NEW HAVEN — Who’s that coed looking so chic? Yale University senior Barbara Bush, of course. She’s working the vintage-y side of style, while bringing a hint of Texas flair to the New Haven campus with her gold-tipped cowboy boots. Fab? You bet. But not enough to catapult Yale to the top spot of WWD’s ranking of Ivy League style. To find out who’s number one, and for more about what’s happening on-campus nationwide, see today’s section WWDThe College Issue.