Snek's Improvements and Consistencies

-Fixed the Iron Chain to use the Iron paletted textures, they broke since they were renamed to “Iron Chains” and I forgot to rename the texture pngs.
-Made Copper Torches and Lanterns use the proper desaturated Fire color. 
-Updated the Nautilus Armor, Horse Armor, and Spears to use the material palettes this pack uses.
-Updated Nautilus textures so they’re always depicted as square and with the same color palette.
-Added back the oxidation onto Raw Copper and Copper Ore, I was wrong in thinking that didn’t make sense.
-Made Half hunger icon slightly more clear that it’s half a hunger.
-Made minor changes so that new stuff is consistent, like gave the Camel Husk the same new Saddle texture as the normal Camel, and updating Leather Horse Armor.
-Made a few minor tweaks.