Merge pull request #10 from pohsun/master

Apply PythiaDauVFilter conditions for MC, move to CMSSW_5_3_20@SL6
changed the preselection cut values
Merge pull request #13 from nsahoo/pull-request-Oct10

changed the preselection cut values
consider the additional photons due to FSR in signal sample
Merge pull request #14 from nsahoo/pull-request-oct11

consider the additional photons due to FSR in signal sample
Checked, thanks!