allows tools and armor to be upgraded with smithing table.
horse armor can be upgraded
armor: leather with chain to chainmali, chainmail with iron ingot to iron, iron with gold ingot to golden, golden with diamond to diamond (in version 1.2.0 the order is leather-chainmail-iron-diamond. and you can upgrade gold armor to iron)
tools; wooden with stone, stone with iron to iron, iron with gold ingot to golden, golden with diamond to diamond
adds option to craft smithing table with stone instead of iron (in version 1.1.0 and higher)