added bib ref in nohalo code
added bib ref in nohalo code

wishabi/libvips,leiyangyou/libvips,wishabi/libvips,lovell/libvips,lovell/libvips,mcanthony/libvips,leiyangyou/libvips,wishabi/libvips,jcupitt/libvips,wishabi/libvips,mcanthony/libvips,jcupitt/libvips,jcupitt/libvips,leiyangyou/libvips,mcanthony/libvips,lovell/libvips,lovell/libvips,leiyangyou/libvips,mcanthony/libvips,jcupitt/libvips