- Zones build their Room collection during instancing.

- Zones can not be instanced without providing the owning realm in its constructor.
 - Started adding tooltips to the editors.
 - Zone Builder now checks if a Realm has been loaded yet or not prior to creating Zones.
 - Zone Builder will not allow Rooms to be created within new Zones until the Zone has been saved.
 - Zone Builder checks if a New Zone has not been saved yet prior to creating another New Zone
 - Renamed Room.ParentZone to Room.Zone to be consistent with the Realm and Zone classes.

Mud Designer/MudEngine/GameObjects/Environment/Room.cs

@@ -37,7 +37,7 @@ namespace MudDesigner.MudEngine.GameObjects.Environment
         public List<Door> InstalledDoors;
 
         [Browsable(false)]
-        public string ParentZone
+        public string Zone
         {
             get;
             set;