Hierarchy: delete the temp

Hierarchy: inline next_bottle_number

Hierarchy: call successor instead of the factory

Hierarchy: delete hack in factory

Hierarchy: handle both object and number in factory

Hierarchy: move factory into bottle number class

add to_s to case 0

Hierarchy: move capitalize out of the interpolation

Hierarchy: fix capitalized dataclump the awkward way

Hierarchy: fix another easy data clump