Add footer, use it to display status

Add a footer to the UI, and within it, display status of the updater.

Create a Status model, and "offline" create a single status document
which will be updated each time the updater runs.  The status document
contains the last time updated and the duration of time the updater
takes to run.
Create status if it does not exist

Create a status if one doesn't exist, to avoid any problems.
Update the cron job to run every 6 hours

At least in theory this should work...