Chest Cavity [Fabric]

Additions:
-Creepers now contain shifting leaves, which provide speed and photosynthesis.
-Sets of 4 shifting leaves can be salvaged to get oak leaves.
-Photosynthesis is an organ ability which restores hunger and saturation over time at a rate that scales with light intensity.
-Saltwater Muscles can be crafted from 8 muscles and a nautilus shell, adding some swim speed and fire vulnerability to the muscles. (Thank you to Raylo for the idea and sprite!)

Changes:
-Rotgut and Rot Digestion no longer poison users when eating non-rotten foods.
-Nerves no longer reduces movement speed unless you have 0 nerves.
-Nerves now modifies attack speed and mining speed, equal to half a rank of haste per point.
-Most organs that grant nerves have had their values tweaked to reflect the ability's increased value.