By Lefteris Papadimas and Angelo Amante CORFU, Greece (Reuters) -Twelve people are still missing after a blaze swept through a ferry sailing from Greece to Italy early on Friday, Greek authorities said on Saturday, as firefighters battled for a second day to control the fire. Reuters live footage showed plumes of smoke pouring out of the Italian-flagged Euroferry Olympia as firefighters from a nearby vessel sprayed water onto the burning ferry in the Ionian Sea. A total of 241 passengers and 51 crew were on board when the blaze broke out early on Friday and rescue vessels moved most of the 280…