Don't leak ActiveSync exceptions up from the Rpc layer.
Don't send the MAIL_SUBMISSION_FAILED response for EAS < 14.0

It's not supported before 14.0, a HTTP 500 is expected (though as
usual, a whole bunch of clients ignore the "SHOULD NOT TRY AGAIN"
meaning of this error and continue to try the same request.
Fix lazy loading of imap message during SMART requests.
Don't attempt to fetch the IMAP message if this isn't a SMART request.
Extract Horde_ActiveSync_Mime::
Add support for Horde_ActiveSync_Exception_EmailFatalFailure::

Thrown when sending of the EAS email message fatally, and permanently fails.
Add the activesync_email_presend hook.

Add hook and example code for preventing attachments with viruses from
being sent over EAS.
Update package.xml and bump versions.