Add optional opaque "service" parameter to verification emails.
Merge pull request #342 from mozilla/rfk/rpid-in-email-links

Add optional opaque "rpid" parameter to verification emails.
use ass for code coverage - issue #94
Merge pull request #446 from lloyd/master

use ass for code coverage - issue #94
Stop sending bound emails to rfkelly; there's only noise in there.
awsbox needs a verified sender address