(ada-case-exception-file, ada-indent-handle-comment-special): New variables.

(ada-case-exception-file, ada-indent-handle-comment-special): New variables.
(ada-case-exception-substring): New variable.  Casing exceptions can
now also be defined for substrings, in addition to full identifier
names.  This provides more flexibility.
(ada-align-list): New function, provide support for align.el in ada-mode.
(ada-procedure-start-regexp): Add support for operators and generic formal
subprograms and packages.
(ada-imenu-comment-re): New variable.
(ada-imenu-generic-expression): Add support for protected types.
(ada-mode): Set comment-start only after running ada-mode-hook, so that the
user can change ada-comment-start in the hook.
Add support for ispell in comments.  Add support for align.el.
(ada-save-exception-file, ada-create-case-exception-substring)
(ada-adjust-case-substring): New functions.
(ada-get-current-indent): Properly handles keywords with uppercases.
(ada-goto-matching-end): Rewritten, fixes problems in the handling of
nested blocks.
(ada-untab-hard): Do not touch the contents of comments and strings.