Kudos to Hank Staples the saloonkeeper and talent buyer at the Maple Leaf Bar.  He continues to take chances by booking out of town bands that tend to fly beneath the radar of the funk-obsessed music public of New Orleans. Tonight’s at, Blue Mountain, is now exception.  Formed nearly two decades ago in Oxford, Mississippi, the band was present at the beginnings of the so-called alt-country movement.  Blue Mountain, which features Laurie Stirriatt, the twin sister of Wilco’s John Stirriatt, disappeared from the scene for a number of years, but reunited in 2007, rocks out despite being pigeonholed in the country genre.