Eugene Shinn

RaygunClient.SendInBackground() does not set Version to AssemblyVersion in ASP.NET

1

It appears that `RaygunClient.SendInBackground()` cannot get the AssemblyVersion in ASP.NET because it calls [RaygunClient.BuildMessage()](https://github.com/MindscapeHQ/raygun4net/blob/master/Mindscape.Raygun4Net/RaygunClient.cs#L369) from a [ThreadPool queued work item](https://github.com/MindscapeHQ/raygun4net/blob/master/Mindscape.Raygun4Net/RaygunClient.cs#L308) so `HttpContext.Current` is null when `RaygunMessageBuilder.SetVersion(string)` looks at it. Repro...