Don't return series as subtype for /api/episode

Fixed: Sped up loading episodes from server

src/NzbDrone.Api/Episodes/EpisodeModule.cs

@@ -36,5 +36,10 @@ namespace NzbDrone.Api.Episodes
         {
             _episodeService.SetEpisodeMonitored(episodeResource.Id, episodeResource.Monitored);
         }
+
+        protected override List<EpisodeResource> LoadSeries(List<EpisodeResource> resources)
+        {
+            return resources;
+        }
     }
-}
+}

src/NzbDrone.Api/Episodes/EpisodeModuleWithSignalR.cs

@@ -79,7 +79,8 @@ namespace NzbDrone.Api.Episodes
         {
             var resources =  base.ToListResource(modelList);
 
-            return resources.LoadSubtype<EpisodeResource, SeriesResource, Core.Tv.Series>(e => e.SeriesId, _seriesService.GetSeries).ToList();
+            return LoadSeries(resources);
+
         }
 
         public void Handle(EpisodeGrabbedEvent message)
@@ -100,5 +101,10 @@ namespace NzbDrone.Api.Episodes
                 BroadcastResourceChange(ModelAction.Updated, episode.Id);
             }
         }
+
+        protected virtual List<EpisodeResource> LoadSeries(List<EpisodeResource> resources)
+        {
+            return resources.LoadSubtype<EpisodeResource, SeriesResource, Core.Tv.Series>(e => e.SeriesId, _seriesService.GetSeries).ToList();
+        }
     }
-}
+}