Merge the dart:uri library into dart:core and update the Uri class

tests/standalone/io/https_client_certificate_test.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.
 
 import "package:expect/expect.dart";
 import "dart:async";
 import "dart:io";
-import "dart:uri";
 import "dart:isolate";
 
 const HOST_NAME = "localhost";
 
 
 Function test() {
   var keepAlive = new ReceivePort();
   HttpServer.bindSecure(HOST_NAME,
                         0,
                         backlog: 5,
@@ skipping 29 matching lines @@
   var testPkcertDatabase =
       new Path(new Options().script).directoryPath.append('pkcert/');
   SecureSocket.initialize(database: testPkcertDatabase.toNativePath(),
                           password: 'dartdart');
 }
 
 void main() {
   InitializeSSL();
   test();
 }