Jens Wiechula changes.

Jens Wiechula changes.
Mainly for visualization of the OCDB entries.

AliTPCcalibDB.cxx.diff                  Add TPC/Calib/TimeDrift and reference file creation funciton
AliTPCcalibDB.h.diff                    Add TPC/Calib/TimeDrift and reference file creation function
AliTPCcalibDButil.cxx.diff              Add comparison with reference data
AliTPCcalibDButil.h.diff                Add comparison with reference data
AliTPCCalibViewer.cxx.diff              Small fixes
AliTPCCalibViewerGUI.cxx.diff           Small fixes
AliTPCCalibViewerGUItime.cxx.diff       Add support for reference trees, add support for multiple graphs, small fixes
AliTPCCalibViewerGUItime.h.diff         Add support for reference trees, add support for multiple graphs, small fixes
AliTPCCalPad.cxx.diff                   Add sector variable to GlobalSidesFit
AliTPCConfigParser.cxx.diff             Small fix
CalibEnv.C.diff                         Add drift velocity, add comparison with referece, add iroc offset in CE fit
calibVarDescription.txt.diff            Add new variables