Just weeks after snapping up TweetDeck, Twitter has acquired social analytics start-up BackType. The company’s main product, BackTweets, has helped companies like AOL and Microsoft understand the influence of their tweets. BackType has also been in the midst of developing Storm, a new data-processing tool that the company calls the “Hadoop of realtime processing.” “Joining Twitter gives us the opportunity to bring insight to tens of millions of publishers around the world that are using Twitter to communicate and connect with their audience,” BackType wrote in a blog post. “We’re also…