Added event for login as well as original dlr pdus in the response callback

lib/server.js

@@ -61,6 +61,7 @@ function login(pduObj) {
 			}
 
 			that.sock.resume();
+			that.emit('login');
 			that.sendReturn(pduObj);
 		});
 
@@ -70,6 +71,7 @@ function login(pduObj) {
 	// If we arrived here it means we are not logged in and that a bind_* event happened and no checkuserpass() method exists. Lets login!
 	this.loggedIn = true;
 	this.sock.resume();
+	this.emit('login');
 	this.sendReturn(pduObj);
 }