Toon shading model

@Nate

I tried to port it myself yesterday but I think they changed up some things after adding forward shading in 4.14.

I get an error:


Failed to compile global shader FTiledDeferredLightingCS1 Line 986 in GlobalShader.cpp

Which is piece of code:


UE_LOG(LogShaders, Fatal, TEXT("Failed to compile global shader %s %s %s.  Enable 'r.ShaderDevelopmentMode' in ConsoleVariables.ini for retries."),
			GlobalShaderType->GetName(),
			Pipeline ? TEXT("for pipeline") : TEXT(""),
			Pipeline ? Pipeline->GetName() : TEXT(""));