Kraken: vls station in placemark

add the vls station in the protobuff instead of just it's adresse
Kraken: small corrections on pois
Kraken: corrections after review
Jormungandr: filter similar journeys

add final filter to filter similar journeys, for example many path
without public transport (just walking, biking, ...)
Merge pull request #349 from antoine-de/NAVITIAII-770

Navitiaii 770
Merge pull request #350 from antoine-de/fix_journeys_filter

Jormungandr: filter similar journeys