- so far on ZPlanarTracker_geo.cpp
   - simple example with ILD like VXD and SIT

 - removed path variables in SiD_Markus:
    - resolution does not work w/ tinyxml

     CylinderSurface::center()
     ICylinder::center()
 - removed all virtual inline functions
  

     VolSurface::length_along_u()
     VolSurface::length_along_v()
     Surface::volumeOrigin()
   - needed for cylinders
 - changed order of u and v for VolCylinders ( v is z )
 - fixed CylinderSurface to use VolCylinder(_volSurf)
   

     to handle pixel and strip detectors 
   - updated release notes

   shows all DetElements in model incl. #surfaces

Add component to allow the setup of the magnetic field tracking in Geant4 from python. See DDG4/examples/CLICSidSimu.py for the usage.

   -> added operators ==/!= for map<>::iterator

   over maps on macos