can someone please explain more or less quantitatively the new resources (lumber, leather ... ) i.e. how much are the bonuses like "this camp gives leather per unimproved forest"? do roads count as improvements? how much are the bonuses these resources provide when building stuff? i assume the resources get consumed when building, although i don't ever see my stocks diminishing. at what rate do they get consumed? what am i getting from those mana shrines and witches huts?