Attendee table

This branch incorporates the CSV field handling into the attendee table display, which lets us use a single filter/update form for the entire page. I also did some moving around / consolidating of content to allow maximum horizontal space for management (in particular attendee management.) A couple things that could be improved before or after this is merged:

1. make scrolling on attendee page horizontal only.
2. Add display of current management page title to masthead so people don't have to just key off the nav.