Whole heap of registration and error template changes

templates/400.html

@@ -0,0 +1,9 @@
+{% extends 'base.html' %}
+{% load staticfiles %}
+{% block title %}Bad Request{% endblock %}
+
+{% block content %}
+    <div class="text-center">
+        <img src="{% static 'imgs/400.jpg' %}"/>
+    </div>
+{% endblock %}