Blacklisting improvements

New: New releases that fail will be retried a second time after waiting 1hr (configurable)
Fixed: Blacklisting releases with the same date and vastly different ages

src/NzbDrone.Core/Configuration/IConfigService.cs

@@ -19,6 +19,10 @@ namespace NzbDrone.Core.Configuration
         Boolean AutoRedownloadFailed { get; set; }
         Boolean RemoveFailedDownloads { get; set; }
         Boolean EnableFailedDownloadHandling { get; set; }
+        Int32 BlacklistGracePeriod { get; set; }
+        Int32 BlacklistRetryInterval { get; set; }
+        Int32 BlacklistRetryLimit { get; set; }
+
 
         //Media Management
         Boolean AutoUnmonitorPreviouslyDownloadedEpisodes { get; set; }