Material import case sensitivity fix

Fix material import where name check case sensitivity broke the import buttons.

Add automatic backface culling

Quick patch to automatically enable backface culling for any goldsrc imports.

Fix material import on Windows.

I use Arch btw.

Fix material import.

Fixes a bug in material import using the old function, due to uncommitted changes from my disk (whoooops).

Support xash mdldec

Just a small fix to support xash's mdldec, as it seems to place the textures in a subfolder.

Fix a bug in baker

Add safety checks to baker to stop it catastrophically failing
Fix a bug where baker would fail if the scene hierarchy had the high poly before low poly object (apparently selection order from scripting is a lie in blender)

Object level vertexbones

Added ability to make vertexbones on an object level for physics sims.
Also changed behavior of vertexbone creation, so that it merges into existing one if possible instead of making a copy.

fix updater (again)

i swear no other project of mine is this janky

goldsrc:tm: tweaks

Changed proxy copy logic a bit

VertexBones

In edit mode's vertex menu: New option "vertex bones: make from selected" which will take the selected vertices, and make a proxy object & armature with said vertices rigged into bones controlled by the original mesh's vertices. Effectively allowing one to turn vertex animation into bone animation for goldsrc and others.