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

src/osgAnimation/Animation.cpp

@@ -133,8 +133,6 @@ bool Animation::update (float time, int priority)
         break;
     }
 
-    //  std::cout << "t " << t << " / " << _duration << std::endl;
-
     ChannelList::const_iterator chan;
     for( chan=_channels.begin(); chan!=_channels.end(); ++chan)
     {