adding codereview file, formatting, adding gitignore

lib/src/multiplexport.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * A multiplexing [RawReceivePort].
  *
  * Allows creating a number of [RawReceivePort] implementations that all send
  * messages through the same real `RawReceivePort`.
  *
@@ skipping 28 matching lines @@
   void set handler(void handler(response)) {
     this._handler = handler;
   }
 
   void close() {
     _multiplexer._closePort(_id);
   }
 
   SendPort get sendPort => _multiplexer._createSendPort(_id);
 
-  void _invokeHandler(message) { _handler(message); }
+  void _invokeHandler(message) {
+    _handler(message);
+  }
 }
 
 class _MultiplexSendPort implements SendPort {
   final SendPort _sendPort;
   final int _id;
   _MultiplexSendPort(this._id, this._sendPort);
 
   void send(message) {
     _sendPort.send(list2(_id, message));
   }
@@ skipping 22 matching lines @@
   void close() {
     _port.close();
   }
 
   void _multiplexResponse(list) {
     int id = list[0];
     var message = list[1];
     _MultiplexRawReceivePort receivePort = _map[id];
     // If the receive port is closed, messages are dropped, just as for
     // the normal ReceivePort.
-    if (receivePort == null) return;  // Port closed.
+    if (receivePort == null) return; // Port closed.

[Lasse Reichstein Nielsen, 2015/02/26 10:59:15]

Two spaces before //.

     receivePort._invokeHandler(message);
   }
 
   SendPort _createSendPort(int id) {
     return new _MultiplexSendPort(id, _port.sendPort);
   }
 
   void _closePort(int id) {
     _map.remove(id);
   }
 }