Fixing conflict

        - AnyAboveThreshold returning true even if no decay allowed
        - Causing beam to try to decay repeatly in simulation

        - If the lifetime section contained a special caracter

        - now fully functional
        - fixed a bug in mugast annular anbalysis heritated from S1
        specific coincidences

        - Adding Reverse Map for simulation reshufle of strips
        - Fixing bug in TMugastPhysics causing Square geometry to be
        used for Trap and vis versa, depending on input file
        - Recenter of strip position around detector center in MugastPhy

        - Inversion of the argument in AddDetector Method leads a wrong
        position

  -Now, we give the e- kinetic energy corresponding to the v_drift and the d_pos to G4 in G4Ionization
& G4DETransport, then we let G4 manage the times
  -The mean free path is replaced by the safety
  -Current problems: it's not working with trans spread, and a "dirac" pic appear in time

  - ROOT branches with real energy/time added to NPLib
  - N.B. electron source added to EventGeneratorIsotropic

        - I was resizing the drift vector by more than the safety
        - replaced the factor of 2 by a factor of 0.9

volume bondaries

        - User can add a level decay file in geant4 format
        - this is done in the event generator file
        - the level scheme file should be saved in the tree -> to be done

using the field direction as reference.