process PID to avoid collision when running multiple npanalys in
  parallel

        - recording not yet done
        - add appropriate method to EventAction
        - add correct option to NPOptionManager

Added forgotten { in NPDetectorManager l.277 (prevented compilation without support for multitheading)
Minor modifications to TComptonTelescopePhysics
Added clarity to ComptonTelescope project with preprocessor commands for different runs and a calibration functionnality

        - The fIsSplit variable was not initialised to false

        - fixing unit of velocity in NPParticle

  when splitting is requested by the user

        - output one tree per detector in a folder with associated .tree
          file

        - User can build Friends entry by hand
        - User can use .tree file as entry point to automatically
          generate friends input
        - User can use -T flag with .tree file

        - Use NPL::InputParser
        - Support Friend tree
        - Support .tree file (not fully tested yet)

        - in some cases the analysis get stuck at startup

        - all in place
        - need to do the proper kinematic calculation