Update project authors statements to Dartino

tests/debugger/is_check_test.dart

-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// 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.
 
 class A {
   final int a = 42;
 }
 
 class B extends A {
   final int b = 32;
 }
@@ skipping 11 matching lines @@
 main() {
   var a = new A();
   var b = new B();
   if (a is A) a.a;
   if (a is B) a.b;
   if (b is A) b.a;
   if (b is B) b.b;
   var c = new C(a, b);
   if (isB) globalA.a;
 }