messenger works, testing other scintillators
	modified:   include/NSPrimaryGeneratorAction.hh
	modified:   include/NSPrimaryGeneratorMessenger.hh
	modified:   src/NSDetectorConstruction.cc
	modified:   src/NSMaterialConstruction.cc
	modified:   src/NSPrimaryGeneratorAction.cc
	modified:   src/NSPrimaryGeneratorMessenger.cc
	modified:   src/NSSD.cc
	modified:   vis.mac