Use regexp-opt and eval-and-compile to

Use regexp-opt and eval-and-compile to
build font-lock patterns.
(fortran-mode): Define indent-region-function,
indent-line-function.
(fortran-tab-mode-string): Make buffer-local.
(fortran-comment-indent-style): Custom tweak.
(fortran-comment-region, fortran-electric-line-number,
fortran-analyze-depth, fortran-break-before-delimiters,
fortran-mode): Doc fix.
(fortran-startup-message, bug-fortran-mode): Variables
deleted.
(fortran-font-lock-keywords-1): Add "select", "case"; allow
double-quoted strings.
(fortran-mode-map): Add fill-paragraph menu item.  Don't
define \t.
(fortran-mode): Make `fill-column' buffer-local; set
`fill-paragraph-function', `indent-region-function',
`indent-line-function'.
(calculate-fortran-indent): Renamed to:
(fortran-calculate-indent):
(fortran-split-line): Simplify.
(fortran-remove-continuation): New function.
(fortran-join-line): Use it.
(fortran-end-prog-re1, fortran-end-prog-re): New variables.
(beginning-of-fortran-subprogram, end-of-fortran-subprogram):
Use them.
(fortran-blink-matching-if, fortran-blink-matching-do,
fortran-indent-new-line): Bind case-fold-search.
(fortran-end-do, fortran-beginning-do, fortran-end-if,
fortran-beginning-if): Bind case-fold-search.  Allow labelled
blocks.  Use fortran-end-prog-re.
(fortran-if-start-re): New variable.
(fortran-calculate-indent): Allow labelled blocks.  Simplify the
conds.  Make select case indentation work.
(fortran-is-in-string-p): Ignore Emacs 18 bug kluge.
(fortran-fill): Allow double quotes in check for string.
(fortran-fill-paragraph): New function.
(fortran-fill-statement): New function.