Strategic Industry - Gathering Storm

The goal of this mod is to add a greater sense of realism to unit production. Finally in Gathering Storm multiple resources can be utilized by units. Features Copper is now a strategic resource. It's used for Bronze Age units, cannons, and modern ammo. Nearly all units including uniques have strategic resource requirements and many require more than one resource. Example: Knight costs 20 Iron and consumes 1 Horses per turn. All land units beginning in the Modern era require the Factory. All naval units beginning in the Renaissance era require the Shipyard. Industrial Steel Enhancement: all land and naval units in the Modern and Atomic eras receive a +5 combat strength bonus if the player owns Coal. Composite Armor Enhancement: all land and naval units in the Information era receive a +5 combat strength bonus if the player owns Uranium. Industrial Zone receives a production adjacency bonus for each Lumber Mill. Copper, Iron, Niter, Coal, Aluminum and Oil spawn on a wider variety of terrains based on my own research. Strategic Resource Requirements Spearman costs 10 Copper and consumes 1 Copper per turn Heavy Chariot costs 20 Copper and consumes 1 Horses per turn Horseman costs 10 Iron and consumes 1 Horses per turn Quadrireme costs 20 Copper and consumes 1 Copper per turn Swordsman costs 20 Iron and consumes 1 Iron per turn Knight costs 20 Iron and consumes 1 Horses per turn Crossbowman costs 10 Iron and consumes 1 Iron per turn Pikeman costs 10 Iron and consumes 1 Iron per tu