udpate changelog
udpate changelog

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