Remove explicit mention of llvm 3.4
Fix a typo in the formatting style
Add a way to include externally synchronized items in DeclarativeItem
Add override annotations to ZoomLabelOverlay
Enhance the interface of OverlayGroup
Add a click handler to the style of Static. It is set in C++, not XML.
Add a few convenience methods to Scene
Add a new overlay that can wrap any item with a title and a close button
Change comment pup-ups to use BoxOverlay instead of a dedicated wrapper