Downtown LA’s Central Market is getting hipper by the minute. You can now have vertically responsible hamburgers (Bel Canto), gourmet coffee (G&G), small batch pastrami (Wexler’s), and heavenly ice cream (McConnell’s), and now, at  The Oyster Gourmet,my friend Christophe Happillon’s new pop-up (and I mean that literally, the kiosk pops…