support non-DB HAFAS backends (WiP)

lib/Travelynx.pm

lib/Travelynx/Command/database.pm

lib/Travelynx/Command/dumpconfig.pm

lib/Travelynx/Command/work.pm

lib/Travelynx/Controller/Account.pm

lib/Travelynx/Controller/Api.pm

lib/Travelynx/Controller/Traveling.pm

lib/Travelynx/Helper/HAFAS.pm

lib/Travelynx/Helper/Sendmail.pm

lib/Travelynx/Helper/Traewelling.pm

lib/Travelynx/Model/InTransit.pm

lib/Travelynx/Model/Journeys.pm

lib/Travelynx/Model/Stations.pm

lib/Travelynx/Model/Traewelling.pm

lib/Travelynx/Model/Users.pm

public/static/js/geolocation.js

public/static/js/travelynx-actions.js

t/22-transit-visibility.t

t/23-journey-visibility.t

t/24-past-visibility.t