Replace conditional (require 'ispell) with defvar.
(ada-language-version): Rename ada05 ->
ada2005.
(ada-83-string-keywords, ada-95-string-keywords, ada-2005-string-keywords):
Delete unneeded `eval-when-compile'.
(ada-align-region-separate): Add `eval-when-compile'.
(ada-name-regexp): Remove unneeded escapes in regexp character alternative.
(ada-compile-goto-error-file-linenr-re): New constant.
(ada-matching-start-re): Handle additional cases `declare', `procedure',
`function'.
(ada-compile-goto-error): Handle "... at line nn".
(ada-mode): Clearer syntax, comments for ff-special-constructs.
Delete support for old versions of `align'.
(ada-search-prev-end-stmt): Handle additional keyword `private'.
(ada-check-defun-name): Simplify handling of `declare'.
(ada-goto-matching-start): Handle nested `begin ... end'. Handle `declare',
`protected', `procedure', `function'.
(ada-create-menu): Presence of arm95 is not conditional on using GNAT compiler.