Update doc

Author: jcs090218

docs/ScriptReference/Interfaces/JCS_Instance.md

@@ -1,3 +1,51 @@
 # JCS_Instance
 
 Singleton instance interface.
+
+This file contain three classes.
+
+### 1) JCS_Instance
+
+See `Example.cs`:
+
+```cs
+  public class Example : JCS_Instance<Example>
+  {
+      private void Awake ()
+      {
+          instance = this;
+      }
+  }
+```
+
+### 2) JCS_InstanceOld
+
+Singleton instance interface to keep the old instance.
+
+See `ExampleOld.cs`:
+
+```cs
+  public class ExampleOld : JCS_InstanceOld<Example>
+  {
+      private void Awake ()
+      {
+          CheckInstance(this);
+      }
+  }
+```
+
+### 3) JCS_InstanceNew
+
+Check singleton for keep the old one.
+
+See `ExampleNew.cs`:
+
+```cs
+  public class ExampleNew : JCS_InstanceNew<Example>
+  {
+      private void Awake ()
+      {
+          CheckInstance(this);
+      }
+  }
+```

docs/ScriptReference/Interfaces/JCS_Settings.md

@@ -17,10 +17,10 @@ Interface of all setting class.
 
 ## Example
 
-ExampleSetting.cs
+Example.cs
 
 ```cs
-  public class ExampleSetting : MonoBehaviour
+  public class Example : JCS_Settings<Example>
   {
       private void Awake ()
       {