Move `provide' to the end. Update copyright.

Move `provide' to the end.  Update copyright.
(sgml-mode-map): Use `make-keymap' rather than make the keymap by hand.
Bind the latin-1 charset-char to sgml-maybe-name-self rather than
incorrectly binding chars between 128 and 256 to it.
(sgml-maybe-name-self): Handle latin-1 chars properly.
(sgml-tags-invisible): Bind buffer-file-name to nil.
Use unwind-protect and restore-buffer-modified-p.
(sgml-point-entered): Use buffer-substring-no-properties.
(html-tag-alist): Add `div' and `span' and fix backquote/unquote typos.
(html-mode): Don't force `imenu-sort-function'.