Specific Subtitle tags (such as nlsub) can now be whitelisted and will be downloaded.

Fixes #540 and fixes a lot of other requests.

src/NzbDrone.Core/Configuration/IConfigService.cs

@@ -49,6 +49,7 @@ namespace NzbDrone.Core.Configuration
 	int AvailabilityDelay { get; set; }
 
 	bool AllowHardcodedSubs { get; set; }
+	string WhitelistedHardcodedSubs { get; set; }
 
         int NetImportSyncInterval { get; set; }
 	string ListSyncLevel { get; set; }