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

tools/create_sdk.py

 #!/usr/bin/env python
 #
 # 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.
 #
 # A script which will be invoked from gyp to create an SDK. 
 #
 # Usage: create_sdk.py sdk_directory
 #
@@ skipping 10 matching lines @@
 # ........builtin_runtime.dart
 # ......io/
 # ........io_runtime.dart
 # ........runtime/
 # ......core/
 # ........core_{frog, runtime}.dart
 # ........{frog, runtime}/ 
 # ......coreimpl/
 # ........coreimpl_{frog, runtime}.dart
 # ........{frog, runtime}/ 
+# ......isolate/
+# ........isolate_{frog, runtime}.dart
+# ........{frog, runtime}/ 
 # ......dom/
 # ........dom.dart
 # ......frog/
 # ......html/ 
 # ........html.dart
 # ......htmlimpl/ 
 # ........htmlimpl.dart
 # ......json/
 # ........json_frog.dart
 #.........json.dart
@@ skipping 222 matching lines @@
   #
 
   for library in ['json', 'uri', 'utf8']:
     src_dir = join(HOME, 'lib', library)
     dest_dir = join(LIB, library)
     os.makedirs(dest_dir)
 
     for filename in os.listdir(src_dir):
       if filename.endswith('.dart'):
         copyfile(join(src_dir, filename), join(dest_dir, filename))
+  
+  # Create and populate lib/isolate
+  copytree(join(HOME, 'lib', 'isolate'), join(LIB, 'isolate'),
+           ignore=ignore_patterns('.svn'))
 
   #
   # Create and populate lib/core.
   #
 
   # First, copy corelib/* to lib/{frog, runtime}
   for filename in corelib_sources:
     for target_dir in ['frog', 'runtime']:
       copyfile(join('corelib', 'src', filename), 
                join(corelib_dest_dir, target_dir, filename))
@@ skipping 75 matching lines @@
 
   # Create and copy tools.
 
   UTIL = join(SDK_tmp, 'util')
   os.makedirs(UTIL)
 
   move(SDK_tmp, SDK)
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))