Checked in at last a lot of improvementes and bug fixes. The oldest dating

Checked in at last a lot of improvementes and bug fixes.  The oldest dating
back to 1997-06-04.  Please look at Changelog for details.  Main changes
are:

- lots of code cleanups and optimizations
- --globals is used not only for C-like languages
- new option --ignore-case-regex
- understands "operator" in C++
- support DOS file names by handling e.g. foo.cgz as if it were foo.c.gz.
- Fortran: no tags for "procedure"
- new option --declarations
- regular expressions can be read from a file
- regular expressions can be bound to a given language
- Ada and Python languages added
- my and local variables recognised in Perl
- "(defstruct (foo", "(defun (operator" and similar Lisp constructs
- interface in Java