Moved DecisionEngine to root of core.

NzbDrone.Core/DecisionEngine/AlreadyInQueueSpecification.cs

@@ -0,0 +1,31 @@
+using System.Linq;
+using NLog;
+using NzbDrone.Core.Model;
+using NzbDrone.Core.Providers;
+
+namespace NzbDrone.Core.DecisionEngine
+{
+    public class AlreadyInQueueSpecification
+    {
+        private readonly DownloadProvider _downloadProvider;
+
+        private static readonly Logger logger = LogManager.GetCurrentClassLogger();
+
+        public AlreadyInQueueSpecification(DownloadProvider downloadProvider)
+        {
+            _downloadProvider = downloadProvider;
+
+        }
+
+        public AlreadyInQueueSpecification()
+        {
+            
+        }
+
+        public virtual bool IsSatisfiedBy(EpisodeParseResult subject)
+        {
+            return _downloadProvider.GetActiveDownloadClient().IsInQueue(subject);
+        }
+       
+    }
+}