residuals.std() now uses only included data
residuals.std() now uses only included data

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