It’s not as if Angelina Jolie hasn’t proved her worth as a writer-director before now. Following on from the Bosnian war drama "In the Land of Blood and Honey," and "Unbroken’s" harrowing account of life in a second World War prisoner-of-war camp, Jolie’s fourth narrative feature, confirms her as an exquisite craftswoman and an artist capable of tackling geopolitical complexities. "First They Killed My Father," the official Cambodian selection for the Academy Awards, is based on the memoir of the same name by Loung Ung, whom Jolie befriended in 2002 after the actor became a goodwill ambassador for the UN....