Update 2.5.1

# 2.5.1
## Content
- World generation revamped: more vertical biome layers, biome variety
- New blocks and foliage
- New hungry entity
- New big pig entity
- Custom sprites for rename pencil
- More fanart backgrounds
## Bug fixes
- Fixed shovel hand sprite
- Added missing music to waveforms menu
- Fixed boss comets exploding while the game was paused
- Fixed radiation burn memory leak
## Tweaks
- Tiamana leylines no longer shine in progression-disabled worlds
- Invert look Y added as a setting
- Capsules for some rare entities made available
- Ice is now transparent
- Reorganized items
- Reduced fog density
- Shaders now also compile on version updates