updates in the TRD qa framework:

updates in the TRD qa framework:
- modify the interface of AliTRDtrackInfo
- improve debug streaming from AliTRDtrackInfoGen
- flexible output in AliTRDtrackingResolution (to be followed)

-This line, and those below, will be ignored--

M    AliTRDcalibration.cxx
M    AliTRDcheckDetector.cxx
M    AliTRDpidChecker.cxx
M    AliTRDpidChecker.h
M    AliTRDpidRefMaker.cxx
M    AliTRDrecoTask.cxx
M    AliTRDtrackInfo/AliTRDtrackInfo.cxx
M    AliTRDtrackInfo/AliTRDtrackInfo.h
M    AliTRDtrackInfoGen.cxx
M    AliTRDtrackInfoGen.h
M    AliTRDtrackingEfficiencyCombined.cxx
M    AliTRDtrackingResolution.cxx
M    AliTRDtrackingResolution.h
M    run.C