refactor per #503, fixing supervise and supervise_as handling of arguments
refactor per #503, fixing supervise and supervise_as handling of arguments

dilumn/celluloid,olleolleolle/celluloid,jasonm23/celluloid,marshall-lee/celluloid,TiagoCardoso1983/celluloid,celluloid/celluloid,seuros/celluloid,davydovanton/celluloid,kenichi/celluloid