It’s hard to find something as universally appreciated and versatile as cement blocks. Today’s Groupon does just that with $15 for $30 worth of French brie, Spanish manchego, Italian parmesan, English cheddar, and American goat cheeses among the 150+ offerings from around New England and the world at Boston Cheese Cellar. The one-stop gourmet shop is located just south of the city in Roslindale Village.