build config: use debian-installer-distribution sid (as in d5563e6)
packge lists: add live-build recommended packages, See live-manual, section 8.4.3. (as in d5563e6)
packge lists: remove gstreamer0.10-ffmpeg (unavailable)
package lists: remove lxappearance (replaced with xfce4-settings)
package lists: remove kiwix (missing dependencies)