puzzles: enable all the remaining games

They all work now :). I merged in part of Chris Boyle's Android port of
Puzzles to give the front end a way to know what keys the back end needs.
This also re-syncs to the latest upstream sources.

Change-Id: Ie0409bbb32f617ae5abf4f81be3b45d1552db9bb

apps/plugins/puzzles/src/palisade.c

@@ -1390,6 +1390,7 @@ const struct game thegame = {
     free_ui,
     encode_ui,
     decode_ui,
+    NULL, /* game_request_keys */
     game_changed_state,
     interpret_move,
     execute_move,