NASHVILLE, Tenn. (AP) — It was a hard year in the bluegrass world and the loss of icons such as Earl Scruggs and Doc Watson hung over the International Bluegrass Music Awards on Thursday night. The Gibson Brothers won entertainer of the year and joined Junior Sisk & Ramblers Choice as the only multiple winners at the ceremony at Ryman Auditorium. But the attention of most was turned toward the pioneers no longer able to attend. An emotional Steve Martin paid tribute to the late banjo innovator Scruggs with a special 30-banjo salute that included many of the world’s top …