Nostalgia Shader v3.0 Preview E5 (Patreon)

And here is another batch of changes:

- improved cloud lighting
- added ice handling
- improved vps and fixed various artifacts
- adjusted exposure behaviour
- fixed dithering not preserving overall luminance
- adjusted sky colors
- refactored ACES internals
- improved TAA
- improved water waves and caustics
- switched to hammon diffuse model by default

Next up would most likely be dimensions and some final resourcepack stuffs and its feature complete.