(tmm-add-one-shortcut): New subroutine.

(tmm-add-one-shortcut): New subroutine.
(tmm-add-shortcuts): Code moved to tmm-add-one-shortcut.
Handle tmm-shortcut-style and tmm-shortcut-words.
(tmm-define-keys): Use suppress-keymap.
Moved use-local-map from the caller here.
tmm-short-cuts is now a list of chars, not of one-char strings.
(tmm-completion-delete-prompt): New function, used in
completion-setup-hook.
(tmm-shortcut-style): New variable.
(tmm-shortcut-words): New variable.
(tmm-shortcut): Handle tmm-shortcut-style.
The shortcut searched in tmm-short-cuts is now a char, not a string.