added utils import
added utils import

keflavich/pyspeckit,e-koch/pyspeckit,allisony/pyspeckit,jpinedaf/pyspeckit,mikelum/pyspeckit,low-sky/pyspeckit,vlas-sokolov/pyspeckit,vlas-sokolov/pyspeckit,pyspeckit/pyspeckit,keflavich/pyspeckit,low-sky/pyspeckit,allisony/pyspeckit,mikelum/pyspeckit,bsipocz/pyspeckit,dinossimpson/pyspeckit,jpinedaf/pyspeckit,e-koch/pyspeckit,pyspeckit/pyspeckit,dinossimpson/pyspeckit,keflavich/pyspeckit-obsolete,bsipocz/pyspeckit