Update project authors statements to Dartino

lib/core/string.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.
 
 part of dart.core_patch;
 
 class StringMatch implements Match {
   final int start;
   final String input;
   final String pattern;
 
@@ skipping 516 matching lines @@
     switch (fletch.nativeError) {
       case fletch.wrongArgumentType:
         throw new ArgumentError();
       case fletch.indexOutOfBounds:
         throw new IndexError(index, this);
     }
   }
 
   @fletch.native external static _TwoByteString _create(int length);
 }