Merge FileFormats dll into Game and reorganise namespaces.

OpenRA.Game/Widgets/WorldInteractionControllerWidget.cs

@@ -13,9 +13,9 @@ using System.Collections.Generic;
 using System.Drawing;
 using System.Linq;
 using OpenRA.Effects;
-using OpenRA.FileFormats;
 using OpenRA.Graphics;
 using OpenRA.Orders;
+using OpenRA.Primitives;
 using OpenRA.Traits;
 
 namespace OpenRA.Widgets