Mirror new APIs argument to place(s)_at_address API calls

The following API argument are now handled for the ``place_at_address``
and ``places_at_address``:
 * potential_place
 * origin
 * origin_id
 * call_external_apis (for ``place_at_address`` only)

Signed-off-by: Balthazar Rouberol <balthazar.rouberol@mapado.com>
Merge pull request #3 from mapado/potential-place

Mirror new APIs argument to place(s)_at_address API calls