Clothing featured in the hit PBS television series “Downton Abbey” arrives at the Taft Museum of Art this summer, offering a look at how the show used wardrobe to portray the evolution of fashion and provide hints about its characters’ inner lives. Dressing-Up-and-Down--1 Dressing-Up-and-Down--2 Dressing-Up-and-Down--3 Dressing-Up-and-Down--4