Author Andrew F. Smith (on the right) getting ready to go on stage.One of the most interesting statistics in Andrew F. Smith's book Hamburger: A Global History is that one in eight people in America have worked at McDonald's. While I am not part of that 12.5 percent (Smith is) I'm interested in McDonald's and the hamburger story, which is why I went to hear him speak at the Plaza Library. The e-mail about free Westport Flea Market burgers also didn't hurt.As advertised, the Flea Market was givin