SANTIAGO, Chile, Dec 10 (Reuters) - Former dictator Augusto Pinochet, who polarized Chile during his brutal 1973-1990 military rule and spent his old age fighting human rights, fraud and corruption charges, died on Sunday at 91 years old. Thousands of Chileans danced in the streets of the capital while others wept outside the military hospital where he died in a sign of how much Pinochet still divides his country. Police used water cannon and tear gas to keep revelers from getting too close to the government palace. Pinochet, a diabetic who had been in frail health for years, had an...