* Do database implementation for prim inventory items in mysql

* Properly clean up items when a region object is deleted
* Update persisted prim when an inventory script is changed
* No user functionality yet

OpenSim/Region/Environment/Scenes/SceneObjectGroup.Inventory.cs

@@ -235,6 +235,13 @@ namespace OpenSim.Region.Environment.Scenes
             if (part != null)
             {
                 part.UpdateInventoryItem(item);
+
+                // It might seem somewhat crude to update the whole group for a single prim inventory change,
+                // but it's possible that other prim inventory changes will take place before the region 
+                // persistence thread visits this object.  In the future, changes can be signalled at a more
+                // granular level, or we could let the datastore worry about whether prims have really 
+                // changed since they were last persisted.
+                HasChanged = true;                
                 
                 return true;
             }