Add methods to Result. Bump version to 2.0 and remove deprecated features.

lib/src/stream_queue.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.
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:collection/collection.dart';
 
 import "cancelable_operation.dart";
-import "result.dart";
+import "result/result.dart";
 import "subscription_stream.dart";
 import "stream_completer.dart";
 import "stream_splitter.dart";
 
 /// An asynchronous pull-based interface for accessing stream events.
 ///
 /// Wraps a stream and makes individual events available on request.
 ///
 /// You can request (and reserve) one or more events from the stream,
 /// and after all previous requests have been fulfilled, stream events
@@ skipping 830 matching lines @@
   }
 }
 
 /// Request for a [StreamQueue.cancel] call.
 ///
 /// The request needs no events, it just waits in the request queue
 /// until all previous events are fulfilled, then it cancels the stream queue
 /// source subscription.
 class _CancelRequest<T> implements _EventRequest<T> {
   /// Completer for the future returned by the `cancel` call.
+  /// TODO(lrn); make this Completer<void> when that is implemented.
   final _completer = new Completer();
 
-  ///
   /// When the event is completed, it needs to cancel the active subscription
   /// of the `StreamQueue` object, if any.
   final StreamQueue _streamQueue;
 
   _CancelRequest(this._streamQueue);
 
   /// The future completed when the cancel request is completed.
   Future get future => _completer.future;
 
   bool update(QueueList<Result<T>> events, bool isDone) {
@@ skipping 96 matching lines @@
   }
 
   bool update(QueueList<Result<T>> events, bool isDone) {
     while (_eventsSent < events.length) {
       events[_eventsSent++].addTo(_controller);
     }
     if (isDone && !_controller.isClosed) _controller.close();
     return false;
   }
 }