The words South Street Seaport and hip have never been strung together by a New Yorker. That’s changing: the cool factor is rising in the cobblestoned historic district downtown, which was hit hard by Superstorm Sandy. Now in-the-know residents are watching outdoor movies, browsing pop-up shops, and sharing tables with tourists at SmorgasBar, a new spin-off of Brooklyn’s red-hot bazaar Smorgasburg. Through October, vendors cook up everything from lobster rolls to bulgogi burgers, while drinks such as bourbon-spiked slushies are served out of former shipping containers. That’s what we call precious cargo.