Whole heap of registration and error template changes

templates/500.html

@@ -1,6 +1,9 @@
 {% extends 'base.html' %}
+{% load staticfiles %}
 {% block title %}Server error{% endblock %}
 
 {% block content %}
-There was an error while handling your request.
+    <div class="text-center">
+        <img src="{% static 'imgs/500.jpg' %}"/>
+    </div>
 {% endblock %}