feat(tw): init tw with administrative division select

[mattwang44]

• Add new flavor for Taiwan (tw)
• Add TWAdministrativeDivisionSelect

All Changes

• Add an entry to the docs/changelog.rst describing the change.

• Add an entry for your name in the docs/authors.rst file if it's not
  already there.

New Fields Only

• Prefix the country code to all fields.

• Field names should be easily understood by developers from the target
  localflavor country. This means that English translations are usually
  not the best name unless it's for something standard like postal code,
  tax / VAT ID etc.

• Prefer 'PostalCodeField' for postal codes as it's
  international English; ZipCode is a term specific to the United
  States postal system.

• Add meaningful tests. 100% test coverage is not required but all
  validation edge cases should be covered.

• Add .. versionadded:: <next-version> comment markers to new
  localflavors.

• Add documentation for all fields.

[benkonrath]

Thanks for the PR! I'll have a look at it next week sometime.

[benkonrath]

Sorry for the delay. The names need to be updated as indicated before this can be merged.

[benkonrath]

The displayed text should be in English and marked as translatable with gettext. We use Transifex to manage the translations - the translated version can be added to Transifix after this PR is merged. The translations are then pulled into the repo before a release, or as needed.

You can see an example of how to do this in the KW local flavor:

https://github.com/django/django-localflavor/blob/master/localflavor/kw/kw_areas.py

I realize this is a roundabout way of getting the administrative names displayed, but this is how we allow developers to create multi-lingual applications.

[mattwang44]

fixed, please review again.
how can i help with the translation on the Transifex? I found the link. I'll join the project to add these translation strings.

[benkonrath]

Thanks for PR and for your quick update!