As the August anniversary of Woodstock approaches, the Rock & Roll Hall of Fame and Museum in Cleveland is taking a look back at rock’s historic fest in a new exhibit that opens tomorrow called “Woodstock: The 40th Anniversary.” Go behind the scenes with curator Howard Kramer as he outlines some of its highlights — like the vest fest co-producer Michael Lang wore all three days of peace, love and rock & roll as well as the documents listing who was playing and how much they were paid. The exhibit, which runs through late November, also includes a press release from when the fest was scheduled to go down at Wallkill, New York (”Woodstock does not figure on gate ...