Adding beam dynamics to main.cc.
Adding beam dynamics to main.cc.

frib-high-level-controls/FLAME,frib-high-level-controls/FLAME,mdavidsaver/jmbgsddb,frib-high-level-controls/FLAME,mdavidsaver/jmbgsddb,mdavidsaver/jmbgsddb,frib-high-level-controls/FLAME,mdavidsaver/jmbgsddb,frib-high-level-controls/FLAME,frib-high-level-controls/FLAME