整理代码结构，支持Package Manager添加

Demo/Editor/ChartModuleDrawer.cs

@@ -1,4 +1,11 @@
-using UnityEditor;
+/******************************************/
+/*                                        */
+/*     Copyright (c) 2018 monitor1394     */
+/*     https://github.com/monitor1394     */
+/*                                        */
+/******************************************/
+
+using UnityEditor;
 using UnityEngine;
 
 namespace XCharts

Demo/Editor/ChartModuleDrawer.cs.meta

@@ -1,5 +1,5 @@
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-guid: 97c0f1cf754c54fd1913ec5b4129c6e5
+guid: 2fbbaed3e670f478c844c1bdfc73d433
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Demo/Editor/DemoEditor.cs

@@ -1,5 +1,12 @@
-using UnityEditor;
-using UnityEngine;
+
+/******************************************/
+/*                                        */
+/*     Copyright (c) 2018 monitor1394     */
+/*     https://github.com/monitor1394     */
+/*                                        */
+/******************************************/
+
+using UnityEditor;
 
 namespace XCharts
 {

Demo/Editor/DemoEditor.cs.meta

@@ -1,5 +1,5 @@
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-guid: bc37c9f35cd6b4f0f936526a63fb19a5
+guid: 90c1787bea03849c8b6d19be625b7e17
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Demo/Editor/XCharts.Editor.Demo.asmdef

@@ -0,0 +1,17 @@
+{
+    "name": "XCharts.Editor.Demo",
+    "references": [
+        "XCharts.Demo.Runtime",
+        "XCharts.Runtime"
+    ],
+    "optionalUnityReferences": [],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": []
+}

Demo/Editor/XCharts.Editor.Demo.asmdef.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 2d3606aaaf73f468984f4615b496f408
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: