Add Rabat-Salé-Kénitra as a region for Morocco

[jcontreras28]

I could do it and put in a PR if wanted. Only thing is Im not sure where the short codes for Morocco come from. Thank you!

[jcontreras28]

It would seem the data for Morocco is way off? Not sure if this is correct or if there is a better source? http://www.worldcitiesdb.com/Morocco/state