Saturday, March 26, 2016 8 p.m. to 10 p.m. Location: Collins Center for the Arts, University of Maine, Orono, ME For more information: 1-800-622-8499; collinscenterforthearts.com/event/true-blues-sin-and-redemption/ Two powerful strains of African-American music — blues and gospel — have been interwoven for over 100 years. African slaves, forbidden to play music socially, …