new file 100644
{% load thumbnail %}
{% spaceless %}
<a href="{{ sponsor.external_url }}">
{% if dimensions %}
<img id="sponsor_{{ sponsor.pk }}" src="{% thumbnail sponsor.logo dimensions %}" alt="{{ sponsor.name }}" />
{% else %}
<img id="sponsor_{{ sponsor.pk }}" src="{% thumbnail sponsor.logo '150x150' %}" alt="{{ sponsor.name }}" />
{% endif %}
</a>
{% endspaceless %}