Shrub's Modernized RLCraft

I completely forgot to release this one! Sorry!

Anyway, mostly little improvements to existing textures, but I made a bunch of custom BetterNether textures because for some reason most of the older stuff in it just never got a visual overhaul. I also made the LevelUp ore chunk texture... well, slightly better. There's only so much I can do within the limits of how that one works.