title: The "EnsureBindingRedirects" task failed unexpectedly
body: <p>When I create new <code>ASP.NET 4.5</code> web forms application from <code>vs2012</code> and update all <code>nuget</code> packages, I receive this error on build:</p>
  
  <blockquote>
    <p>Error 1   The "EnsureBindingRedirects" task failed unexpectedly.
        System.NullReferenceException: Object reference not set to an instance of an object.
           at Roxel.BuildTasks.EnsureBindingRedirects.MergeBindingRedirectsFromElements(IEnumerable`1 dependentAssemblies)
           at Roxel.BuildTasks.EnsureBindingRedirects.Execute()
           at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
           at Microsoft.Build.BackEnd.TaskBuilder.d__20.MoveNext()</p>
  </blockquote>