Acceptance flow

This is the basic version of it with database additions, control buttons on admin (with the view user page cleaned up just a little), and the user-side confirm thing. Some text is placeholder like the doodle link.

As of first push, this doesn't automatically send emails. I want to get that working in the morning, but if it isn't done in time, we can still manually send them with mail merge or whatever, so this PR - once the placeholders are swapped out - can represent a MVP.
On Fri, Sep 12, 2014 at 11:05:22AM -0700, Brian Sadler wrote:
> Ideally, we'd use Rails helpers.  Not a big deal though.

I couldn't get them to work inside the admin section, they kept wanting
to link back outside the /admin namespace. Same with the form helpers.

Probably needs :as stuff added to the routes file, but I couldn't figure it
out in a reasonable time yesterday.