Now that the semester has calmed down a bit, I’m just getting caught up on HBO’s new series, “Boardwalk Empire.” Even this early on, I can tell you, it’s a humdinger. Of course, it’s HBO, so there’s lots of profanity, lots of blood, and lots of skin. But Steve Buscemi is absolutely compelling, and the story line has more hooks than a mackerel jig. And for the sartorially-minded among us, well, there’s plenty to look at.