Add Route result model

The Route result model encapsulates all data that makes a route in our
application.

https://bugzilla.gnome.org/show_bug.cgi?id=728695
Add a Route query model

This will represent the route query state in the app.

https://bugzilla.gnome.org/show_bug.cgi?id=728695
Add RouteService module

Add a RouteService module with a GraphHopper class as only implementation.

https://bugzilla.gnome.org/show_bug.cgi?id=728695
Application: make RouteService a global

Make the route service a global service.

https://bugzilla.gnome.org/show_bug.cgi?id=728695
Mapview: Add support for showing routes

Connect to the route model and when it changes also update the map.

https://bugzilla.gnome.org/show_bug.cgi?id=728695
TEMP: Test the routing

https://bugzilla.gnome.org/show_bug.cgi?id=728695
Make GeoClue a global service

Move GeoClue out from mapView and put it together with the other services.
GeoClue: Remove trailing comma
MapLocation: Add route search button

Make it possible to make simple route searches via location bubbles.
More advanced searches will have to be made via the sidebar.