Implement timeout handling for node 0.4.x

Since there is no way to reliably abort a request in node 0.2.x this
feature won't be ported back ...

lib/wwwdude/node-versions/v0.4.x.js

@@ -23,7 +23,7 @@ exports.request = function (context) {
   var url = context.url;
   var headers = context.options.headers;
   var payload = context.options.payload;
-  var request;
+  var request, timeoutId;
 
   var options = {
     host: url.hostname,
@@ -40,19 +40,30 @@ exports.request = function (context) {
     headers['Content-Length'] = Buffer.byteLength(payload);
   }
 
+  function handlerWrapper(response) {
+    clearTimeout(timeoutId);
+    context.handler(response);
+  }
+
   if (url.protocol === 'https:') {
-    request = Https.request(options, context.handler);
+    request = Https.request(options, handlerWrapper);
   } else {
-    request = Http.request(options, context.handler);
+    request = Http.request(options, handlerWrapper);
   }
 
   request.on('error', function (err) {
+      clearTimeout(timeoutId);
       context.respond('error', err);
     });
 
   if (payload) {
     request.write(payload);
   }
 
+  timeoutId = setTimeout(function () {
+      request.abort();
+      context.respond('error', new Error('HTTP Timeout was triggered!'));
+    }, context.timeout);
+
   request.end();
 };