minor update to ammonia model - next step is to produce it using the model Class
minor update to ammonia model - next step is to produce it using the model Class

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