Designer:

- Door Linking implementation started.
 - Duplicate directions are not allowed within a Room
 - If a User enters the name of a non-existing Room for linking to a Doorway, the Designer generates that Room for the User.
 - Room Editor now refreshes it's list of Rooms after the Doorway Manager closes so that auto generated Rooms are displayed.
 - Added new Doorway Manager UI

Engine:
 - Added Door.DoorwayExist() method to the Door class.

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

@@ -56,10 +56,5 @@ namespace MudDesigner.MudEngine.GameObjects.Environment
             ConnectedRoom = connectedRoom;
             TravelDirection = travelDirection;
         }
-
-        public override string ToString()
-        {
-            return this.TravelDirection.ToString();
-        }
     }
 }