Provides an entity with country data from :
- https://datahub.io/core/country-codes: Comprehensive country code information, including ISO 3166 codes, ITU dialing codes, ISO 4217 currency codes, and many others.
- https://fotw.info: Flag images for most countries.
- http://areciboweb.50megs.com: Provides a mirror for fotw.info.
- https://flagpedia.net: Flag images for most countries.
- https://www.cia.gov/library/publications/the-world-factbook: Used for some missing flag images.