Unseen's Nether Backport

Changes

• Animation System update, removed sin and converted to partialtick from minecrafts engine. Animations should be smoother as well as some other fixes from the system.
• #59 - PR Request submission of piglins writing NBT in the read method. (This was an accidental carryover from UDA in the past).

PR Request from PhoenixStarz

• Fixes Basalt Deltas generation above nether roof.
• Crimson & Warped Buttons, Fence Gates, pressure plates and fix with trap door having correct and working recipe.
• Added more support for block types for the Netherrack corruption on spawning nether portals in the overworld. The corruption is more centered on the portals spawning.
• Fixed Nether portals spawning in a line at random. As well as a huge improvement to the checks and how they generate.

Very much thanks to those that have submitted PR requests to keep this project more fine tuned! You are the bastion that keeps this mod forward!