整理代码结构，支持Package Manager添加

Demo/Runtime/Demo_Test.cs

@@ -0,0 +1,41 @@
+/******************************************/
+/*                                        */
+/*     Copyright (c) 2018 monitor1394     */
+/*     https://github.com/monitor1394     */
+/*                                        */
+/******************************************/
+
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace XCharts
+{
+    [DisallowMultipleComponent]
+    [ExecuteInEditMode]
+    public class Demo_Test : MonoBehaviour
+    {
+        LineChart chart;
+        void Awake()
+        {
+            chart = gameObject.GetComponent<LineChart>();
+            if (chart == null)
+            {
+                chart = gameObject.AddComponent<LineChart>();
+            }
+
+            var buttom = transform.parent.gameObject.GetComponentInChildren<Button>();
+            buttom.onClick.AddListener(AddData);
+        }
+
+        void AddData()
+        {
+            chart.series.list[0].ClearData();
+            chart.series.list[1].ClearData();
+            for (int i = 0; i < 5; i++)
+            {
+                chart.AddData(0, Random.Range(20, 100));
+                chart.AddData(1, Random.Range(1, 10));
+            }
+        }
+    }
+}