After the visual bombast of many contemporary CG and motion-capture features, the drawn characters in The Princess and the Frog, the Walt Disney Studio's eagerly awaited return to traditional animation, feel doubly welcome. Directed by John Musker and Ron Clements (The Little Mermaid, Aladdin), The Princess and the Frog moves the classic fairy tale to a snazzy version of 1920s New Orleans. Tian…