moved media streams to the database

MediaBrowser.Controller/Entities/Book.cs

@@ -1,7 +1,8 @@
-
+using System.Collections.Generic;
+
 namespace MediaBrowser.Controller.Entities
 {
-    public class Book : BaseItem
+    public class Book : BaseItem, IHasTags
     {
         public override string MediaType
         {
@@ -10,6 +11,11 @@ namespace MediaBrowser.Controller.Entities
                 return Model.Entities.MediaType.Book;
             }
         }
+        /// <summary>
+        /// Gets or sets the tags.
+        /// </summary>
+        /// <value>The tags.</value>
+        public List<string> Tags { get; set; }
 
         public string SeriesName { get; set; }
 
@@ -31,5 +37,10 @@ namespace MediaBrowser.Controller.Entities
                 return !IsInMixedFolder;
             }
         }
+
+        public Book()
+        {
+            Tags = new List<string>();
+        }
     }
 }