counts particles now, maybe binary search for vector
	modified:   include/NSHit.hh
	modified:   src/NSEventAction.cc
	modified:   src/NSPrimaryGeneratorAction.cc
	modified:   src/NSRunAction.cc
	modified:   src/NSSD.cc
forgot minor changes and photons are saved in ntuple now!
	modified:   src/NSEventAction.cc
	modified:   src/NSRunAction.cc
	modified:   src/NSSD.cc