Add socket to event-static to reload on open

Add logic to event-static pages which reloads to show the open event if
the event is opened.

Remove the logic on event pages that hides/shows the about pane in
response to the event being opened or closed.  Instead, reload the page
if it is closed and the user isn't an admin.

Update tests to reflect new start/stop conditions.
Fix other create-event tests
Let admins bypass overflow

Fix logic for event routing to allow admins to bypass overflow.  Fix
tests to reflect that you only get the dynamic event page if the event
is open.