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 10:53:52AM -0700, Brian Sadler wrote:
> It looks like this email is hooked up?  If so, we probably want to implement the START and END placeholders to avoid accidentally emailing users

Yeah, for staging purposes it is there. I don't know the correct times yet, let me ask.