Migrate to package:html

lib/src/codegen/html_codegen.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.
 
 library dev_compiler.src.codegen.html_codegen;
 
-import 'package:html5lib/dom.dart';
-import 'package:html5lib/parser.dart' show parseFragment;
+import 'package:html/dom.dart';
+import 'package:html/parser.dart' show parseFragment;
 import 'package:logging/logging.dart' show Logger;
 import 'package:path/path.dart' as path;
 
 import 'package:dev_compiler/src/dependency_graph.dart';
 import 'package:dev_compiler/src/options.dart';
 import 'package:dev_compiler/src/utils.dart' show colorOf, resourceOutputPath;
 
 import 'js_codegen.dart' show jsLibraryName, jsOutputPath;
 
 /// Emits an entry point HTML file corresponding to [inputFile] that can load
@@ skipping 76 matching lines @@
 }
 
 /// Convert the outputPath to include the hash in it. This function is the
 /// reverse of what the server does to determine whether a request needs to have
 /// cache headers added to it.
 _addHash(String outPath, String hash) {
   return path.join('cached', hash, outPath);
 }
 
 final _log = new Logger('dev_compiler.src.codegen.html_codegen');