- add ValueChanged event

GBase/Attributes/GBaseEntryAttribute.cs

@@ -13,6 +13,9 @@ namespace GBase.Attributes
     [AttributeUsage(AttributeTargets.Property)]
     public class GBaseEntryAttribute : Attribute
     {
-        
+        /// <summary>
+        /// The value of the linked property changed
+        /// </summary>
+        public event EventHandler ValueChanged; //TODO: Automatically fire this event if the value of the linked property changes and subscribe to it in the correct IGBaseEntry
     }
 }