added new projects and some base code for persistence

Tv7Playlist.Data/PlaylistEntry.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace Tv7Playlist.Data
+{
+    public class PlaylistEntry
+    {
+        public Guid Id { get; set; }
+
+        public int TrackNumber { get; set; }
+
+        public string Name { get; set; }
+        
+        public string Url { get; set; }
+    }
+}