Here are 100 reasons to love the comedy writer, director and star who’s celebrating a milestone on Sunday. No. 1 He started a novel titled “Springtime for Hitler.” No. 2 He turned that into a play. No. 3 He turned that play into a flop film titled “The Producers.” No. 4 He won a screenplay Oscar for that flop … No. 5 … turned that flop into a Broadway hit … No. 6 … then tried to destroy “The Producers” on “Curb Your Enthusiasm.” No. 7 He never did a serious movie because to him comedy was serious. No. 8...