message: update doygen doc, specially on how to execute the macro for Root6
diff: /// \ingroup EMCAL_TestSimRec
  /// \brief Simple macro to test EMCAL simulation
  ///
  -/// Simple macro to test EMCAL simulation
  +/// Simple macro to test EMCAL simulation.
  +/// It will take the Config.C macro that is sitting in the same place as the execution is performed.
  +/// In order to execute this you can do
  +/// * Root5: aliroot -q -b -l $ALICE_ROOT/EMCAL/macros/TestSimuReco/TestEMCALSimulation.C
  +/// * Root6: aliroot -q -b -l $ALICE_ROOT/EMCAL/macros/TestSimuReco/LoadLibForConfig.C $ALICE_ROOT/EMCAL/macros/TestSimuReco/TestEMCALSimulation.C
  ///
  -/// \author Jenn Klay, LLNL
  +/// Or directly in the root prompt
  +/// root [1] .x LoadLibForConfig.C //Root6
  +/// root [2] .x TestEMCALSimulation.C
  +///
  +/// In order to find all the included classes in the Config.C one should add to the rootlogon.C file some paths
  +/// gSystem->SetIncludePath("-I$ROOTSYS/include -I$ALICE_ROOT/ -I$ALICE_ROOT/include -I$ALICE_ROOT/ANALYSIS/macros -I$ALICE_ROOT/STEER -I$ALICE_ROOT/STEER/STEER -I$GEANT3DIR/include -I$GEANT3DIR/include/TGeant3");
  +/// or do it in the root prompt before execution.
  +///
  +/// \author : Jenn Klay, LLNL.
  +/// \author : Gustavo Conesa Balbastre <Gustavo.Conesa.Balbastre@cern.ch>, (LPSC-CNRS).
  ///
  #if !defined(__CINT__) || defined(__MAKECINT__)
  