Added new stocking scope to shader gui;

Added new stocking surface feature;
Added unity 6.3 support;

Fixed the issue that ssr weight does not blend ibl and ssr properly;
Fixed the issue that material recive ssr regardless of specular ambient mode;

Editor/MeterialEditor/UTSShaderGUI.cs

@@ -31,15 +31,19 @@ namespace Misaki.HdrpToon.Editor
 
         private void OnInitialize(MaterialEditor materialEditor, MaterialProperty[] properties)
         {
-            AddUIScope(new SurfaceOptionsScope());
-            AddUIScope(new ShadingColorScope());
-            AddUIScope(new ShadowScope());
-            AddUIScope(new SurfaceInputsScope());
-            AddUIScope(new AmbientScope());
-            AddUIScope(new RimLightScope());
-            AddUIScope(new AngelRingScope());
-            AddUIScope(new OutlineScope());
-            AddUIScope(new AdvanceScope());
+            AddUIScope<SurfaceOptionsScope>();
+            AddUIScope<ShadingColorScope>();
+            AddUIScope<ShadowScope>();
+            AddUIScope<SurfaceInputsScope>();
+            AddUIScope<AmbientScope>();
+
+            // Surface Features
+            AddUIScope<AngelRingScope>();
+            AddUIScope<RimLightScope>();
+            AddUIScope<StockingScope>();
+
+            AddUIScope<OutlineScope>();
+            AddUIScope<AdvanceScope>();
 
             Initialize(materialEditor, properties);