"Let's Live for Today," a top ten U.S. hit in the Summer of Love, will forever be associated with The Grass Roots. But not one, but two, U.K.-based groups also staked a claim to the song. Now, Cherry Red's Grapefruit arm is chronicling the discography of one of those groups, Living Daylights. The single-CD anthology Let's Live for Today: The Complete Recordings is due this Friday, August 12. Living Daylights - a.k.a. brothers Garth and Norman Watt-Roy on guitar and bass, respectively, plus