“It is truly a dream come true,” says Reed Van Dyk , whose directorial feature debut, “Atonement,” unspools in Directors’ Fortnight . “If I had any dream in film, it was to present a movie at Cannes, and I have a long-standing relationship with this section of the festival. There’s been a lot of movies from Fortnight that, as I’ve come of age as a filmmaker, have meant a lot to me and taught me a lot about film craft.” CAA Media Finance and Goodfellas are handling sales on the film, which stars