Dev news : added deepslate top and WIP rework of deepslate variants (Patreon)

I'm not satisfied with current deepslate designs. I could go for a much more realistic style but I'd lose the vanilla features I'd wish to keep- so I'm making some adjustments to find the sweet spot I'm going for.

This is not the final design yet, but I still wanted to show the changes I made to deepslate. 

I also added the deepslate top texture so the blocks are complete.

Shaders:
Substance Render (1)
Continuum 2.1 alpha build 12 (2-4)
Chocapic v9.1 extreme PBR test 2 (5)
Kappa v4.1 (6-7)
SEUS PTGI HRR 2.1 with GFME 1.5 (8-9)