Simpler intranuclear cascade initialization.
Run SF only if desired sf_method is available.
corrected neutrino pdg code for ND280 flux read frome root files (was always 14)
Wrong nucleon in reinteraction prevents it from happening, and no longer crashes nuwro.
At startup list active parameters to file (not only to screen)
params.txt: forcing empty string parameter (e.g. geo_file= ) is now legal.