Release 1.2.4

1.2.3 had build errors and was never released.

Change-Id: I307027f87b379f5f9d51add13f94f29563d88120
Reviewed-on: http://review.couchbase.org/36975
Tested-by: Brett Lawson <brett19@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>