Dear Bagistas,Despite blistering cold weather, Jason Wu wowed a packed house. He kicked off the show with a black brocade dress, but it was the mix of golden-mustard and butter-yellow hues that really popped out at me. A gold cocktail dress with metallic bodice and button detailing, a satin gold dress with a pleated skirt and a black organza underskirt, a yellow chiffon gown capped with a mink…