- Improve conditions handling. Started to implement using simple telescope
    detector from C.Burr.
  - Add variable DD4HEP_LIBRARY_PATH to be used on MacOSX El Capitane
    to overcome DYLD_LIBRARY_PATH protection issues.
  - Fix to copy with negative(rebased) IDDDescriptor fields
    (affects IDDDescriptor and VolumeManager).
    2 New tests:
    - ClientTests/Bitfield_SidesTest.xml to test readout string:
      system:8,barrel:-2
    - ClientTests/Bitfield_SidesTest2.xml to test readout string:
      system:16,barrel:16:-5

   - updated release notes
   - increased version number
   - set DD4HEP_USE_CXX11 ON

Caution please. Do not update nor use this relase until green light comes. For details please see doc/release.notes.

Support for multi-threaded Geant4 applications using DDG4Details are described in the release notes.

      a polymorphic pointer of type VolSurfaceBase
      - this should facilitate the creation
        of dedicated surface classes for special cases
        such as inside the beampipe or the face of the calorimeter

 - updated release notes

   - release notes and versions

   Markus in release   ----------------- v00-12 -------