Category Descriptions plugin for Seditio.

Installation:
1. Run "catdesc.sql" to apply changes on database.
2. Put "catdesc" into your plugin folder.
3. Go to "Admin => Plugins => Category descriptions" and install the plugin.
4. Add {LIST_TEXT} and {LIST_TEXTEDIT} tags to your "list.tpl" and "list.group.tpl".