Added Sync message

Sync message will be sent between peers when a new node connects/joins
the network

network/service/proto/network.proto

@@ -54,7 +54,7 @@ message GraphResponse {
 	Peer root = 1;
 }
 
-message RoutesRequest {	
+message RoutesRequest {
 	// filter based on
 	Query query = 1;
 }
@@ -100,3 +100,13 @@ message Peer {
         // node peers
         repeated Peer peers = 2;
 }
+
+// Sync is network sync message
+message Sync {
+        // node address
+        string address = 1;
+        // node peers
+        repeated Peer peers = 2;
+        // node routes
+        repeated go.micro.router.Route routes = 3;
+}