Source one shaders fixes and additions, new skin group saving method

[hisprofile]

Better Materials

(left is new, right is old)

• Shader Fixes/Additions
  • VertexLitGeneric
    • Received Lightwarp support (see the cel shading on Heavy's skin)
    • Better transparency and additive implementation (see the glow on Bolt Boy cosmetic)
    • Less broken paint regions (see the Bolt Boy cosmetic)
  • UnlitTwoTexture
    • Better implementation (see the sun beams and the capture point holograms)
  • Modulate shader added
    
• Shader General
  • Shader name and vmt parameters are stored as custom properties for materials
  • dx90 parameters are unraveled and saved into the main parameters instead

mdl porting

• .mdl importing
  • Changed the skin group saving method to save the actual material IDs instead of their names
    • REDxEYE, I swear the only way this could be implemented was to use a pseudo-pointer for materials. Using from the buffer never worked, so I used a uuid4 string instead. It works?

[hisprofile]

ready!

[hisprofile]

Anything you'd like me to do?