Merge metadata changes from upstream r715
Generated Python files for metadata
Merge code changes from upstream r715

Also add and expose COUNTRY_CODES_FOR_NON_GEO_REGIONS,
and add an internal method to re-generate globals derived
from the metadata.
Prep for 7.0.0 release
Fixup imports/exports

Add new COUNTRY_CODES_FOR_NON_GEO_REGIONS export.
Add missing import of NON_DIGITS_PATTERN.