AliRsnReader:

AliRsnReader:
- added a check on vertex status and number of contributors

AliRsnAnalysisSE:
- added a global histogram which tells how many events in the sample were used
  and how many were skipped (required for correction purposes)

Macros:
- added new multi-purpose example macros with configuration variables
  in the top part of the code, in the same style as the ConfigPPR.C macro