message: Add useful arguments to addtask
diff: @@ -5,7 +5,10 @@ AliAnalysisTaskSEHFSystPID *AddTaskHFSystPID(int system = 0,
  TString outputSuffix = "_ppMB_kINT7",
  float nsigmafortag = 0.02,
  double fracdownsampl = 1.,
  - double ptmaxdownsampl = 0.) {
  + double ptmaxdownsampl = 0.,
  + double centmin = 0.,
  + double centmax = 100.,
  + int estim = AliAnalysisTaskSEHFSystPID::kCentOff) {
  AliAnalysisManager *mgr = AliAnalysisManager::GetAnalysisManager();
  if (!mgr) {
  @@ -41,6 +44,9 @@ AliAnalysisTaskSEHFSystPID *AddTaskHFSystPID(int system = 0,
  task->SetESDtrackCuts(esdTrackCuts);
  task->SetNsigmaKaonForTagging(nsigmafortag);
  if(fracdownsampl<1.)task->EnableDownSampling(fracdownsampl,ptmaxdownsampl);
  + task->SetCentralityEstimator(estim);
  + task->SetCentralityLimits(centmin,centmax);
  + task->SetfFillTreeWithNsigmaPIDOnly();
  mgr->AddTask(task);
  TString outputfile = AliAnalysisManager::GetCommonFileName();
  