First parts of scene graph, more Project Bar copy/paste, new examples & more.
It's a start... But i would expecting a start within an editor. Since there You supposed to "build up your objects". Adding an object to existing scene graph in editor should automatically inherit it - group together (move, rotate, etc ,etc).
Making add/remove child have no point kind of.
It's actually much easier, and less risky, to start with the runtime. Any non-trivial editor feature is a real heavyweight development project, and far more time consuming if we have to make any changes, which is why we started with the runtime instead.