Grammy Award-Winning act Bon Iver recently announced a 23-date U.S. tour with a stop at the St. Augustine Amphitheatre in April. The critically acclaimed project of singer-songwriter and producer Justin Vernon, Bon Iver emerged as one of the most successful indie-folk acts to emerge of the early 2000s. The sparse yet dynamic For Emma, Forever Ago––Vernon’s debut as Bon Iver––was …