Use kurviger.de routing API for motorcycle routes
kurviger.de provides a GraphHopper routing api optimized for motorcycle routes. See https://kurviger.de/api_use Since motorcyclists prefer vastly different routes than cars, this functionality might open up Locus to new users and optimize the routing for current users. Motorcycle routing apps are in demand, see: "Calimoto" app. When implementing this functionality it would be nice to have all routing options available (fast route, curvy route, avoid ... and possibly roundtrips).