After months of speculation, Bugatti has finally pulled the wraps off its new four-door supercar concept just ahead of the Frankfurt Motor Show at an event for past customers and Bugatti-intenders. Up to this point, we've been referring to the French uber-sedan as the Bordeaux, but it seems the actual car's moniker will be Galibier – the name of a difficult Alpine pass along the Tour de France.One of the Galibier's most striking features is undoubtedly...