The recent MLK biopic, Selma, is both powerfully resonant yet full of clichés. Gemma Pecorini Goodall reviews. Ava DuVernay’s (Middle of Nowhere, I Will Follow) biographical new film Selma depicts the 1960’s campaign of Rev. Martin Luther King Jr. (David Oyelowo) and the Afro-American people’s trials and tribulations to attain the right to vote in the…