Properly modify channel for child hub subscriptions

lib/hub.js

@@ -14,6 +14,9 @@ try{
 }
 var clientId;
 var excludeMatchingClient = true;
+exports.getSubscribers = function(){
+	return hub;
+}
 exports.publish= function(channel, message){
 	if(!message && typeof channel === "object"){
 		message = channel;
@@ -205,7 +208,28 @@ exports.getMonitored = function(path){
 exports.getChildHub = function(channel){
 	return {
 		publish: addPath(exports.publish),
-		subscribe: addPath(exports.subscribe),
+		subscribe: addPath(function(){
+			var subscription = exports.subscribe.apply(this, arguments);
+			var originalObserve = subscription.observe;
+			var originalOn = subscription.on;
+			subscription.observe = function(callback){
+				originalObserve(function(message){
+					if(message.channel.substring(0, channel.length) == channel){
+						message.channel = message.channel.substring(channel.length + 1);
+					}
+					callback(message);
+				});
+			}
+			subscription.on = function(event, callback){
+				originalOn(event, function(message){
+					if(message.channel.substring(0, channel.length) == channel){
+						message.channel = message.channel.substring(channel.length + 1);
+					}
+					callback(message);
+				});
+			}
+			return subscription;
+		}),
 		unsubscribe: addPath(exports.unsubscribe),
 		fromClient: exports.fromClient,
 		getChildHub: addPath(exports.getChildHub),