The mega cruft proxy PR (#974)

* the mega cruft proxy PR

* Rename broker id

* add protocol=grpc

* fix compilation breaks

* Add the tunnel broker to the network

* fix broker id

* continue to be backwards compatible in the protocol

server/rpc_event.go

@@ -0,0 +1,33 @@
+package server
+
+import (
+	"github.com/micro/go-micro/broker"
+	"github.com/micro/go-micro/transport"
+)
+
+// event is a broker event we handle on the server transport
+type event struct {
+	message *broker.Message
+}
+
+func (e *event) Ack() error {
+	// there is no ack support
+	return nil
+}
+
+func (e *event) Message() *broker.Message {
+	return e.message
+}
+
+func (e *event) Topic() string {
+	return e.message.Header["Micro-Topic"]
+}
+
+func newEvent(msg transport.Message) *event {
+	return &event{
+		message: &broker.Message{
+			Header: msg.Header,
+			Body:   msg.Body,
+		},
+	}
+}