Rename fletch -> dartino

tests/debugger/uncaught_exceptions_test.dart

 // Copyright (c) 2015, the Dartino 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.md file.
 
-// FletchDebuggerCommands=r,restart,restart,restart,restart,restart
+// DartinoDebuggerCommands=r,restart,restart,restart,restart,restart
 
 enum State {
   ThrowNumber,
   ThrowString,
   ThrowExceptionObject,
   ThrowCustomObject,
   AccessNoSuchMethod,
   Done,
 }
 
@@ skipping 35 matching lines @@
 class CustomException {
   final String message;
   final int code;
 
   const CustomException(this.message, this.code);
 }
 
 class MyObject {
   foo() => print('foo');
 }