- moved IMaterial, ISurface, Vector3D and Vector2D to DD4hep::DDRec
  - keep old header files in DDSurfaces with using declarations in
    DDSurfaces for bwd compatibility

 - add MaterialManager( Volume v) instead
     - use this in Surface.cpp

 - explicetly pass DD4hep::Geometry::LCCD to SurfaceManager c'tor
 - don't instanitate VolumeManger in SurfaceHelper but in SurfaceManager

 - needed for unique_ptr and gcc4.9