added model classes for remote control

MediaBrowser.Model/Session/PlaystateRequest.cs

@@ -0,0 +1,53 @@
+
+namespace MediaBrowser.Model.Session
+{
+    /// <summary>
+    /// Class PlaystateRequest
+    /// </summary>
+    public class PlaystateRequest
+    {
+        /// <summary>
+        /// Gets or sets the command.
+        /// </summary>
+        /// <value>The command.</value>
+        public PlaystateCommand Command { get; set; }
+
+        /// <summary>
+        /// Gets or sets the seek position.
+        /// Only applicable to seek commands.
+        /// </summary>
+        /// <value>The seek position.</value>
+        public long SeekPosition { get; set; }
+    }
+
+    /// <summary>
+    /// Enum PlaystateCommand
+    /// </summary>
+    public enum PlaystateCommand
+    {
+        /// <summary>
+        /// The stop
+        /// </summary>
+        Stop,
+        /// <summary>
+        /// The pause
+        /// </summary>
+        Pause,
+        /// <summary>
+        /// The unpause
+        /// </summary>
+        Unpause,
+        /// <summary>
+        /// The next track
+        /// </summary>
+        NextTrack,
+        /// <summary>
+        /// The previous track
+        /// </summary>
+        PreviousTrack,
+        /// <summary>
+        /// The seek
+        /// </summary>
+        Seek
+    }
+}