Sorts signs in case-insensitive order.

Sorts signs in case-insensitive order.

_includes/signatures.html

@@ -6,11 +6,11 @@
     |{{signature.name | escape }}#{{signature.link | escape }}
   {% endfor %}
 {% endcapture %}
-{% assign sorted_signs = signs | split: '|' | sort %}
+{% assign sorted_signs = signs | split: '|' | sort_natural %}
 {% for signature in sorted_signs %}
   {% assign sign_items = signature | split: '#' %}
   {% if sign_items[0] and sign_items[1] %} 
   <li><a href="{{ sign_items[1] | strip }}">{{ sign_items[0] | strip }}</a></li>
   {% endif %} 
 {% endfor %}
-</ol>
+</ol>