Update project authors statements to Dartino

src/vm/hash_set.h

-// 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.
 
 #ifndef SRC_VM_HASH_SET_H_
 #define SRC_VM_HASH_SET_H_
 
 #include "src/vm/hash_table.h"
 
 namespace fletch {
 
@@ skipping 14 matching lines @@
 // * Not all methods are implemented.
 // * Iterators are invalidated on all inserts, even if the key was already
 //   present.
 // * Google naming conventions are used (CamelCase classes and methods).
 template <typename Key>
 class HashSet : public UnorderedHashTable<Key, Key, SetKeyExtractor<Key>> {};
 
 }  // namespace fletch
 
 #endif  // SRC_VM_HASH_SET_H_