user activity stats (usergroup specific)

[SaltedSlug]

An addon for 3.6.x that alows admins (perhaps optionally everyone) to seen how active people are, per usergroup.

For example, it would show how many people per usergroup were online today. And yesterday, and the past week, the past month, maybe even 6 months, or a year.

It would also be nice to have a public display of how many users are in each usergroup - in percentages and in numbers. For example, it would be a pie chart or similar chart, and it would show both the percentage and number of users - each segment of the pie representing a usergroup.

And importantly, the option to only include specific usergroups. For example, I might specify that I only want to draw the data from usergroups 4, 5, 6, and 7.