Move query and result into classes. Add osrm args scanning. Add GPX return
Move query and result into classes. Add osrm args scanning. Add GPX return

Signed-off-by: Eliot Blennerhassett <642fc6007ae33170f7cf66a865a897c5fb2c55c7@Blennerhassett.gen.nz>

eliotb/navigation-server-proxy