(quail-current-data): New variable.
(quail-use-package): Do not reload a package already loaded.
(quail-define-package): Update TITLE field of input-method-alist.
(quail-map-p): TRANSLATION may be a cons.
(quail-define-rules): Add autoload cookie.
(quail-defrule): Add autoload cookie. Handle the case that TRANS
is a cons.
(quail-get-translation, quail-lookup-key, quail-translate-key,
quail-show-translations, quail-completion-list-translations,
quail-show-kbd-layout): Likewise.
(quail-hide-guidance-buf): Check if window WIN exists before
deleting it.
(quail-directory-name): New variable.
(quail-update-leim-list-file): New function.