XSFur 2.0 update (Patreon)

Hi all! Been awhile, but I'm here with some new stuff!

This is an update to XSFur - and fixes a lot of bugs. Some features (such as toon shading / transmission) are currently missing, and some wont be making a return (such as the fake light direction)

Toon shading / Transmission will be re added tomorrow (ran out of steam today), and will be posted as a 2.0.1 update!

The shader is now based off of my new templates in terms of its lighting model and features, meaning that it supports things such as anisotropic reflections now!

Also new : XSFur finally has a custom UI! No more crappy default shader UI! YAY!

As far as bugs go, the main one that is fixed is that lightmapping no longer requires you to toggle a checkbox, and cutout/alpha textures on the material will now cast shadows properly!

EDIT: Updated shader to fix a case where specularity would cause NaN, compiler error when lightmapped, and fix Editor script erroring out.