UTAH Sundance , the highly influential U.S. film festival co-founded by Robert Redford, is moving to a new home in Colorado , organizers said on March 27. For the past four decades, Sundance has been held each winter in Utah's Park City, launching the year's hottest independent movies in the swanky Rocky Mountain ski town amid freezing temperatures at an altitude of 2,150 meters. But as the festival has grown in scale and importance, many attendees have complained it has become prohibitively