message: setters for sigmaNN
diff: -void runGlauberMC(Bool_t doPartProd=0,Int_t option=0,Int_t N=250000)
  +void runGlauberMC(Double_t sigNN=64, Bool_t doPartProd=0, Int_t option=0, Int_t N=250000)
  {
  //load libraries
  gSystem->Load("libVMC");
  @@ -15,18 +15,12 @@ void runGlauberMC(Bool_t doPartProd=0,Int_t option=0,Int_t N=250000)
  // supported systems are e.g. "p", "d", "Si", "Au", "Pb", "U"
  Option_t *sysA="Pb";
  Option_t *sysB="Pb";
  - Double_t signn=64; // inelastic nucleon nucleon cross section
  - //const char *fname="GlauberMC_PbPb_ntuple.root"; // name output file
  -
  - // run the code to produce an ntuple:
  - // AliGlauberMC::runAndSaveNucleons(10000,"Pb","Pb",72);
  Double_t mind=0.4;
  - // AliGlauberMC::RunAndSaveNtuple(nevents,sysA,sysB,signn,mind);
  Double_t r=6.62;
  Double_t a=0.546;
  const char *fname="glau_pbpb_ntuple.root";
  - AliGlauberMC mcg(sysA,sysB,signn);
  + AliGlauberMC mcg(sysA,sysB,sigNN);
  mcg.SetMinDistance(mind);
  mcg.Setr(r);
  mcg.Seta(a);
  @@ -34,14 +28,12 @@ void runGlauberMC(Bool_t doPartProd=0,Int_t option=0,Int_t N=250000)
  mcg.SetDoFluc(0.55,78.5*0.92,0.82,kTRUE);
  else if (option==2)
  mcg.SetDoFluc(1.01,72.5*0.92,0.74,kTRUE);
  - mcg.SetDoPartProduction(doPartProd);
  - //////////////////
  + mcg.SetDoPartProduction(doPartProd);
  mcg.SetdNdEtaType(AliGlauberMC::kNBDSV);
  mcg.GetdNdEtaParam()[0] = 2.49; //npp
  mcg.GetdNdEtaParam()[1] = 1.7; //ratioSgm2Mu
  mcg.GetdNdEtaParam()[2] = 0.13; //xhard
  - //////////////////
  mcg.Run(nevents);
  