Use of QGS for hyperons, anti-hyperons and anti-nucleons

QGS-based physics lists use now QGS for hyperons, anti-hyperons, anti_proton and anti_neutron projectiles at energies above 12 GeV (and FTF below 25 GeV, whereas in previous Geant4 versions, FTF was used for all energies - for these hadrons in QGS-based physics lists). Note that light anti-ions (anti-deuteron, anti-triton, anti-He3 and anti-alpha) cannot currently be handled by the QGS string model.