Use DownloadClientIds to find matching series/episodes instead of relying solely on release name

Fixed: Show a warning in Queue when drone is unable to import due to a name mismatch
Fixed: Better UI messages for Queue when there is an error or warning

src/NzbDrone.Core/Download/DownloadItemStatus.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace NzbDrone.Core.Download
+namespace NzbDrone.Core.Download
 {
     public enum DownloadItemStatus
     {