feat(i18n): generates test for comparing locale data of Angular and node-cldr

[evankroske]

Compares the plural rules included in Angular with those generated by node-cldr. Generates a web
page that counts the number of discrepencies between Angular and node-cldr's implementations of
plural rules.

[mary-poppins]

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[Narretz]

I don't think that script will be very useful, as we are always using the closure data, which is based on specific cldr releases. So we will never have differences that are caused by us, only by version mismatches.