Basic utilization report

[spoulson]

Build a page showing up to the moment aggregations of the last 30 days of activity:

Aggregate data sets by unit of time:

• Per day.
• Per hour (last 7 days).
• Per hour of the day.
• Per day of the week.

With series:

• Sessions created.
• Average session duration.
• Total session duration.

Data sets can be shown as tables. Charting is a nice to have.