By Denny Dyroff, Entertainment Editor, The Times Livingston Taylor Livingston Taylor has a lot of musical talent – and a knack for longevity. Taylor, who will be headlining a show on April 9 at Delaware Valley University (700 East Butler Avenue, Doylestown, is a singer-songwriter who made his first album 52 years ago and has released more than 20 more LPs since then. Taylor has a long history of...