* This bugfix potentially alters a Shape's measurements when a minSize and a strokeWidth are present: GraphObject.minSize now correctly constrains the size of Shapes. Before, the minSize of a shape would incorrectly subtract the strokeWidth.
* Disconnected Links now respect Part.dragComputation. This can be used to make them snap when dragging, for example with:
    dragComputation: function(part, pt, gridpt) { return gridpt; }