Update project authors statements to Dartino

tools/capnp/tests/address_book.capnp

-# Copyright (c) 2014, the Fletch project authors. Please see the AUTHORS file
+# Copyright (c) 2014, 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.
 
 # Compile using:
 #
 #   $ capnp compile -o ./capnp-dart.sh tests/address_book.capnp
 #
 
 @0x9cd01bb825c20e08;
 
@@ skipping 19 matching lines @@
     employer @5 :Text;
     school @6 :Text;
     selfEmployed @7 :Void;
     # We assume that a person is only one of these.
   }
 }
 
 struct AddressBook {
   people @0 :List(Person);
 }