Get rid of all the library tags.

lib/src/static_handler.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 shelf_static.static_handler;
-
 import 'dart:io';
 
 import 'package:http_parser/http_parser.dart';
 import 'package:mime/mime.dart' as mime;
 import 'package:path/path.dart' as p;
 import 'package:shelf/shelf.dart';
 
 import 'directory_listing.dart';
 import 'util.dart';
 
@@ skipping 112 matching lines @@
   var filePath = p.join(dirPath, defaultFile);
 
   var file = new File(filePath);
 
   if (file.existsSync()) {
     return file;
   }
 
   return null;
 }