Added api methods to get movie special features

MediaBrowser.Api/HttpHandlers/MovieSpecialFeaturesHandler.cs

@@ -0,0 +1,49 @@
+using MediaBrowser.Common.Net.Handlers;
+using MediaBrowser.Model.DTO;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.Entities.Movies;
+using System.ComponentModel.Composition;
+using System.Linq;
+using System.Net;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Api.HttpHandlers
+{
+    /// <summary>
+    /// This handler retrieves special features for movies
+    /// </summary>
+    [Export(typeof(BaseHandler))]
+    public class MovieSpecialFeaturesHandler : BaseSerializationHandler<DTOBaseItem[]>
+    {
+        public override bool HandlesRequest(HttpListenerRequest request)
+        {
+            return ApiService.IsApiUrlMatch("MovieSpecialFeatures", request);
+        }
+
+        protected override Task<DTOBaseItem[]> GetObjectToSerialize()
+        {
+            User user = ApiService.GetUserById(QueryString["userid"], true);
+
+            Movie movie = ApiService.GetItemById(ItemId) as Movie;
+
+            // If none
+            if (movie.SpecialFeatures == null)
+            {
+                return Task.FromResult<DTOBaseItem[]>(new DTOBaseItem[] { });
+            }
+
+            return Task.WhenAll<DTOBaseItem>(movie.SpecialFeatures.Select(i =>
+            {
+                return ApiService.GetDTOBaseItem(i, user, includeChildren: false, includePeople: true);
+            }));
+        }
+
+        protected string ItemId
+        {
+            get
+            {
+                return QueryString["id"];
+            }
+        }
+    }
+}