Fix searching the nearby stops & Enable choice of sources
Summary:
- Fix not searching the nearby stops
- Enable choice of fetchers for arrival times. Set default values on start (if the values are empty).
- Dynamically adapt fetchers based on settings
- Fix JSON adapter, so that we have all passaggi.
- Give realtime arrivals first for GTT JSON fetcher
Reviewers: valerio.bozzolan
Reviewed By: valerio.bozzolan
Subscribers: valerio.bozzolan, Libre BusTO
Tags: Libre BusTO
Differential Revision: https://gitpull.it/D95