Former heavyweight champ of the world Joe Frazier has died of liver cancer.  Frazier was the first fighter to defeat Muhammad Ali at the age of 67. Frazier and Ali fought in three of the biggest fights in boxing history during the 1970s.  The epic battles were among the great legends of boxing, with the biggest being the “Thrilla in Manilla.” Frazier was a short, strong fighter who punished even…