Compile localizations

[robfig]

Hi @nicks , Is it possible to generate one artifact per locale, provided a list of locales? The near-term question is about using the date and number formatting functions pruned just to the locale that the bundle is for (otherwise the locale info maps are too big and we can't use goog.i18n). We have our translations in .po files so I guess there is no support for hooking that up to goog.getMsg, but we have our own system for that right now. Thanks, Rob