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 'layouts/default.html' %}

{% block content %}
<h1>Publish {{site_title}}</h1>

{% for target in targets %}
<div>
    <h3>{{target.name}}</h3>
    {% if target.description %}<div>{{target.description}}</div>{% endif %}
    <form action="{{url_run}}" method="POST">
        <input type="hidden" name="target" value="{{target.name}}" />
        <button type="submit" class="btn btn-default">Execute</button>
    </form>
</div>
{% endfor %}

{% endblock %}