BLOEMFONTEIN, South Africa (Reuters) - South Africa's ruling African National Congress (ANC) re-elected President Jacob Zuma as its leader on Tuesday, setting him up for seven more years as head of state of Africa's biggest economy. Nelson Mandela's 100-year-old liberation movement also chose respected businessman Cyril Ramaphosa as his deputy, seeking to repair the image of a Zuma administration battered by corruption scandals and strikes and facing growing discontent among the poor black majority. ...