particle generation works as expected
	modified:   NS.out
	deleted:    bin/Linux-g++/NeutronShielding
	modified:   src/NSDetectorConstruction.cc
	modified:   src/NSPrimaryGeneratorAction.cc
	modified:   vis.mac
ignore bin/
	modified:   .gitignore
	deleted:    bin/Linux-g++/NeutronShielding_jpa