GONE ** U.K. / Australia 2006 Dir: Ringan Ledwidge. 84 mins British backpacker and girlfriend (Shaun Evans, Yvonne Sirzechowski) befriend handsome but slightly weird U.S. tourist Scott Mechlowicz in Sydney, and the guy’s increasingly unhinged behaviour escalates from blackmail to violence. Superficial similarities to backpackers-in-peril survivalist horror WOLF CREEK crept…