* wl-vars.el (wl-summary-unread-mark, wl-summary-important-mark,

* wl-vars.el (wl-summary-unread-mark, wl-summary-important-mark,
wl-summary-new-mark, wl-summary-unread-uncached-mark,
wl-summary-unread-cached-mark, wl-summary-read-uncached-mark):
Renamed to the elmo-msgdb-*-mark.
(wl-summary-score-marks): Follow the change above.
(wl-summary-auto-refile-skip-marks): Ditto.
(wl-summary-incorporate-marks): Ditto.
(wl-summary-expire-reserve-marks): Ditto.

* wl-thread.el (wl-thread-open-all-unread): Follow the variable name
changes.
(wl-thread-insert-top): Changed updating message.

* wl-summary.el (wl-summary-buffer-answered-count): New buffer local variable.
(wl-summary-count-unread): Count answered marks.
(wl-summary-rescan): Call wl-summary-insert-message instead of
wl-summary-append-message-func-internal.
(wl-summary-rescan): Don't call wl-summary-make-number-list.
(wl-summary-prefetch-msg): Follow the variable name changes.
(wl-summary-prefetch-region): Ditto.
(wl-summary-mark-as-read-all): Follow the API changes;
Don't call elmo-folder-replace-marks.
(wl-summary-delete-cache): Follow the variable name changes.
(wl-summary-resume-cache-status): Ditto.
(wl-summary-update-status-marks): New function.
(wl-summary-insert-message): New function.
(wl-summary-sync-marks): Follow the variable name changes.
(wl-summary-sync-update): Synchronize to the msgdb, too;
Changed update messages.
(wl-summary-make-number-list): Rewrite.
(wl-summary-insert-sequential): Update wl-summary-buffer-number-list.
(wl-summary-mark-as-unread): Follow the API changes.
(wl-summary-exec-subr): Follow the variable name changes.
(wl-summary-mark-as-read): Ditto.
(wl-summary-move-spec-plugged-alist): Ditto.
(wl-summary-move-spec-unplugged-alist): Ditto.
(wl-summary-cursor-move-surface): Ditto.

* wl-highlight.el (wl-highlight-summary-line-string): Follow the
variable name changes.
(wl-highlight-summary-current-line): Ditto.

* wl-expire.el (wl-expire-refile): Follow the API change in
elmo-folder-move-messages.
(wl-expire-refile-with-copy-reserve-msg): Ditto.
(wl-summary-archive): Use elmo-folder-msgdb instead of
elmo-msgdb-load.