Sortie de Agar-1.4.1

Il me fait plaisir d'annoncer la sortie de Agar 1.4.1. Le code source
et quelques paquets binaires précompilés sont disponibles sur:

	http://libagar.org/download.html.fr

Cette sortie marque la fin de vie pour la branche 1.3. L'assistance
ne sera plus disponible pour les versions 1.3.x d'Agar.

Release Notes for Agar 1.4.1
----------------------------

Here are some of the most notable changes since Agar 1.4.0, in no
particular order. A wikified version of this list is available at:
http://wiki.libagar.org/wiki/Agar-1.4.1.

- Port to Xbox (thanks Michael J. Wood!).
- Widget code can now use the AG_Redraw() and AG_RedrawOn*() interfaces to
  trigger rendering. The generic event loop uses this information to avoid
  unnecessary video updates -- custom event loops should be modified to
  test for the window "dirty" flag to take advantage of this feature.
- Fixed compilation with --disable-legacy option.
- Implemented AG_SurfaceFromPNG() and AG_SurfaceFromJPEG().
- Fixed crash bug in AG_SurfaceFromSDL(); thanks trapdoor!
- Added AG_SetJPEGQuality(), to set quality used by AG_SurfaceExportJPEG().
- Merge --enable-{class,event}debug into --enable-objdebug; remove lockdebug.
- Upgrade build system to BSDBuild 2.8. Note that stale ./agar-config/ and
  ./agar-foo-config/ directories may break the build and should be removed
  before ./configure is executed.
- Fix deadlock condition with the AG_Timeout interface when timers are