Update project authors statements to Dartino

pkg/immi_samples/lib/sliding_window.immi

-// 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.
 
 // Reusable sliding-window view of a list of nodes.  The window is represented
 // as a cyclic buffer so that sliding by N, where N is less than the buffer
 // length, can be implemented as shifting the buffer offset by N and populating
 // N items.
 node SlidingWindow {
   // Cyclic buffer for the sliding window of nodes.
   List<Node> window;
 
   // Offset of the window start from the original list.
   int32 startOffset;
 
   // Offset of the first sliding-window item in the window.
   uint16 windowOffset;
 
   // Number of items known to be in the list.
   int32 minimumCount;
 
   // Number of items in the list. A negative value denotes an unknown size.
   int32 maximumCount;
 
   // Event to update the sliding-window display range.
   void display(int32 start, int32 end);
 
   // Event to toggle an item in the window.
   void toggle(int32 index);
 }