Fixing librarin-puppet dev function for update
Adding mjhas's Postfix, Dovecot, ClamAV, AMaViS modules
Updating Krikkit's classes for mail server
Configuring AMaViS
Configuring Dovecot
Configuring Postfix

This was intense. The configuration is based on research from the
following things:

http://dbpmail.net/essays/2013-06-29-hackers-replacement-for-gmail.html
https://www.digitalocean.com/community/articles/how-to-set-up-a-postfix-e-mail-server-with-dovecot
https://github.com/mjhas/mailserver/blob/master/manifests/init.pp
https://help.ubuntu.com/community/PostfixAmavisNew
Opening SMTP ports
Removing postfix::server from Vagrant