Enriched Naquadah and Naquadria availibility

[laurynasl (Laurynas Liutkus)]

@Gregorius

Because getting Plutonium from Uranium Ore is not very balanced whatsoever, especially with how abundant Ores are in Minecraft.

I still think that thorium (maybe also pitchblende) should have uraninite byproduct, because it causes no plutonium balance problems and byproducts are fun.