Using ToLowerInvariant instead of ToLower (the game works for Turkish players now!)

http://www.moserware.com/2008/02/does-your-code-pass-turkey-test.html

Subsurface/Source/GUI/ComponentStyle.cs

@@ -73,7 +73,7 @@ namespace Barotrauma
             
             foreach (XElement subElement in element.Elements())
             {
-                switch (subElement.Name.ToString().ToLower())
+                switch (subElement.Name.ToString().ToLowerInvariant())
                 {
                     case "sprite":
                         Sprite sprite = new Sprite(subElement);