More changes, including a new physics class.
Modifications to new TA2Pi0Compton physics class.  More to come.
Cleaning up data.MC directory.  Using new naming scheme suggested by AN.
	deleted:    acqu_user/data.MC/A2.MC
	deleted:    acqu_user/data.MC/Analysis_MC.dat
	deleted:    acqu_user/data.MC/BaF2-PbWO4_Cherenkov_MC.dat
	deleted:    acqu_user/data.MC/CB_Cut_DeltaE-E_Pion.dat
	deleted:    acqu_user/data.MC/CB_Cut_DeltaE-E_Proton.root
	deleted:    acqu_user/data.MC/CB_MC.dat
	deleted:    acqu_user/data.MC/CentralApparatus_MC.dat
	deleted:    acqu_user/data.MC/Cristina_MC.dat
	deleted:    acqu_user/data.MC/CylMwpc_MC.dat
	deleted:    acqu_user/data.MC/FP_MC.dat
	deleted:    acqu_user/data.MC/MWPC_MC.dat
	deleted:    acqu_user/data.MC/NaI_MC.dat
	deleted:    acqu_user/data.MC/PID2_MC.dat
	deleted:    acqu_user/data.MC/TAPS_Cut_DeltaE-E.root
	deleted:    acqu_user/data.MC/TAPS_Cut_TOF.root
	deleted:    acqu_user/data.MC/TAPS_Cut_TOF_2.root
	deleted:    acqu_user/data.MC/TAPS_MC.dat
	deleted:    acqu_user/data.MC/Tagger_Ladder_450_MC.dat
	deleted:    acqu_user/data.MC/Tagger_Ladder_883_MC.dat
	deleted:    acqu_user/data.MC/Tagger_MC.dat
	deleted:    acqu_user/data.MC/Veto_Cherenkov_MC.dat
	deleted:    acqu_user/data.MC/v2u_450_plot.ehist
	deleted:    acqu_user/data.MC/v2u_450_plot.ghist
	deleted:    acqu_user/data.MC/v2u_883_plot.ehist
	deleted:    acqu_user/data.MC/v2u_883_plot.ghist