1.21.2 (unstable):

* Field choices:
  - Allow custom (not related) choices to be translated,
  with only the original text being stored in the database.
  This only happens when the choices are restricted, at least for now.
  - Use the appropriate type of data for choices. rather than, for instance,
  forcing German users to see (and store) 1.99 EUR instead of 1,99 EUR.
* Translations:
  - Offer non-country locales, such as de, instead of only de_DE, de_AT, etc.
  - Default to the first locale in the list, instead of none.
* Added command-line utilities to help with translation via po files:
  glom_export_po, glom_import_po, glom_export_po_all.
* Build: Added several more tests, including tests of the translation system
  and of the iso-codes XML files parsing.