Update project authors statements to Dartino

tests/debugger/step_over_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.
 
 // FletchDebuggerCommands=b,r,n,n,n,s,n,s,n,b y,s,n,finish,q
 
 class A {
   final int _x, _y;
   A() : _x = 1, _y = 2;
   int get x => _x;
   int y() => _y;
 }
 
 int foo() => 2 + 3;
 
 main() {
   foo();
   foo();
   var a = new A();
   a.x;
   a.y();
   a.y();
   1;
 }