Embedded NATS Broker (#1110)

* if the address is produced by a default route don't hash it

* embedded nats

* fix url parsing

* don't override help

* add ready flag

defaults.go

@@ -1,17 +1,24 @@
 package micro
 
 import (
+	"github.com/micro/go-micro/broker"
 	"github.com/micro/go-micro/client"
 	"github.com/micro/go-micro/server"
 	"github.com/micro/go-micro/store"
 
 	// set defaults
+	"github.com/micro/go-micro/broker/nats"
 	gcli "github.com/micro/go-micro/client/grpc"
 	gsrv "github.com/micro/go-micro/server/grpc"
 	memStore "github.com/micro/go-micro/store/memory"
 )
 
 func init() {
+	// default broker
+	broker.DefaultBroker = nats.NewBroker(
+		// embedded nats server
+		nats.LocalServer(),
+	)
 	// default client
 	client.DefaultClient = gcli.NewClient()
 	// default server