one-liners for a few polymer-related libraries

pkg/mdv/lib/mdv.dart

 // Copyright (c) 2013, 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.
 
 // TODO(jmesserly): more commentary here.
 /**
- * This library provides access to Model-Driven-Views APIs on HTML elements.
- * More information can be found at: <https://github.com/Polymer/mdv>.
+ * Template and node binding for HTML elements.
+ *
+ * This library provides access to the Polymer project's
+ * [Template Binding](http://www.polymer-project.org/platform/template.html) and
+ * [Node.bind()](http://www.polymer-project.org/platform/node_bind.html) APIs.
+ * Find more information at the
+ * [Polymer.dart homepage](https://www.dartlang.org/polymer-dart/).
  */
 library mdv;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html';
 import 'package:observe/observe.dart';
 
 import 'src/list_diff.dart' show calculateSplices, ListChangeDelta;
 
@@ skipping 71 matching lines @@
   } else if (node is Node) {
     wrapper = new _NodeExtension(node);
   } else {
     // TODO(jmesserly): this happens for things like CompoundBinding.
     wrapper = node;
   }
 
   _mdvExpando[node] = wrapper;
   return wrapper;
 }