Add VRChat and GitHub packages to Unity project

Assets/VRCSDK/Sample Assets/Editor/RealtimeEmissiveGammaGUI.cs

@@ -0,0 +1,14 @@
+using UnityEngine;
+using UnityEditor;
+
+public class RealtimeEmissiveGammaGUI : ShaderGUI 
+{
+    public override void OnGUI (MaterialEditor materialEditor, MaterialProperty[] properties)
+    {
+        base.OnGUI (materialEditor, properties);
+
+        Material mtl = materialEditor.target as Material;
+        mtl.globalIlluminationFlags = MaterialGlobalIlluminationFlags.RealtimeEmissive;
+
+    }
+}