Like the bittersweet documentary they soundtrack, these demos, live versions, and alternate takes trace Amy Winehouse’s turbulent path, and are punctuated by Antonio Pinto’s considered mood pieces. The staggering potential on 2004’s “What Is It About Men (Live at North Sea Jazz Festival)” is magnificently realized by “We’re Still Friends (Live at The Union Chapel).” Inevitably though, her careworn vocal on 2011’s Tony Bennett duet “Body and Soul” betrays darker struggles.