pkg/http_server: move to multi-lib layout

pkg/http_server/lib/http_server.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.
 
 /**
  * A library for serving HTTP requests and resources.
  *
  * ## Installing ##
  *
  * Use [pub][] to install this package. Add the following to your
  * `pubspec.yaml` file.
  *
  *     dependencies:
  *       http_server: any
  *
  * Then run `pub install`.
  *
  * For more information, see the
  * [http_server package on pub.dartlang.org][pub].
  *
  * ## Basic usage
  *
  * Here is a short example of how to serve all files from the current
  * directory.
  *
  *      import 'dart:io';
  *      import 'dart:async';
  *      import 'package:http_server/http_server.dart';
- * 
+ *
  *      void main() {
  *        var staticFiles = new VirtualDirectory('.')
  *          ..allowDirectoryListing = true;
- * 
+ *
  *        runZoned(() {
  *          HttpServer.bind('0.0.0.0', 7777).then((server) {
  *            print('Server running');
  *            server.listen(staticFiles.serveRequest);
  *          });
  *        },
  *        onError: (e, stackTrace) => print('Oh noes! $e $stackTrace'));
  *     }
  *
  * ## Virtual directory
- * 
+ *
  * The [VirtualDirectory] class makes it easy to serve static content
  * from the file system. It supports:
- * 
+ *
  *  *  Range-based requests.
  *  *  If-Modified-Since based caching.
  *  *  Automatic GZip-compression of content.
  *  *  Following symlinks, either throughout the system or inside
  *     a jailed root.
  *  *  Directory listing.
- * 
+ *
  * See [VirtualDirectory] for more information.
- * 
+ *
  * ## Virtual host
- * 
+ *
  * The [VirtualHost] class helps to serve multiple hosts on the same
  * address, by using the `Host` field of the incoming requests. It also
  * works with wildcards for sub-domains.
- * 
+ *
  *     var virtualHost = new VirtualHost(server);
  *     // Filter out on a specific host
  *     var stream1 = virtualServer.addHost('static.myserver.com');
  *     // Wildcard for any other sub-domains.
  *     var stream2 = virtualServer.addHost('*.myserver.com');
  *     // Requets not matching any hosts.
  *     var stream3 = virtualServer.unhandled;
- * 
+ *
  * See [VirtualHost] for more information.
  *
  * [pub]: http://pub.dartlang.org/packages/http_server
  */
 library http_server;
 
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:mime/mime.dart';
-import "package:path/path.dart";
-
-part 'src/http_body.dart';
-part 'src/http_body_impl.dart';
-part 'src/http_multipart_form_data.dart';
-part 'src/http_multipart_form_data_impl.dart';
-part 'src/virtual_directory.dart';
-part 'src/virtual_host.dart';
-
+export 'src/http_body.dart';
+export 'src/http_multipart_form_data.dart';
+export 'src/virtual_directory.dart';
+export 'src/virtual_host.dart';