Adding 10.9.x UUIDs.

It looks like I missed the MessageCompatibility UUID for 10.9.0.  Also,
I suspect my work laptop may be running non-standard builds.  Run the
following if the bundle doesn't work, and send me the UUIDs:

defaults find UUID | grep MailCompatibility
defaults find UUID | grep MessageCompatibility
Updating latest build for 10.9.1.