500 error handler.

        Templates: `500.html`
        Context:
            MEDIA_URL
                Path of static media (e.g. "media.example.org")
            STATIC_URL

def handler500(request, template_name='500.html'):
    """
        500 error handler.

        Templates: `500.html`
        Context:
            MEDIA_URL
                Path of static media (e.g. "media.example.org")
            STATIC_URL
    """
    t = loader.get_template(template_name) # You need to create a 500.html template.
    return http.HttpResponseServerError(t.render(Context({
        'MEDIA_URL': settings.MEDIA_URL,
        'STATIC_URL': settings.STATIC_URL
    })))