(quail-mode): This variable deleted.

(quail-mode): This variable deleted.
(quail-current-key): Make it buffer local.
(quail-current-str, quail-current-translations): Likewise.
(quail-reset-conversion-region): This variable deleted.
(quail-use-package): Call quail-activate at the tail.
(quail-translation-keymap, quail-simple-translation-keymap): Key
bindings for quail-execute-non-quail-command deleted.
(quail-conversion-keymap): Likewise.  Add key bindings for
quail-self-insert-command.
(quail-delete-overlays): Chekc overlay-start for overlays before
deleting them.
(quail-mode): This function deleted.
(quail-inactivate, quail-activate): New functions.
(quail-saved-current-map, quail-saved-current-buffer): These
variables deleted.
(quail-toggle-mode-temporarily, quail-execute-non-quail-command):
These functions deleted.
(quail-exit-conversion-mode, quail-prefix-arg): These variables
deleted.
(quail-error): New error condition.
(quail-error): New function.
(quail-translating, quail-converting): New variables.
(quail-input-method, quail-overlay-region-events): New function.
(quail-start-translation): Completely re-written.
(quail-start-translation-in-conversion-mode): This function
deleted.
(quail-start-conversion): New function.
(quail-terminate-translation): Just set quail-translating to nil.
(quail-update-translation): Put some events back to
unread-input-method-events instead of unread-command-events.  Call
quail-error instead of error.
(quail-self-insert-command): Adjusted for the change of
quail-start-translation.
(quail-next-translation): Don't call
quail-execute-non-quail-command, instead, put an event back of
unread-command-events.
(quail-prev-translation, quail-next-translation-block,
quail-prev-translation-block): Likewize.
(quail-conversion-backward-char): Call quail-error instead of
error.  Set quail-translating to nil.
(quail-conversion-forward-char): Likewize.
(quail-conversion-delete-char): Call quail-error instead of error.
If conversion region gets vacant, set quail-converting to nil.
(quail-conversion-backward-delete-char): Likewize.
(quail-no-conversion): Just set quail-converting to nil.
(quail-mouse-choose-completion): Call quai-error instead of error.
(quail-choose-completion-string): Likewize.
(quail-help): Don't handle quail-mode-map.