Release Notes: This release features a new controller called Zoomer providing mouse wheel zooming of drawables. There is a new viewport widget named ScrolledViewport. It contains a basic viewport, but adds vertical and horizontal scrollers and provides an API very similar to Gtk's ScrolledWindow widget. Also new are two drawing modes. One allows for intermediate drawing, primarily to support compositing. The other is alpha drawing using cairo's paint_with_alpha() methods. Support for rounded rectangles is also added.