Now checking for errors before parsing newznab feeds

NzbDrone.Core/Indexers/Exceptions/ApiKeyException.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NzbDrone.Common.Exceptions;
+
+namespace NzbDrone.Core.Indexers.Exceptions
+{
+    public class ApiKeyException : NzbDroneException
+    {
+        public ApiKeyException(string message, params object[] args) : base(message, args)
+        {
+        }
+
+        public ApiKeyException(string message) : base(message)
+        {
+        }
+    }
+}