(GREAT BARRINGTON, Mass.) – Singer-songwriters Johnny Irion and Kate Taylor will inaugurate the 2012 Troubadour Series of folk music concerts at the Guthrie Center this weekend with performances on Friday, May 25, and Saturday, May 26, 2012, respectively. Doors open both evenings at 6 p.m. and performances begin at 8 p.m. Irion has played and…