Hopefully fix some of the more glaring problems

 Apparently --apt-recommends=false is a fairly dangerous option to pass
 lb config. While it removes quite a bit of unneded (to us) garbage
 (like a full X11 environment dragged in, ultimately, by virtualbox
 guest additons), apparently some more important things are dragged in
 by recommends, like the tools live-config uses to generate the user
 at runtime... I've looked through a diff between packages installed in
 a build with recommends enabled and one with recommends disabled, and
 added some important things like user-setup explicitly to package lists.