Finally, instead of opening with a British Film Institute certificate of acceptance (or however it’s phrased), Hitchcock’s first American production kicks off with Selznick International Picture fanfare as he begins this new chapter in his career. Oddly enough, though, “Rebecca” still feels very British. The style of the performances and some of the very British mannerisms still exist here, but there’s one notable difference: The budget. Hitchcock now gets some of that Hollywood money and certainly makes the most of…