add filters to folder browsing

MediaBrowser.Model/Entities/PersonType.cs

@@ -30,5 +30,9 @@ namespace MediaBrowser.Model.Entities
         /// The guest star
         /// </summary>
         public const string GuestStar = "GuestStar";
+        /// <summary>
+        /// The producer
+        /// </summary>
+        public const string Producer = "Producer";
     }
 }

MediaBrowser.Server.Implementations/Library/LibraryManager.cs

@@ -630,7 +630,7 @@ namespace MediaBrowser.Server.Implementations.Library
         {
             cancellationToken.ThrowIfCancellationRequested();
 
-            _logger.Debug("Creating {0}: {1}", typeof(T).Name, name);
+            _logger.Debug("Getting {0}: {1}", typeof(T).Name, name);
 
             path = Path.Combine(path, FileSystem.GetValidFilename(name));
 
@@ -694,7 +694,7 @@ namespace MediaBrowser.Server.Implementations.Library
 
             var tasks = new List<Task>();
 
-            var includedPersonTypes = new[] { PersonType.Actor, PersonType.Director, PersonType.GuestStar };
+            var includedPersonTypes = new[] { PersonType.Actor, PersonType.Director, PersonType.GuestStar, PersonType.Writer, PersonType.Director, PersonType.Producer };
 
             var people = RootFolder.RecursiveChildren
                 .Where(c => c.People != null)