Introduce a new navigation bar to allow going through the different
types of reports:

- Change the page title according to the selected report section and
  report
- Decide which columns to display in a report
- Configure reports via the "Configure reports" button

Add existing reports into the new interface.

Create new and expand existing reports:

- User activity
- Page activity
- Collaboration

Sponsored by the AAIM project with funding from University of
Sussex and Dublin City University.

Change-Id: I1eb6920890af27c34c902fe22ff5ce3591b73cb0
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>