update changelog for #152
update changelog for #152

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