listplaylists command created + test.

LibMpc/Types/MpdPlaylist.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Globalization;
+
+namespace LibMpc.Types
+{
+    public class MpdPlaylist
+    {
+        public MpdPlaylist(string name)
+        {
+            name.CheckNotNull();
+
+            Name = name;
+        }
+
+        public string Name { get; }
+        public DateTime LastModified { get; private set; }
+
+        internal void AddLastModified(string lastModified)
+        {
+            LastModified = DateTime.Parse(lastModified, CultureInfo.InvariantCulture);
+        }
+    }
+}