JVMCBC-59: Add support for spatial queries.

Change-Id: Ic00f139b0a330642dae5478b7f5fdc8cf65bbc3f
Reviewed-on: http://review.couchbase.org/44181
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Reviewed-by: Simon Baslé <simon@couchbase.com>