More special exports added.

Also added, and I forgot to mention this in the planned features, 'specialist buildings'. The list will expand, but you've got some to look at now. You'll find them under the lists of exports. 

Basically you can build them, if you have the right resources, and they give you bonuses. Will now be working on Region Bonuses/Abilities, which you will all be able to choose ONE of when I've unveiled them.