- (hilit-rehighlight-region): added (save-restriction (widen))

- (hilit-rehighlight-region): added (save-restriction (widen))
  to avoid hangups in dired.
- Also slight improvements to fortran patterns and
  hilit-default-face-table doc string
- added optional case-fold argument to hilit-set-mode-patterns
- added hilit-rehighlight-buffer-quietly to dired-after-readin-hook
- fixed bug in hilit-string-find that mishandled some strings: "\\"
- work-around for bug in next-overlay-change
- the pattern matcher now starts it's searches from the end of the
  most recently highlighted region (which is not necessarily the end
  of the most recently matched regex).
- code moved from hilit-highlight-region to hilit-set-mode-patterns.
  This will affect you if you pass your patterns directly to
  hilit-highlight-region....use a pseudo-mode instead.
- twiddled C/C++, latex, texinfo, fortran, nroff patterns.
- added calendar-mode, icon-mode and pascal-mode patterns
- diverged lisp-mode and emacs-lisp-mode...also added lisp keywords.