Move product thumbnails under the featured image http://take.ms/EOdbc

single-product.liquid

{% comment %}
  Change .item-product-photo from this:
{% endcomment %}

<div class="grid-item medium--four-sixths large--four-sixths push--one-sixth item-product-photo">

{% comment %}
  To that:
{% endcomment %}
  
<div class="grid-item large--four-sixths push--large--one-sixth item-product-photo">

{% comment %}
  Change .item-product-thumbnails from this:
{% endcomment %}

<div class="grid-item medium--one-sixth large--one-sixth push--one-sixth item-product-thumbnails">

{% comment %}
  To that:
{% endcomment %}

<div class="grid-item large--four-sixths push--large--one-sixth item-product-thumbnails">

timber.scss

{% comment %}
  Add the following at the bottom of the file.
{% endcomment %}

.product-photo-thumbs li {
  display: inline-block;
  margin: 10px;
}