Refactor to UPM unity package convention

Documentation~/index.md

@@ -0,0 +1,59 @@
+#EXAMPLE
+
+```csharp
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using PortMidi;
+
+public class Test : MonoBehaviour
+{
+    Stream stream;
+    float previousTime;
+    bool state = false;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        NativeMethods.Initialize();
+        Debug.Log("Default Input : " + NativeMethods.DefaultInputDeviceID());
+        Debug.Log("Default Output : " + NativeMethods.DefaultOutputDeviceID());
+        Debug.Log("Number of device " + NativeMethods.CountDevices());
+        for (int i = 0; i < NativeMethods.CountDevices(); i++)
+        {
+            PmDeviceInfo deviceInfo = NativeMethods.Info(i);
+            Debug.Log("    [" + i + "](" + deviceInfo.structVersion + "," + deviceInfo.interf + "," + deviceInfo.name + "," + deviceInfo.input + "," + deviceInfo.output + "," + deviceInfo.opened + ")");
+        }
+        stream = NativeMethods.NewOutputStream(3, 1024, 0);
+        previousTime = Time.realtimeSinceStartup;
+    }
+
+    void OnDestroy()
+    {
+        NativeMethods.Close(stream);
+        NativeMethods.Terminate();
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        if (Time.realtimeSinceStartup - previousTime >= 1)
+        {
+            if (state)
+            {
+                NativeMethods.WriteShort(stream, 0x90, 60, 100);
+                NativeMethods.WriteShort(stream, 0x90, 64, 100);
+                NativeMethods.WriteShort(stream, 0x90, 67, 100);
+            }
+            else
+            {
+                NativeMethods.WriteShort(stream, 0x80, 60, 100);
+                NativeMethods.WriteShort(stream, 0x80, 64, 100);
+                NativeMethods.WriteShort(stream, 0x80, 67, 100);
+            }
+            state = !state;
+            previousTime = Time.realtimeSinceStartup;
+        }
+    }
+}
+```