Import Geant4 4.1.0 source tree

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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * GEANT4 collaboration.                                            *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+//
+// $Id: exampleB04.cc,v 1.5 2002/05/31 11:46:23 dressel Exp $
+// GEANT4 tag $Name: geant4-04-01 $
+//
+// 
+// --------------------------------------------------------------
+//      GEANT 4 - exampleB04
+//
+// --------------------------------------------------------------
+// Comments
+//
+// 
+// --------------------------------------------------------------
+
+#include "G4VPhysicalVolume.hh"
+#include "G4RunManager.hh"
+
+#include "B04DetectorConstruction.hh"
+#include "B04PhysicsList.hh"
+#include "B04PrimaryGeneratorAction.hh"
+
+#include "B04ImportanceDetectorConstruction.hh"
+
+// Files specific for biasing
+#include "G4ParallelImportanceSampler.hh"
+
+int main(int argc, char **argv)
+{  
+  G4int numberOfEvent = 1000;
+
+  G4String random_status_out_file, random_status_in_file;
+  G4long myseed = 345354;
+
+  HepRandom::setTheSeed(myseed);
+
+  G4RunManager *runManager = new G4RunManager;
+  
+  // create the   "tracking"    detector      -----------------
+  runManager->SetUserInitialization(new B04DetectorConstruction);
+  //  ---------------------------------------------------
+  runManager->SetUserInitialization(new B04PhysicsList);
+  runManager->SetUserAction(new B04PrimaryGeneratorAction);
+  runManager->Initialize();
+
+  // create the detector for the importances
+  B04ImportanceDetectorConstruction importancedetector;
+  importancedetector.Construct();
+  // the IStore is filled during detector construction
+  G4VIStore &aIstore = *importancedetector.GetIStore();
+  
+  // create importance sampler to importance sample neutrons
+  // in the importance geometry
+  G4ParallelImportanceSampler pmgr(aIstore, "neutron");
+  pmgr.Initialize();
+  
+  runManager->BeamOn(numberOfEvent);
+
+  return 0;
+}