No longer a minor mode.

No longer a minor mode.
(expand-submit-bug-report): Function deleted.
(expand-mode-version, expand-mode-help-address): Variables deleted.
(expand-mode): Variable and function deleted.
(expand-mode-hook, expand-mode-name): Variables deleted.
(expand-load-hook): Variable renamed from expand-mode-load-hook.
(expand-map): Variable deleted.
(expand-jump-to-next-slot): Renamed from expand-jump-to-next-mark.
Add autoload.
(expand-jump-to-previous-slot): Add autoload.
Renamed from expand-jump-to-previous-mark.