--This linThe gui has a new function, GetViewer, so that you can manipulate the

--This linThe gui has a new function, GetViewer, so that you can manipulate the
viewer, e.g. add a reference tree:
  gui->GetViewer()->AddReferenceTree("CalibReferenceTree.root", );
By default, the reference-tree objects are acessd by "R.<whatever>",
e.g. R.Noise.fElements

  TFriendElement* AddReferenceTree(const char* filename, const char*
treename = "calPads", const char* refname = "R");

After manipulating the viewer you have to reload the gui, in order to
update the lists:
   gui->Reload()
The gui should remember the selected variable and try to select it again
after the reload.
The Reload function does nothing else than
  gui->Initialize(gui->GetViewer)
this gives you for example the possibility to open a standalone gui,
just by giving 0 as filename ::ShowGUI(0) and than to load a CalibViewer

In addition, there are some small changes:

e, and those below, will be ignored--

M    AliTPCCalibViewer.h
M    AliTPCCalibViewerGUI.cxx
M    AliTPCCalibViewerGUI.h
M    AliTPCCalibViewer.cxx