Invasion tweaks.

Glorval

I think it would be nice if my massive quarries still yeilded things like iron, yellow stone, and more importantly, blue crystal. It is kinda annoying to just sit and wait for that stuff to get pulled from magic mines when in sandbox I can just mine all of that right from the ground. Without the crystal being in the ground I have to send my men off to mine in the mines instead of gathering stone while getting some of the other stuff too.