment Dialog text now stored under "title" key.
Enjoyment Dialog "body" not currently supported.
Get Feedback dialog title and body from interaction.
Message Center interaction, Phase 1.
Fixes IOS-402
Feedback Dialog is a ATMessagePanelDelegate
Showing Message Panel from Feedback Dialog interaction.
Engaging Feedback Dialog codepoints
Feedback Dialog interaction