Update to CLDR 27

[stuwest]

Update to CLDR 27

First commit just data files: Removes old data files and adds new ones for CLDR 27. CLDR changed the way it did JSON distributions and now offers packages we can include. The smallest one includes its top few hundred “modern” locales. That’s much more than the ~30 locales we included before, and much bigger (~50MB). We'll likely want to slim this down though if we want to load these automatically we may want to stick to their packages.

Second commit is code:

• add constant for version of JSON files
• adjust arguments and calls of get_cldr_json_file() for new package distribution format, including a helper function to identify the path of a CLDR 27 JSON package.

[jblz]

Other than the minor break issue, this looks good to go.

Nice work!