Country names not according to ISO standard

[Mattists]

The values in the Country feature do not fulfill the stated ISO 3166 standards.
Mapping them to a list of ISO standard countries could possibly be the easiest way to address this in the future, one could also directly derive the Country_ISO feature
Here are some exemplary issues:

• RussianFederation vs. Russian Federation vs. Russia
• England vs. United Kingdom of Great Britain and Northern Ireland
• Western Sahara (Morocco)
• BotswanaOrNamibia

[stschiff]

This would be an easy one to fix for @Kavlahkaff or @93Boy.

[nevrome]

#230 fixes at least the examples above. But I don't know if there are more wrong country names in the dataset. Did you check this, @Kavlahkaff?

[Kavlahkaff]

All examples listed above and in this issue have been fixed. We still need to check, whether other packages different mistakes. In the future it might be good to write a script which adds country names and codes to all packages where they are missing and converts wrong casing or names to the ISO 3166 standard.