From Andrei:

  - one fix in TGeoIntersection::DistToIn() plus few minor changes
  - changed TGeoManager::FindNode() and FindNormal() to cope with G3
interface
  - few other minor changes


git-svn-id: http://root.cern.ch/svn/root/trunk@7326 27541ba8-7e3a-0410-8455-c3a389f83636