Rename fletch -> dartino

pkg/async_helper/fletch.patch

-diff --git a/../dart/pkg/async_helper/lib/async_helper.dart b/pkg/async_helper/lib/async_helper.dart
-index 37496bc..1b8acf4 100644
---- a/../dart/pkg/async_helper/lib/async_helper.dart
-+++ b/pkg/async_helper/lib/async_helper.dart
-@@ -27,16 +27,22 @@ library async_helper;
- // 'dart:isolate' (i.e. it is in particular problematic with dart2js).
- // It would be nice if we could use a different mechanism for different
- // runtimes.
--import 'dart:isolate';
-+import 'dart:fletch';
- 
- bool _initialized = false;
--ReceivePort _port = null;
-+Port _port = null;
- int _asyncLevel = 0;
- 
- Exception _buildException(String msg) {
-   return new Exception('Fatal: $msg. This is most likely a bug in your test.');
- }
- 
-+void _waitForMessage(Port port) {
-+  Channel channel = new Channel();
-+  port.send(new Port(channel));
-+  channel.receive();
-+}
-+
- /// Call this method before an asynchronous test is created.
- void asyncStart() {
-   if (_initialized && _asyncLevel == 0) {
-@@ -46,7 +52,9 @@ void asyncStart() {
-   if (!_initialized) {
-     print('unittest-suite-wait-for-done');
-     _initialized = true;
--    _port = new ReceivePort();
-+    var channel = new Channel();
-+    Process.spawn(_waitForMessage, new Port(channel));
-+    _port = channel.receive();
-   }
-   _asyncLevel++;
- }
-@@ -63,7 +71,7 @@ void asyncEnd() {
-   }
-   _asyncLevel--;
-   if (_asyncLevel == 0) {
--    _port.close();
-+    _port.send(null);
-     _port = null;
-     print('unittest-suite-success');
-   }