Merge pull request 'add dao' (#1) from develop into master

Reviewed-on: #1

data/DAO/Presence.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace data.DAO
+{
+    internal class Presence
+    {
+    }
+}