valhalla implementation changes

routing.go

@@ -20,16 +20,16 @@ func NewRoutingService(service_type string, baseUrl string) (RoutingService, err
 }
 
 type Route struct {
-	Summary RouteSummary
+	Summary
 	Legs    []RouteLeg
 }
 
-type RouteSummary struct {
-	Polyline string
-}
-
-type RouteLeg struct {
+type Summary struct {
 	Distance float64
 	Duration time.Duration
 	Polyline string
 }
+
+type RouteLeg struct {
+	Summary
+}