fixed case sensitivity in ratings comparisons

MediaBrowser.Server.Implementations/Localization/LocalizationManager.cs

@@ -204,7 +204,7 @@ namespace MediaBrowser.Server.Implementations.Localization
 
             })
             .Where(i => i != null)
-            .ToDictionary(i => i.Name);
+            .ToDictionary(i => i.Name, StringComparer.OrdinalIgnoreCase);
 
             var countryCode = Path.GetFileNameWithoutExtension(file).Split('-').Last();