Changes for 2.1.3

• Fixed a regression (that started in 2.0.0) with AvoidsNodes links improperly re-routing when using the DraggingTool.
• Fixed a undo (redo) bug with AnimationTriggers that used location or position on Parts.
• Improved routing of duplicate links that have Link.adjusting set to a value other than None and have more than the standard number of points in their route.