MB-12095: Change default values for spatial views

Spatial views don't need a bounding box anymore. If none is defined the
full data set is returned. Additionally spatial views support skip and
limit to page through the results.

Change-Id: I061074d8b3c077fae7de90002ab23f0f5fee197a
Reviewed-on: http://review.couchbase.org/41081
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>