Loudon Wainwright III has spent the past half century writing and performing songs that range from whimsical to confessional to downright silly. This clever man possesses a brilliant wit. His distinctive voice continues to entertain, provoke, and amuse. Now that voice has been transferred to the pages of a candid memoir called "Liner Notes." Wainwright has had a complicated love life. Many of his songs have been informed and inspired by the twisted complexity of his relationships with spouses,