4: 2009/24/NOV: Gamma in AuAu200 (2007) request

Primary contact: Bertrand Biritz

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AuAu 200 GeV (year 2007)
fast stream data st_btag

1M events for gamma conversions and then 1M for pi0 dalitz decay

flat in pT and y:
pT= 0 - 6 GeV/c
y= -1.5 - 1.5

production version:  P08ie
starver: SL08e
geant geometry option: y2007