PostDownloadProvider broken down further.

Will try to reprocess _NzbDrone_ directories each pass, but will mark with an error when possible.
Attempt to process _UNPACK_ and _FAILED_ directories 30 minutes after first detected by NzbDrone (to give SAB time to unpack properly before processing).

NzbDrone.Core/Model/PostDownloadInfoModel.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace NzbDrone.Core.Model
+{
+    public class PostDownloadInfoModel
+    {
+        public string Name { get; set; }
+        public DateTime Added { get; set; }
+        public PostDownloadStatusType Status { get; set; }
+    }
+}