Comment #6 on issue 460 by alexandr...(a)gmail.com: scaleBy: should be in
shapes, and not in MONode
http://code.google.com/p/moose-technology/issues/detail?id=460
It is currently in MORoot. But a node (or a shape) has to be able to scale
itself. If it is solely defined on MOCanvas, then the canvas has to modify
the bounds of the node, which is not nice.