added sketch of a .fits writer; it is not yet functional
added sketch of a .fits writer; it is not yet functional

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