The music industry has had a rough week as it faced setbacks on two fronts. Courts in Europe and the U.S. have thrown out attempts by the recording industry to impose restrictions on file sharing software and to track individual users by obtaining information from ISP's. The Dutch Supreme Court on Friday rejected an attempt by the music copyright agency to put controls on Kazaa. Buma Stemra, the Dutch royalties collection society, demanded that Kazaa distribution cease and that future versions …