Lucid menu added.

Lucid menu added.
(ispell): New function.
(ispell-region): Assure choices and checked buffer selections correct.
reindented.
(ispell-highlight-spelling-errors): Prefix ispell- to highlght fns.
(ispell-complete-word): Heuristic to respect case of completed words.
(ispell-command-loop): Non-character events ignored.  Reindented.
(ispell-message): Various improvements.
(ispell-init-process): `ispell-extra-args' added to allow personal
customizations.