Add captcha to registration form

sith/urls.py

@@ -72,6 +72,7 @@ urlpatterns = [
     url(r'^ajax_select/', include(ajax_select_urls)),
     url(r'^i18n/', include('django.conf.urls.i18n')),
     url(r'^jsi18n/$', javascript_catalog, js_info_dict, name='javascript-catalog'),
+    url(r'^captcha/', include('captcha.urls')),
 ]
 
 if settings.DEBUG: