feat(disk_util): Replace Resize() with Update()

The new Update() performs the same tasks as the old Resize()
in addition to formatting previously-unformatted partitions. This
allows children disk-layouts to repartition the base layout in
addition to resizing.
feat(teeth): Add new OEM and disk layout for teeth
Merge pull request #263 from crawford/teeth

feat(teeth): Add new OEM and disk layout for teeth