Rationale:
* Header cleanup: make the header of localedata files consistent
* Add (week): add the missing definition of week and first_weekday to 2
* Change (thousands_sep): change the thousands_sep from <U002C> to
<U2009> to avoid confusion of grouping 4 with usual grouping 3
* Extend alt_digits: from 0..59 to 0..99 for lzh_TW
* Add collation: add missing collation used in cmn_TW
* New locale: create yue_TW

Changelog:
* localedata/locales/cmn_TW: Header cleanup; Add (week); Change (thousands_sep).
* localedata/locales/hak_TW: Likewise and add collation.
* localedata/locales/lzh_TW: Likewise and extend alt_digits, add collation.
* localedata/locales/nan_TW: Likewise and add collation.
* localedata/locales/yue_TW: New locale.