[AD] Allegro 4.2.2 released

[Peter W. <nov...@gm...>]

The source packages are up.  The web page is not updated yet and binary
packages aren't built yet.  I assume most people read a.cc or have
otherwise seen the change log so I won't post it again.

Files at http://sourceforge.net/project/showfiles.php?group_id=5665

Change log at http://www.allegro.cc/forums/thread/592406

Peter