From Cedric Pinson, this commit contains the following change:

* Change ref_ptr to observer_ptr to avoid cross reference and leak in Skinning
* Set invalidate to true to re run the check visitor in Skeleton
* Shallow copy Sampler in channel copy constructor
* Add accessor in VertexInfluence
* Remove dead code in Timeline.cpp
* Dont force linking in Bone::UpdateBone, the decision is done by the user or the manager
* Add offset in timeline stats to display each manager on the screen
* Add a flag in animation manager base to enable or not automatic link when modifying the manager

include/osgAnimation/VertexInfluence

@@ -1,5 +1,5 @@
 /*  -*-c++-*- 
- *  Copyright (C) 2008 Cedric Pinson <mornifle@plopbyte.net>
+ *  Copyright (C) 2008 Cedric Pinson <cedric.pinson@plopbyte.net>
  *
  * This library is open source and may be redistributed and/or modified under  
  * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
@@ -96,6 +96,8 @@ namespace osgAnimation
             _bone2Vertexes.clear(); 
             _uniqVertexSetToBoneSet.clear();
         }
+
+        const VertexIndexToBoneWeightMap& getVertexToBoneList() const;
     protected:
         BoneToVertexList _bone2Vertexes;
         VertexIndexToBoneWeightMap _vertex2Bones;