Corbyn calls for unity after winning Labour leadership vote

By Elizabeth Piper and Kylie MacLellan LIVERPOOL, England (Reuters) - Jeremy Corbyn was re-elected leader of Britain's opposition Labour Party on Saturday and called for unity after ending a "coup" by more centrist members of parliament who say his left-wing agenda can never deliver victory at the polls. The veteran campaigner's triumph, by 313,209 to 193,229 votes, over challenger Owen Smith cements his authority over the divided party and will fuel a drive further left - a move many members of