Post'n'Stuff V4.2 - Stronger but Softer Godrays

Changes:
- Increased default godray strength, length, and density so the shafts are much more visible.
- Lowered the effective brightness/peak glare of the rays so they do not blast the screen when you look toward them.
- Added highlight compression to the godray contribution, so they stay broad and strong without feeling blinding.

New defaults:
- GODRAY_STRENGTH = 1.10
- GODRAY_LENGTH = 0.95
- GODRAY_DENSITY = 0.84
- GODRAY_SUNSET_BOOST = 0.80
