Add VRChat and GitHub packages to Unity project

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

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+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;
+
+    }
+}

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

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+timeCreated: 1530211326
+licenseType: Pro
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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