NVIDIA GameWorks Integration

Hey kostenickj~ thanks for update!
So, I’ve pulled latest updates. It compiles without problems.
However opening example map, the HairWorks component inside BP actors doesn’t visualize hair. More over if I try to compile blueprint with HW component the editor crashes.
I’ve created new project with build and created empty BP actor and only added HW component. BP compile still crashes UE4. Debug on crash shows that HairWorksComponent.cpp on line 567 trying to access null by HairInstance.HairMaterial pointer.

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