Update project authors statements to Dartino

src/vm/hash_map.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_MAP_H_
 #define SRC_VM_HASH_MAP_H_
 
 #include "src/vm/hash_table.h"
 
 namespace fletch {
 
@@ skipping 33 matching lines @@
     char* mapped = this->map_.At(reinterpret_cast<const void*>(key));
     // The original API throws an exception, but we don't use exceptions.
     ASSERT(mapped != NULL);
     return *reinterpret_cast<MappedType*>(mapped);
   }
 };
 
 }  // namespace fletch
 
 #endif  // SRC_VM_HASH_MAP_H_