By the time the film reels arrive, the sky has darkened and the carnival is bathed in fairy lights. They’re late and everyone is waiting. Carrying them in a jute sack over his shoulder, a harried assistant weaves his way through the crowded fairgrounds and rushes into the largest attraction around: a roomy tent where hundreds have gathered to their dose of cinema for the day. Jutting out of one end of the tent is a vintage green Ashok Leyland truck, its back converted into a projection room. The crowd…