Rename vagrant packages task, and explicitly install dhclient
Add minimal LVM partitioner

You can now specify that you want a basic LVM-using setup (512MB ext3 /boot, 2GB
root LV, rest of the disk empty VG) by using `--plugin
partitioner/lvm-minimal`.  This will, of course, only work for targets that
actually use a disk image; Bad Shit will likely occur otherwise.  So don't
do that.
Clear out the apt lists

Save a good few MB of space.
Make eatmydata invocation actually work