New Thread Email 1.6

New Thread Email v1.6 changes:

Remove unused template.

New Thread Email v1.5 changes:

Added Exclude User ID field into Options. This way when staff moves a thread an email is not sent.

Changes to Thread Email v1.4

1) Now using XenForo mail transport
2) Better looking emails
3) One less field to fill out in the Option page

Updated email sending code.

Some admins were having trouble using the XenForo email sending code, so I reverted back to the PHP email sending code.

Added code to support SMTP email transport.

Fixed bug so email sent only when creating a new thread.