Unstable branch

I've created a new branch of Bygfoot called -- how unusual -- 'unstable'. Here are the notes for the first unstable file release:

This version is meant for those who already know Bygfoot and are
curious about the changes the new offical version will contain that
are already implemented.

Because of this intended audience I haven't included any installation
instructions; those who can't figure out how to install / use this
version please refer to one of the official releases.

The ChangeLog file contains an overview of the changes already
implemented, the TODO file contains some plans concerning future
changes (however, not only those that'll be part of the next official
release).

And don't forget that by installing / using this version of Bygfoot,
you automatically accept the agreement the details of which you can
find in the 100000-lines LICENCE file :-))); to make it short, you're
obliged to report bugs to my above e-mail address. You'll help make
the next official release more stable than the unstable release :-)