{% macro panel(title, description=None, class="default") -%}
  <div class="row">
    <div class="col-md-3">
      <h3>{{ title }}</h3>
      {% if description %}<p>{{ description }}</p>{% endif %}
    </div>
    <div class="col-md-9">{{ caller() }}</div>
  </div>
  <hr />
{%- endmacro %}
