Country superstar Chris Stapleton has added dates to his "All-American Road Show" tour. The eight-time Grammy Award-winner announced new dates at Tuscaloosa's Tuscaloosa Amphitheater, Orange Beach's The Wharf Amphitheater, Gilford's Bank of New Hampshire Pavilion, and Houston's Cynthia Woods Mitchell Pavilion. Tickets for the new dates go on sale Friday, April 15 at 10 am…