fixed up multiprocessing in cubes
fixed up multiprocessing in cubes

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