The nerds aren’t nerdy enough in Rick Famuyima’s eagerly awaited tale of three hip-hop-loving teenagers heading for troubleIs 2015 a bad vintage for American independent movies? This time last year we had Richard Linklater’s transcendentally simple Boyhood to enthuse about, a breakout hit from Sundance. And although Linklater’s hopes were not entirely fulfilled on Oscar night, pundits and awards voters always like to feel that among the glitz and bling of prizegiving ceremonies there will always be, metaphorically speaking, some indie underdog stubble among the sleek tuxed throng.Dope is a case in point: a movie executive-produced by Sean Combs and written and directed by Rick Famuyiwa.