made anti-particles back-to-back to particles. made particle + anti-particle colorless state.
removed couts and event lising
Merge pull request #4640 from lveldere/py8ptgun_fixes_partons_71

Py8ptgun fixes partons 71
revert back to CondDB v1
Merge pull request #4646 from davidlange6/revert_CondDB

revert back to CondDB v1
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X