Sessions metric

The next update is going to include the sessions metric. Here's how it works in case you're unfamiliar with this metric: Sessions group views that take place during one visit. For instance, if someone visited your blog, read five posts, and left, this would be counted as 1 visitor, 5 views, and 1 session. If they returned the next day and viewed one more page before leaving, this would result in a total of 1 visitor, 6 views, and 2 sessions. Sessions are useful in their own right, but they're also an important metric for us to include because they open up the possibility for other highly requested metrics, such as pages per session and average session duration. We have already implemented session tracking behind the scenes in version 1.17, so when we release this feature, you should already have a few weeks worth of data.