Happy first weekend of September – and happy Labor Day weekend, too, for our American cities! Let’s take a look at what’s been happening around the Ist-a-verse. The deaths of two firefighters shook Bostonist this week. Boston’s firefighters bent over backwards all week long – first, they fought flames pouring from the Boston Tea Party museum, and then a restaurant fire killed two and injured many more. Their efforts make everything else – like Tom…