Chadmin - The Demo Church

- Added the ability to send bulk emails using letter subsciptions.
- Members that are subscribed to a letter with subscription type email can all be sent an email.
- It is possible to add a file attachment to the outgoing email. Attachment size limit can be set in the Server Settings by the system administrator.
- Outgoing email automatically includes a link for unsubscription. Members can unsubscribe from those emails using this link.