Merge pull request #544 from strongriley/master

        # Try to look up the URL twice: once given the view name, and again

        # relative to what we guess is the "main" app. If they both fail,

        # re-raise the NoReverseMatch unless we're using the

        # {% url ... as var %} construct in which cause return nothing.

        # {% url ... as var %} construct in which case return nothing.

        url = ''

        try:

            url = reverse(view_name, args=args, kwargs=kwargs, current_app=context.current_app)