Apple released iTunes 12.5.1 today, no doubt to accommodate today's forthcoming release of iOS 10. Changes include an updated Apple Music interface; new Work and Movement tags, new Dislike tag. Most of these features had been available to beta users of iTunes 12.5. Additionally, some AppleScript bugs got fixed, including a problem programmatically setting the loved and disliked properties of folder playlist, the ambiguous Music/music bug for the special kind property (to do this, the music value for media kind was changed to song), and all media kind values appear to work correctly when changed with set.
More as it develops.