(map:escape): Don't shift. Don't include "[".

(map:escape): Don't shift.  Don't include "[".
(map:non-tibetan): New map.
(map:unicode): Don't shift.
(state:init): Add `shift' to the branch action of `escape'.
Include `non-tibetan' map.
(state:dispatch-escape): Add `shift' to the branch action of
`unicode'.