[Addon] One click HDRI lighting setup

[Harvester]

Hi. I do used this add-on a lot in the past so this is my first attempt to fix it for Blender 2.80:

init.py|attachment (27.2 KB)

I have submitted this patch to the author on GitHub (https://github.com/Nikos-Prinios/HDRI-lighting-Shortcut/issues/2)