Maysles interviews such designers as Alexis Bittar, Duro Olowu, Naeem Khan, and Dries van Noten, Met curator Harold Koda, Architectural Digest editor in chief Margaret Russell, and J. Crew head Jenna Lyons, who have only the most kind and generous things to say about the always positive Apfel, who has a genuine love of life. ???It???s better to be happy than well dressed,??? she tells friend and p