Update of the tag system. 1. Correct implementation of the event ID - period, orbit...

Update of the tag system. 1. Correct implementation of the event ID - period, orbit ID and bunch-crossing number. 2. Adding the information relevant to the reconstruction of the first LHC data which will be taken with a bunch-srossing trigger. The information is related to same basic quantities related to the activity in SPD and VZERO. This information should be enough in order to identify the events on which one would run the full aliroot reconstruction. 3. A bug fix in the trigger and trigger-cluster selection in AliEventTagCuts.cxx (Panos)