The 26-year-old Briton is banking on a soul-tempering pilgrimage to the world's most arid desert regions - first the Australian Outback then the Middle East - to free him from Edward Cullen's immortal curse.After five films shot in Twilight's netherworld, the softly spoken Pattinson is keen to immerse himself in material that is a little, well, earthier.Futuristic thriller The Rover, which start…