By DCist contributor Graham Hough-Cornwell Perhaps you recall the scene from the questionably credible but always engrossing rock doc Dig! where Courtney Taylor of the Dandy Warhols starts talking about how touring – with its requisite marathon drives, partying, and gas station food – can kill a band. He’s talking about the ever-so fragile Brian Jonestown Massacre specifically, but their perpetual demise in the film isn’t exactly new territory in the topsy-turvy world of rock…