If there was any doubt left that Alfonso Cuaron was zeroing in on his second Best Director Academy Award at this month’s Oscars, then perhaps that was extinguished over the weekend. Cuaron beat out Bradley Cooper, Spike Lee, Peter Farrelly and Adam McKay at the Directors Guild Awards (DGA) on Saturday, the latest prize in what’s become a successful awards season for him. Cuaron’s picture, Roma, is already hot favourite…