refactor imports; minor edits
refactor imports; minor edits

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