Get rid of all the library tags.

lib/src/message.dart

 // Copyright (c) 2014, 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 shelf.message;
-
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:http_parser/http_parser.dart';
 
 import 'body.dart';
 import 'shelf_unmodifiable_map.dart';
 import 'util.dart';
 
 Body getBody(Message message) => message._body;
@@ skipping 126 matching lines @@
   headers = new CaseInsensitiveMap.from(headers);
   if (headers['content-type'] == null) {
     return addHeader(headers, 'content-type',
         'application/octet-stream; charset=${encoding.name}');
   }
 
   var contentType = new MediaType.parse(headers['content-type']).change(
       parameters: {'charset': encoding.name});
   return addHeader(headers, 'content-type', contentType.toString());
 }