Added ReplyInfoVerifier. Also some tests.
Remove commented routes in routes.rb
WIP: /api/private/reply based on Mailgun forwarding
Notify subscribers when a new post is made via email
Add reply-to with reply_info to emails
Include concerns
Use implicit Ability
Use mail.community rather than reply.community
Add note about replying via email
Verify Mailgun origin
Merge branch 'reply-to-emails'