Convert onGrab from passing a string to passing an object with series and episode information

Use object initalizer instead of creation of OnGrab/grabmessage

src/NzbDrone.Core/Notifications/GrabMessage.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using NzbDrone.Core.MediaFiles;
+using NzbDrone.Core.Parser.Model;
+using NzbDrone.Core.Qualities;
+using NzbDrone.Core.Tv;
+
+namespace NzbDrone.Core.Notifications
+{
+    public class GrabMessage
+    {
+        public String Message { get; set; }
+        public Series Series { get; set; }
+        public RemoteEpisode Episode { get; set; }
+        public QualityModel Quality { get; set; }
+
+        public override string ToString()
+        {
+            return Message;
+        }
+    }
+}