added artist/slbum xml savers

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -1142,6 +1142,19 @@ namespace MediaBrowser.Controller.Entities
             }
         }
 
+        public void AddTag(string name)
+        {
+            if (string.IsNullOrWhiteSpace(name))
+            {
+                throw new ArgumentNullException("name");
+            }
+
+            if (!Tags.Contains(name, StringComparer.OrdinalIgnoreCase))
+            {
+                Tags.Add(name);
+            }
+        }
+
         /// <summary>
         /// Adds a tagline to the item
         /// </summary>

MediaBrowser.Controller/Providers/BaseItemXmlParser.cs

@@ -65,6 +65,7 @@ namespace MediaBrowser.Controller.Providers
             item.Studios.Clear();
             item.Genres.Clear();
             item.People.Clear();
+            item.Tags.Clear();
 
             // Use european encoding as it will accept more characters
             using (var streamReader = new StreamReader(metadataFile, Encoding.GetEncoding("ISO-8859-1")))
@@ -397,6 +398,7 @@ namespace MediaBrowser.Controller.Providers
                         break;
                     }
 
+                case "PremiereDate":
                 case "FirstAired":
                     {
                         var firstAired = reader.ReadElementContentAsString();
@@ -453,6 +455,10 @@ namespace MediaBrowser.Controller.Providers
                     FetchFromGenresNode(reader.ReadSubtree(), item);
                     break;
 
+                case "Tags":
+                    FetchFromTagsNode(reader.ReadSubtree(), item);
+                    break;
+
                 case "Persons":
                     FetchDataFromPersonsNode(reader.ReadSubtree(), item);
                     break;
@@ -539,6 +545,35 @@ namespace MediaBrowser.Controller.Providers
             }
         }
 
+        private void FetchFromTagsNode(XmlReader reader, T item)
+        {
+            reader.MoveToContent();
+
+            while (reader.Read())
+            {
+                if (reader.NodeType == XmlNodeType.Element)
+                {
+                    switch (reader.Name)
+                    {
+                        case "Tag":
+                            {
+                                var tag = reader.ReadElementContentAsString();
+
+                                if (!string.IsNullOrWhiteSpace(tag))
+                                {
+                                    item.AddTagline(tag);
+                                }
+                                break;
+                            }
+
+                        default:
+                            reader.Skip();
+                            break;
+                    }
+                }
+            }
+        }
+
         /// <summary>
         /// Fetches the data from persons node.
         /// </summary>