Arriving this week on DVD and Blu-ray: the classic Breakfast at Tiffany’s debuts on Blu-ray starring Audrey Hepburn as the one-and-only Holly Golightly; Kristen Wiig and Maya Rudolph joke it up in the comedy, Bridesmaids; Disney’s animated classic, Dumbo, celebrates its 70th anniversary; plus reviews of Terry Pratchett’s Going Postal and Thor.