Cary Ann Hearst and Michael Trent had the misfortune of starting their band, Shovels & Rope, in the wake of the mad rush of we-don’t-need-no-stinking-bass duos that ushered in the 2000s. Silly comparisons to the White Stripes followed, when Hearst and Trent clearly had their own lyrical and frayed take on blues and country, soaked in a Southern sense of sweetness and scrappiness.…