Merge pull request #931 from MathieuLorber/dart1.5

Dart sample fixed

vanilla-examples/vanilladart/pubspec.yaml

@@ -3,4 +3,4 @@ version: 1.0.0
 description: TodoMVC built with Dart. Simple, vanilla Dart.
 dependencies:
   browser: any
-  uuid: 0.2.0
\ No newline at end of file
+  uuid: any
\ No newline at end of file

vanilla-examples/vanilladart/web/dart/app.dart

@@ -3,7 +3,7 @@ library todomvc;
 import 'dart:html'
   show Element, InputElement, KeyCode, KeyboardEvent, querySelector, window;
 import 'dart:convert' show HtmlEscape, JSON;
-import 'package:uuid/uuid.dart' show Uuid;
+import 'package:uuid/uuid_client.dart';
 import 'package:todomvc_vanilladart/models.dart' show Todo;
 
 part 'TodoWidget.dart';