move child definitions to db

MediaBrowser.Controller/Entities/ChildDefinition.cs

@@ -0,0 +1,22 @@
+using System;
+
+namespace MediaBrowser.Controller.Entities
+{
+    /// <summary>
+    /// Class ChildDefinition
+    /// </summary>
+    public class ChildDefinition
+    {
+        /// <summary>
+        /// Gets or sets the item id.
+        /// </summary>
+        /// <value>The item id.</value>
+        public Guid ItemId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the type.
+        /// </summary>
+        /// <value>The type.</value>
+        public string Type { get; set; }
+    }
+}