Cities: handling of cities with more than one postal code

For cities with "Municipal Arrondissement" (admin level 9) we take the postal code of
them and affect a range to the corresponding city.
Cities: get the postal code from the admin_centre of a city
proximity_list: correct the name of the place object by using fill_pb_placemark
proximity_list: tests for the name of the place object
ed: fix a crash when there is empty validity period in data.
Kraken: always update working date in stay_in
Kraken: add a recoverable exception so we don't segfault
Jormungandr: fix potential bug in get regions
Version 1.3.1
Merge branch 'release_1.3.1' into release
jormungandr: improve tests
Merge pull request #654 from kinnou02/better_post_code

more postal code for cities
Merge pull request #655 from TeXitoi/correct-places-name

proximity_list: correct the name of the place object by using fill_pb_placemark
Osm: give unique id to poi
Jormung: remove useless log
Merge pull request #656 from antoine-de/remove_useless_log

Jormung: remove useless log
Raptor: the frequencies vector were not used
raptor: filter invalid solutions

fix #485 (https://github.com/CanalTP/navitia/issues/485)
Merge pull request #658 from antoine-de/remove_useless_fields

Raptor: the frequencies vector were not used
Merge pull request #646 from CanalTP/nm_planner

Nm planner - fix this api