AngularJS: finalize overview section

Change-Id: Ifab9632b3a3f11342274d62e9c5c7bd0b601315c
Reviewed-on: http://review.couchbase.org/40979
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>