Country codes

fixes #701 did this in a bit of a hurry, i have to update regex etc, but this should work for now.
In case you don't know, you could have written this like so:
```perl
my $text = '<a href="https://en.wikipedia.org/wiki/ISO_3166-1">ISO 3166</a>:';
```
Saves escaping the `"` ^_^