Kappa Shader v3.1 Preview E1

Oi, this preview is a bit outside of my initial schedule but I came up with a couple minor additions that seemed nice.

- added localized cloud coverage
- added cloud shadows
- redid out of the box color grading
- atmosphere adjustments
- added sun disc to the end
- adjusted volumetric fog
- improved auto exposure behavior
- minor improvements to cirrus clouds
- improved global illumination
- reduced RSM bleeding
- improved water waves
- added various new settings
- added support for anamorphic depth of field (currently only in full version)