Car_Killer Showroom Pack 2.3.2

Changelog:
- tweaked materials
- added new hdr based cubemaps
- added hdr based materials for emissive elements on map
- fixed no texture issues

Changelog:
- converted materials to json
- fixed issues with some paths in files

Added 2 showrooms
Fixed map for BeamNG 0.19

Added 5 showrooms to Showroom 3 map. Courtesy of @Nekkit

Added few additional showrooms in 80s style to showroom 3 map.
Courtesy of @Nekkit

Added 3 new maps to pack. Finally I decided to share these maps to everyone.

Changed reflections
Added features from 0.15