Add redirect on registration completed.

app/templates/registration/registration_complete.html

@@ -1,6 +1,7 @@
 {% extends "registration/registration_base.html" %}
 {% block title %}Activation email sent{% endblock %}
 {% block content %}
+<meta http-equiv="refresh" content="5; url=/">
 <p>An activation email has been sent.  Please check your email and click on the link to activate your account.</p>
 {% endblock %}