- DDExamples no longer built with DD4hep
      => will become standalone packages
    - moved UtilityApps from DDExamples to root level
      apps are built by default
    - create DD4hepConfig.cmake
    

As version the revision number will be displayed (to avoid confusion). It is not yet set, this needs another change in CMakeLists.txt.

To have full information in the Doxygen documentation, 'dot' is needed (eg. in the software package graphviz). 

    calorimeters: CaliceTbeam  (Shaojun Lu, DESY)

   of SensitiveDetectors
   (uncomment ###  add_subdirectory(DDSense) in CMakeLists.txt)

   for the cellID 

   ( use px_lay.attr<int>(_U(number)) rather than "number" ) 

 -  added release notes 

    - added gaseous volumes to force creation 
      of hits on the meassurement surfaces

  - fixed some debug output

   with air 

     combine all VolIDs from all parent volumes
     in the path to the current sensitive volume
    - used in Geant4CalorimeterSD and 
      Geant4TrackerSD

Add utility function to BitField64- Use BitField64 in the IDDescriptor class- Remove implossible lookup functions using PlacedVolumes from VolumeManager.