Make Reply-To config apply to change e-mail confirmation and other notifications sent through Devise
Notifications sent through Devise were using the default From: address, and due to a broken test line nothing was actually being run.
The only way to customize the Devise Reply-To field is to use a custom mailer. Moved the e-mail configuration out of the initializers to accommodate this.
Closes #1556 (closed)
CC: @rspeicher, @stevenorman