routing: GraphHopper interface change for allowing viapoints

Change routing query and interface with GraphHopper service for
adding viapoints support.
Remove query properties to and from and add a new property viapoints
that is a coordinates array.
A query is legal if there are at least two viapoints.

https://bugzilla.gnome.org/show_bug.cgi?id=731068

Conflicts:
	src/routeQuery.js
	src/routeService.js

Conflicts:
	src/routeService.js

Conflicts:
	src/routeQuery.js

Conflicts:
	src/routeQuery.js
sidebar
New markers for turnpoint

Conflicts:
	src/route.js

Conflicts:
	src/route.js
Changed on here button

Conflicts:
	src/mapLocation.js

Conflicts:
	src/mapLocation.js