added model classes for remote control

MediaBrowser.Model/Session/BrowseRequest.cs

@@ -0,0 +1,37 @@
+
+namespace MediaBrowser.Model.Session
+{
+    /// <summary>
+    /// Class BrowseRequest
+    /// </summary>
+    public class BrowseRequest
+    {
+        /// <summary>
+        /// Artist, Genre, Studio, Person, or any kind of BaseItem
+        /// </summary>
+        /// <value>The type of the item.</value>
+        public string ItemType { get; set; }
+
+        /// <summary>
+        /// Artist name, genre name, item Id, etc
+        /// </summary>
+        /// <value>The item identifier.</value>
+        public string ItemIdentifier { get; set; }
+
+        /// <summary>
+        /// Gets or sets the context (Movies, Music, Tv, etc)
+        /// Applicable to genres, studios and persons only because the context of items and artists can be inferred.
+        /// This is optional to supply and clients are free to ignore it.
+        /// </summary>
+        /// <value>The context.</value>
+        public string Context { get; set; }
+    }
+
+    public class ItemContext
+    {
+        public const string Music = "Music";
+        public const string Movies = "Movies";
+        public const string TvShows = "TvShows";
+        public const string Games = "Games";
+    }
+}