Elliot Tuttle knew that “ Blue Film ,” the fictional story of a camboy who reconnects with a former high school teacher who was fired for sexually assaulting a student, was going to be divisive. After all, it features an empathetic portrait of a pedophile. But he thought some festival would have the courage to screen the incendiary drama. Instead, Tuttle suffered 10 rejections in a row, including hard passes from indie bastions like Sundance and SXSW. “A lot of the feedback that we got behind