Added n2hp model
Added n2hp model

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