Release 0.161

Fix failure when describing the output of prepared statements that contain aggregations.
Fix column resolution rules for ORDER BY to match the behavior expected by the SQL standard. This is a change in semantics that breaks backwards compatibility. To ease migration of existing queries, the legacy behavior can be restored by the config option or the legacy_order_by session property.
Improve error message when coordinator responds with 403 FORBIDDEN.
Improve performance of when one argument is empty.
Remove /v1/execute resource.
Add to construct an empty MAP.