- This caused a crash whan the simulation was not provided a
          physics list option file

        - The Time of arrival of electron was too long
        - fixed the issue by skipping DETransport step going above
          geometrical safety

        - Fixing some bug in DE physics
        - Scorer for counting drift electron

        - Adjustable step length
        - good speed at 1mm step
        - take into account the local field direction

        - Circular dependencies of library not correctly dealt
        - Slight fixes in PhysicsList with regards of private member
        difference between 10.2 and 10.3

        - Follow the optical photon model
        - Add a property table to the material, with drift velocity and
          diffusivity
        - add new particle drift electron
        - add new transport process for drift electon
        - Still need some work (drift direction is hard coded, small bug
          in transport cause G4 to issue exeception)

Changed TSpectrum Search threshold from 0.5 to 0.25 to consistently find three peaks in triple-alpha spectra