Don't define-widget-keywords.

Don't define-widget-keywords.
(multimedia): New group.
(custom-last): Function removed.
(custom-quote): Add vectorp case, comment out characterp case.
(custom-buffer-done-function, custom-raised-buttons): New option.
(Custom-buffer-done): New function.
(custom-buffer-create-internal): Obey custom-raised-buttons,
Custom-buffer-done.
(custom-button-face): Make it `released-button'.
(custom-button-pressed-face): Make it `pressed-button'
(custom-mode-map): Bind "q" to Custom-buffer-done.
(custom-mode): Deal with raised/pressed buttons.

Changes from Didier Verna:
(custom-prompt-variable): Optional third arg makes prompt for a comment
string.
(customize-set-value, customize-set-variable, customize-save-variable):
Optional prefix makes function handle variable comments.
(customize-customized, customize-saved, custom-variable-state-set)
(custom-variable-set, custom-variable-save, custom-face-state-set)
(custom-variable-reset-saved, custom-variable-reset-standard)
(custom-face-set, custom-face-save, custom-face-reset-saved)
(custom-face-reset-standard, customize-save-customized): Handle custom
comments.
(custom-comment-face, custom-comment-tag-face): New face.
(custom-comment): New widget.
(custom-comment-create, custom-comment-delete)
(custom-comment-value-set, custom-comment-show)
()custom-comment-invisible-p): New functions.
(custom-variable-value-create, custom-face-value-create): Create a
comment field widget.
(custom-variable-menu, custom-face-menu): New entry for custom comment.
(custom-face-value-create): Remove compatibility code.
(custom-save-variables, custom-save-faces): Possibly save custom comments.