Debug recovery, updates for trigRecoExe, dbgAnalysis and dbgEventInfo
Update to check if the number of status words is not zero in dbgEventInfo.py to ensure crashes don't occur when recovered events have no status word.
Removal of the functions getPrePosdif_branch and getPrePosdiff from dbgAnalysis.py (and where they are called in trigRecoExe.py) as this step is being added to the script that reads the values in the root files for the debug recovery web application so is not needed here.