Added my send_pgp_mime module to the project.

Added my send_pgp_mime module to the project.

This is a bit of a shameless plug, since there's not much motivation
for encrypting bug emails.  However, I've already written it, and it
does send emails, so I'm using it ;).  Perhaps some company will want
to keep the bug submitter's contact information securely in a BE
database.  Anyhow, there's very little reason to _not_ use PGP, and
the module certainly doesn't force you to encrypt anything. ;)