Numbering the lessons in the schedule

<div class="syllabus">

  <h2 id="schedule">Schedule</h2>

  {% assign lesson_number = 0 %}

  {% assign day = 0 %}

  {% assign multiday = false %}

  {% for episode in site.episodes %}

      {% if multiday %}<td class="col-md-1">{% if episode.start %}Day {{ day }}{% endif %}</td>{% endif %}

      <td class="{% if multiday %}col-md-1{% else %}col-md-2{% endif %}">{% if hours < 10 %}0{% endif %}{{ hours }}:{% if minutes < 10 %}0{% endif %}{{ minutes }}</td>

      <td class="col-md-3">

        <a href="{{ page.root }}{{ episode.url }}">{{ episode.title }}</a>

        {% assign lesson_number = lesson_number | plus: 1 %}

	{{ lesson_number }}. <a href="{{ page.root }}{{ episode.url }}">{{ episode.title }}</a>

      </td>

      <td class="col-md-7">

        {% if episode.break %}