Did a cork pop? Did the world stop? Am I just in love…with the music and lyrics of Hugh Martin? Even if you don’t know the name of the late Mr. Martin, you certainly know his songs: “Meet Me in St. Louis,” “The Trolley Song,” and a little song heard every season, year after year, by the name of “Have Yourself a Merry Little Christmas.” But these songs from the MGM musical Meet Me in St. Louis are just the tip of the iceberg of Hugh Martin’s catalogue, a few highlights of a career that lasted