core: Continue PieCrust3 refactor, simplify pages. The asset pipeline is still the only function pipeline at this point. * No more `QualifiedPage`, and several other pieces of code deleted. * Data providers are simpler and more focused. For instance, the page iterator doesn't try to support other types of items. * Route parameters are proper known source metadata to remove the confusion between the two. * Make the baker and pipeline more correctly manage records and record histories. * Add support for record collapsing and deleting stale outputs in the asset pipeline.

{% extends "default.html" %}

{% block content %}
<div class="container">
    <section class="col-md-8">
    {{ content|safe }}
    </section>
    <aside class="col-md-4">
        {% include 'inc/family-sidebar.html' %}
    </aside>
</div>
{% endblock %}