Update release 1.0.0 metadata

The version number doesn't need to change since it's defined based on
the tag. However we're moving from beta to stable

Change-Id: I698ef473476f705ad9c37df998bfdb8a37506467
Reviewed-on: http://review.couchbase.org/27257
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Tested-by: Mordechai Nunberg <mnunberg@haskalah.org>