The new BSL Unplugged concert series kicks off Friday night, Dec. 13, with singer/songwriter Will Kimbrough making his Bay St. Louis debut at the new Longfellow Civic Center on Court Street. To get things going, Libby Rae Watson, formerly of Libby Rae and the Liberaetors, will open for Kimbrough. Doors open at 6:30 p.m. and…