Saman Salur’s brilliant black-and-white Chand kilo khorma baraye marassem-e tadfin, from Iran, is emotional and tremendously moving, even as its affinity with Samuel Beckett and early Roman Polanski is apparent.      The principal setting, beset with wintry snow, is an unpatronized gas station in the middle of nowhere. Mr. Sadry prays to God for more snow […]