Fixed bug with FlipX, made resetting control points undoable so it can register with the animation tool, made the ability to create prefabs from all the skins in a Skeleton component - need to have "Prefabs" directory under "Assets", optimized some of the InverseKinematics functions to be a bit faster and more efficient, use cached variables to minimize garbage collection.  Added AnimationHierarchyEditor to fix broken animations if needed.