upgraded to autofac 3. created nancy only mode for nzbdrone.exe /n

NzbDrone.Common/EnsureThat/EnsureNullableValueTypeExtensions.cs

@@ -0,0 +1,17 @@
+using System.Diagnostics;
+using NzbDrone.Common.EnsureThat.Resources;
+
+namespace NzbDrone.Common.EnsureThat
+{
+    public static class EnsureNullableValueTypeExtensions
+    {
+        [DebuggerStepThrough]
+        public static Param<T?> IsNotNull<T>(this Param<T?> param) where T : struct
+        {
+            if (param.Value == null || !param.Value.HasValue)
+                throw ExceptionFactory.CreateForParamNullValidation(param.Name, ExceptionMessages.EnsureExtensions_IsNotNull);
+
+            return param;
+        }
+    }
+}