new background export and compilation feature.
As far as new features is considered it is now possible to set the
-table width and customize or disable the language package per document.
+table width, customize the language package per document and
+export LyX files as a single archive containing linked material
+(e.g. images) directly via export menu.
+
Since this is most probably the last beta release we also added
convertor for old (1.6) preference files which are automatically
checked on the startup now.