Improve Node dgram signatures.

node/node.d.ts

@@ -760,13 +760,25 @@ declare module "net" {
 declare module "dgram" {
     import events = require("events");
 
-    export function createSocket(type: string, callback?: Function): Socket;
+	interface RemoteInfo {
+		address: string;
+		port: number;
+		size: number;
+	}
+	
+	interface AddressInfo {
+		address: string; 
+		family: string; 
+		port: number; 
+	}
+	
+    export function createSocket(type: string, callback?: (msg: Buffer, rinfo: RemoteInfo) => void): Socket;
 
     interface Socket extends events.EventEmitter {
         send(buf: Buffer, offset: number, length: number, port: number, address: string, callback?: (error: Error, bytes: number) => void): void;
         bind(port: number, address?: string, callback?: () => void): void;
         close(): void;
-        address: { address: string; family: string; port: number; };
+        address(): AddressInfo;
         setBroadcast(flag: boolean): void;
         setMulticastTTL(ttl: number): void;
         setMulticastLoopback(flag: boolean): void;