Cuba's Castro keeps top job but leadership changes to come

By Frank Jack Daniel and Nelson Acosta HAVANA (Reuters) - President Raul Castro will serve a second term as head of Cuba's Communist Party as the island's aging leaders see out a final period in power, amid economic reform and detente with the United States. The Communist Party, which announced the result of internal elections on Tuesday, wants to avoid any chaotic shake-up within its ranks as it wrestles with economic change and a transition from the generation of leaders who fought in the 1959