Even though he left New Orleans nearly a half-century ago, acoustic legend Chris Smither has practically been a local fixture of late. Last year found Smither in town to record his double-CD, Still on the Levee, which revisits songs from throughout his career with Allen Toussaint, Loudon Wainwright III and other admirers. He returned to play an acclaimed set at the Blues Tent during Jazz Fest, and will be back July 26 at Chickie Wah Wah. Smither’s travels have taken him to the Boston...