need to compare vertex of particle (vsXYZ) with endpoint of parent (veXYZ)

   <include ref="${DD4hepINSTALL}/DDDetectors/compact/detector_types.xml"/>

   to set the TypeFlag from xml element <type_flag type="0x42"/>

 - use DetectorSelector in dumpdetector

 - changed method signature: LCDD::detectors(unsigned int includeFlag,  unsigned int excludeFlag=0 )
   - allows to select sets of detectors with some properties and explicitely excluding others
   - see dumpdetector for example usage

  - added LCDDImp::detectors(unsigned int typeFlag, bool bitsSet)
  -> allows to set detector properties (with DetType) for DetElements and
    get sets of detectors with certain properties, e.g.
    ( DetType::TRACKER | DetType::BARREL ) selects all barrel trackers

   a flag wordL DetType
 - added test_DetType.cc

avoid magic numbers :)

Moved LEFT_DETECTOR and PARTICLE_STOPPED