(Reuters) - Gunfire rang out, mosques were attacked and Muslim-owned shops and houses were looted overnight in Central African Republic's capital, and the former president left for exile in Benin after stepping down as part of a drive to restore order. There were hopes that the change of leadership might provide a fresh start to peace efforts, and violence had eased by daybreak on Saturday. But the United Nations stepped up flights out for foreigners. Governments of other African countries have evacuated nearly 30,000 of their citizens caught up in the violence. President Michel Djotodia and Prime Minister Nicolas Tiangaye...