travis: install astropy
travis: install astropy

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