Teach renderer to work with and without HQ Geometry fix

Created by: Xottab-DUTY

Check out this commit: https://github.com/OpenXRay/xray-16/commit/2a91825eeb30b3cf8af6b91201a25bd4a90cd01e

This introduced support for high quality models along with the loss of compatibility with the original skin.h shader.

Renderer should dynamically detect if shaders has installed HQ geometry fix, and work correctly no matter if it's installed or not.