Can you go ahead and fix the part of #71 that points out that this query includes unverified emails?  Seems serious enough to me to address sooner rather than later.  Also should be a 5-minute fix.

I think that `UsersWithEmails#all` should (for safety) only include verified emails by default and take an options hash with `included_unverified: true` if someone wants to include unverified emails.