Mainly changes related to the added treatment of inactive detector parts in

Mainly changes related to the added treatment of inactive detector parts in
SPD online dead pixel search:
* ITSSPDPHYSda and AliITSOnlineSPDphysAnalyzer:
Modified algorithm for finding dead pixels (now also including information
about inactive parts).
* AliITSOnlineCalibrationSPD:
Added information on which equipments, half-staves, chips are active.
* AliITSOnlineCalibrationSPDhandler:
Added functionality to treat inactive detector parts. The inactive or dead
pixels are referred to as "silent" in the code.
* AliITSPreprocessorSPD:
Using silent (=dead+inactive) pixels instead of dead.
* AliITSRawStreamSPD:
Added members to keep track of which equipments and half-staves are active.
This information needs to be accessed externally after the "Next" method has
been called for the event. Included two more consistency error codes, only
relevant for SPDmood.
Removed check on header and trailer count. Added method to get event counter
 value
* AliITSRawStreamSPDErrorLog:
Increased the maximum number of error codes.

Henrik Tydejo