In “The Conjuring” Patrick Wilson and Vera Farmiga take the roles of paranormal investigators Ed and Lorraine Warren, a Nick and Nora of supernatural troubleshooting. The real-life Warrens are best known in some circles as investigators at Amityville. “The Conjuring” comes from a lesser known incident earlier in their career, a 1971 investigation at a 300-year-old Rhode Island farmhouse. The Perrons--husband, wife, and five daughters