Create a modest partition 4 (1G) since we need some space for local FSes.
Rename many of the LVM routines to follow a common naming scheme.
Make extra effort to remove partitions on an LV; something about a FreeBSD
    VM makes kpartx forget one of its partitions.
Handle deltas on whole-disk images; some code was missing for this case.
Make sure multi-image case works; the golden images was being named
    incorrectly.
Make sure extra FS case works; for the golden image case we were using
    the golden image and ignoring what was specified for the extra FS.