Pope's cat writes purrfect book BY STEPHANIE GASKELL DAILY NEWS STAFF WRITER Sunday, April 20th 2008, 4:00 AM There's one very unusual biography of Pope Benedict - a children's book, supposedly written by his cat."Joseph and Chico: The Life of Pope Benedict XVI as Told by a Cat" is a 36-page illustrated book that chronicles the life of Benedict through the words of his cat, Chico. "I'm meeting you in the pages of this book to tell you a story about my very best friend, a wonderful man with whom I've shared so many happy times," Chico says. "I...