fix #619: replace update-translations.rb by update-translations.sh the original ruby script was 95% pure shell, and languages-codes.sh were also used in dump-po-files.sh
Display an error when server replies with 404
fix local language codes for portuguese(brasil) chinese(china/tawain)
Make dump-po-files.sh executable
Merge pull request #621 from wordpress-mobile/issue/619-pull-new-lang-with-update-translations.rb

fix #619 pull new lang with update translations.rb