[SFM] Custom models + test

Small test animation to bring custom models to life.

[@christopherwolfer5197]

Well done

[@eurekify1563]

Wow... thats really great!

[@brihives]

Thank you!

[@xscitobor1233]

what were those voice lines from?

[@brihives]

Barney's voice from HL2, but I lowered the pitch to 94