pkg/dartdoc: moving files around, fix library names

pkg/docgen/lib/src/mdn.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.
+
 library docgen.mdn;
 
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:logging/logging.dart';
 import 'package:path/path.dart' as p;
 
 // TODO(janicejl): Make MDN content generic or pluggable.
 
@@ skipping 41 matching lines @@
   if (mdnType['summary'] == null || mdnType['summary'] == "") return '';
   if (mdnType['srcUrl'] == null) return '';
   return _htmlifyMdn(mdnType['summary'], mdnType['srcUrl']);
 }
 
 /// Encloses the given content in an MDN div and the original source link.
 String _htmlifyMdn(String content, String url) {
   return '<div class="mdn">' + content.trim() + '<p class="mdn-note">'
       '<a href="' + url.trim() + '">from Mdn</a></p></div>';
 }