By Aleksandar Vasovic and Justyna Pawlak BRUSSELS (Reuters) - Serbia and its former province of Kosovo struck an historic deal on Friday to settle their fraught relations, opening the door to European Union membership talks for Belgrade in a milestone for the region's recovery from the collapse of Yugoslavia. EU foreign policy chief Catherine Ashton said the prime ministers of both sides had initialed an agreement during talks in Brussels, capping six months of delicate negotiations after over a decade of deep animosity since Kosovo broke away in war. ...