A highly competent, witty playwright, screenwriter and director, Garson Kanin is perhaps best-remembered for his 1945 Broadway smash "Born Yesterday" and for the scenarios he wrote for others, especially George Cukor.The Rochester, NY, native dropped out of high school in 1929 and worked in vaudeville as a musician and comic. After training at NYC's American Academy of Dramatic Arts, he made his Broadway acting debut in "Little Ol' Boy" (1934), directed by George Abbott. Kanin left acting to serve as Abbott's production assistant, working on "Room Service" (1937), among others. He moved to