Improves 'ext.MailExtension' class to add support for configurations.
Features
- Improved 'ext.MailExtension' class to add support for configurations, including the first early draft of PDF/mail-1s.
- Included 'javax.mail' and 'javax.activation' in the bundle Jar, to allow conversion of RFC822 email to PDF without any additional Jars.
- Added '-bfo-layer-type:' file to create a file attachment.