Funiter 2.4.0 released.

This release adds new features to the 2.3.x branch and fixes a number of bugs (including the bugs fixed in 2.3.5). See: https://sourceforge.net/projects/funiter/files/funiter-beta/2.4.0/CHANGES/view for more information, and http://www.funiter.org/Funiter/Notes/README.240 for changes in the language files (compared to dutch.mnu).