* BC BREAK FOR WIDGET PLAYERS: all data associated with a widget is now stored in a single "data" JSON attribute, allowing values like true and false and 0 to be faithfully represented
* data-id and data-type are still available for selection purposes
* apos.getWidgetData($el) has been made available to conveniently fetch the JSON data object for you; use this instead of accessing attributes directly
* Slideshow and video widget players updated to support this approach