Karrigell-2.3 released

The main change in version 2.3 is that buzhug (http://buzhug.sourceforge.net) becomes the default database engine instead of KirbyBase. I rewrote all the demos with it ; the forum demo has been improved, with the ability to remove messages and a nicer look

The other important change is the replacement of gettext by a much simpler module (called k_translation) ; I wrote it because I still had problems with unicode and wasn't able to solve them with gettext and its .po and .mo files. The interface is the same (use of the _() function, or <%_ %> in PIH scripts) but the translations themselves will have to be entered again using the script admin/internat.pih