class AliEMCALSDigitizer: public TNamed

 This is a Class that makes SDigits out of Hits
 A Summable Digits is the sum of all hits originating
 from one in one tower of the EMCAL
 A threshold for assignment of the primary to SDigit is applied

 JLK 26-Jun-2008 Added explanation:
 SDigits need to hold the energy sum of the hits, but AliEMCALDigit
 can (should) only store amplitude.  Therefore, the SDigit energy is
 "digitized" before being stored and must be "calibrated" back to an
 energy before SDigits are summed to form true Digits

 SDigits are written to TreeS, branch "EMCAL"
 AliEMCALSDigitizer with all current parameters is written
 to TreeS branch "AliEMCALSDigitizer".
 Both branches have the same title. If necessary one can produce
 another set of SDigits with different parameters. Two versions
 can be distunguished using titles of the branches.
 User case:
 root [0] AliEMCALSDigitizer * s = new AliEMCALSDigitizer("galice.root")
 Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
 root [1] s->Digitize()
             // Makes SDigitis for all events stored in galice.root
 root [2] s->SetPedestalParameter(0.001)
             // One can change parameters of digitization
 root [3] s->SetSDigitsBranch("Redestal 0.001")
             // and write them into the new branch
 root [4] s->Digitize("deb all tim")
             // available parameters:
             deb - print # of produced SDigitis
             deb all  - print # and list of produced SDigits
             tim - print benchmarking information

*-- Author : Sahal Yacoob (LBL)
 based on  : AliPHOSSDigitzer