Reformat and update copyright years.

Reformat and update copyright years.
(fortran-if-indent): Doc fix.
(fortran-font-lock-keywords-2): Add "where", "elsewhere".
(fortran-font-lock-keywords-4): New variable.
(fortran-blocks-re, fortran-end-block-re)
(fortran-start-block-re): New constants, for hideshow.
(hs-special-modes-alist): Add a Fortran entry.
(fortran-mode-map): Bind fortran-end-of-block,
fortran-beginning-of-block to \M-\C-n, \M-\C-p.
(fortran-mode): Doc fix. Add fortran-font-lock-keywords-4.
(fortran-looking-at-if-then, fortran-end-of-block)
(fortran-beginning-of-block): New functions, for hideshow.