* Don't apply `tx=commit` if the transaction doesn't commit
* Apply `count=exact`
* Also simplifies the Preference-Applied logic, removing the need for
some functions.
fix: bug when using Range header on PATCH/DELETE
- Fix the "message": "syntax error at or near \"RETURNING\"" error
- Fix doing a limited update/delete when an order query parameter was present
breaking: The Range header is now only considered on GET requests and is ignored for any other method
- Other methods should use the `limit/offset` query parameters for sub-ranges
- PUT requests no longer return an error when this header is present
BREAKING CHANGE: For the cases where one to one relationships are
detected, json objects will be returned instead of json arrays of length
1.
If you wish to override this behavior, you can use computed
relationships to return arrays again.
* limited update/delete now works on views with explicit order
* no default order, enforce order presence
* apply row count to ensure limited mutations
* move requiring order to ApiRequest
Wolfgang Walther