Refs #102 - Implement email whitelisting.
Refs #102 - Implement and test whitelisting on Mandrill Sender.
Refs #102 - Set config on Mandrill sender.

Stop filtering sender email.
Refs #102 - Fix tests.
Refs #102 - Make config variable name more succinct.
Refs #102 - Make config variable name more succinct in test.
Refs #102 - Make config variable name more succinct in test.
Merge pull request #102 from synapsestudios/feature/102-email-whitelist

Email Whitelist