Add list formatting for Chinese (zh)
Add list formatting for Russian (ru)

(Also refactored the spec a little.)
Add list formatting for Bulgarian (bg)
Add list formatting for English (en)
Add list formatting for Polish (pl)

(Also refactored the spec a little.)
Add list formatting for Italian (it)
Add list formatting for Slovak (sk)

(Also refactored the spec a little.)
Fix class identification in spec for R18n::Locales::Th
Add list formatting for Thai (th)
Add list formatting for Catalan (ca)
Add list formatting for Danish (da)
Add list formatting for German (de)
Add list formatting for Spanish (es)
Add list formatting for Finnish (fi)
Add list formatting for Galician (gl)
Add list formatting for Croatian (hr)
Add list formatting for Indonesian (id)
Add spec for list formatting in Kazakh (kh)

It uses the generic "A, B, C" style because CLDR doesn't define anything
more specific.
Add list formatting for Latvian (lv)
Add list formatting for Norwegian Bokmål (nb)