Core: message beeps in POSIX (using play and gnome theme)

git-svn-id: http://upp-mirror.googlecode.com/svn/trunk@7981 05275033-79c2-2956-22f4-0a99e774df92
Core: Linux beeps made independent of desktop

git-svn-id: http://upp-mirror.googlecode.com/svn/trunk@7982 05275033-79c2-2956-22f4-0a99e774df92