minor fix in cube reader: squeeze before cubing
minor fix in cube reader: squeeze before cubing

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