Bug 1054437 get involved redesign

Probably needs a bit more polishing and tidying but it's complete enough to start code review.

Run <code>./manage.py cron update_reps_ical</code> to fetch events if you don't already have them.
Yeah, it's just a container for the tooltips, which I then fetch from this box to display in place. There might be a better way to do it, but the intent is that without JS the tooltip icons are still working links to these like footnotes. Maybe the tooltips should just be adjacent to their respective options rather than all together here...