Update maintainer.

Update maintainer.
(f90-startup-message): Obsolete variable removed.
(f90-font-lock-keywords-1): Move "module procedure" to front, remove
override. Fix highlighting of various "type" forms.
(f90-font-lock-keywords-2): Add override flag so declarations of variables
with derived types work.
(f90-font-lock-keywords-3): Use `keep' rather than `override' so as not to
fontify in comments.
(f90-line-continued): Recognize blank/comment lines embedded in
continuation lines.
(f90-looking-at-program-block-start): No extra indentation after function
or subroutine keyword appears in single quotes.
(f90-indent-new-line): Make it indent the current line, as it should.
(f90-indent-region): Correctly indent comments embedded in continued lines.