Preview of forthcoming gnubg release

[Philippe Michel]

I have uploaded a new gnubg Windows build at 
http://philippe.michel7.free.fr/gnubg/

If not for a report of a serious issue I will use this version for a 
release next week.

The corresponding sources (with a few minor changes not yet commited
to the cvs repository) and the translations' .po files are available
there as well.

Besides bug fixes, there are four significant changes since the 1.06
version

- the 3D graphics have been largely rewritted by Jon Kinsey. Although
  there are few visible changes at this time, this should provide the
  foundation for improvements and allow to use 3D with more recent
  versions of GTK.

- the "score map" feature contributed by Aaron Tikuisis and Isaac
  Keslassy is included.

- the Python interface uses python3 in the above Windows build. It is
  still possible build gnubg with python2 but it is likely that the
  various Linux distribution providing gnubg will use python3 as well.

- the user interface translation is much more comprehensive that it
  used to be. UTF-8 encoding is used for all of them.