{% macro flash_me() -%}
    {% with messages = get_flashed_messages(with_categories=true) %}
        {% if messages %}
        {% for category, message in messages %}
            <div class="alert {{ category }}" role="alert">{{ message }}</div>
        {% endfor %}
        {% endif %}
    {% endwith %}
{% endmacro %}

{% macro header(main, second) %}
    <header class="jumbotron subhead" id="overview" >
        <div class="container">
            <h1>{{ main }}</h1>
            <p class="lead">
               {{ second }}
            </p>
        </div>
    </header>

    {{ flash_me() }}
{% endmacro %}

{% macro timeago(timestamp) %}
<time class="timeago" datetime="{{ timestamp }}">{{ timestamp }}</time>
{% endmacro %}