More Iron per Ore Chunk

It was suggested that I make a version of my wood mod for stone and iron as well. This one modifies RawMaterialIron.rsc. Uneducated laborers now produce 3 iron bars per ore lump gathered, and educated workers produce 5. This may also alter how quickly a mine produces iron. I also needed to reduce the weight of iron so that the larger piles could be carried by a regular citizen! Iron now weighs 8 units. Like the wood mod, it will make the game considerably easier by greatly increasing your iron supply, and may be considered a cheat.