ISO Prolog resources

[triska]

Hi Klaus,

please have a look at this comprehensive collection of resources that are related to the Prolog ISO standard:

http://www.complang.tuwien.ac.at/ulrich/iso-prolog/

This could be useful for implementors. Maybe it would be a useful addition?

[XVilka]

@klaussinani Any updates on this?

[klaudiosinani]

PR welcome :)