Changed IFolder implementations' priorities to be based on listing order in mod.yaml

OpenRA.Game/Map.cs

@@ -184,7 +184,7 @@ namespace OpenRA
 		public void Save(string filepath)
 		{
 			// Todo: save to a zip file in the support dir by default
-			Package = new Folder(filepath);
+			Package = new Folder(filepath, 0);
 			MapFormat = 3;
 			
 			var root = new List<MiniYamlNode>();