优化性能，优化折线图和柱状图的大数据绘制，重构代码

Runtime/Object/ChartObject.cs

@@ -0,0 +1,22 @@
+/******************************************/
+/*                                        */
+/*     Copyright (c) 2018 monitor1394     */
+/*     https://github.com/monitor1394     */
+/*                                        */
+/******************************************/
+
+using System;
+using UnityEngine;
+
+namespace XCharts
+{
+    public class ChartObject
+    {
+        protected GameObject m_GameObject;
+
+        public virtual void Destroy()
+        {
+            GameObject.Destroy(m_GameObject);
+        }
+    }
+}