isolates refactor: this change introduces 'dart:isolate' as a library. This is a

tests/isolate/src/MintMakerTest.dart

 // Copyright (c) 2011, 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.
 
 // Things that should be "auto-generated" are between AUTO START and
 // AUTO END (or just AUTO if it's a single line).
 
+#library("MintMakerTest");
+#import("dart:isolate");
+
 
 class Mint {
   Mint() : registry_ = new Map<SendPort, Purse>() {
     // AUTO START
     ReceivePort mintPort = new ReceivePort();
     port = mintPort.toSendPort();
     serveMint(mintPort);
     // AUTO END
   }
 
@@ skipping 245 matching lines @@
     Expect.equals(0 + 5 + 42, sprouted.queryBalance());
     Expect.equals(100 - 5 - 42, purse.queryBalance());
   }
   */
 
 }
 
 main() {
   MintMakerTest.testMain();
 }