new_contents: from django.conf.urls.defaults import patterns, include, url
  from filebrowser.sites import site
  from django.contrib import admin
  admin.autodiscover()
  
  urlpatterns = patterns('',
      url(r'^achievements/', include('achievements.urls', namespace='achievements')),
      url(r'^admin/', include(admin.site.urls)),
      url(r'^admin/filebrowser/', include(site.urls)),
      (r'^admin/jsi18n', 'django.views.i18n.javascript_catalog'),
  )
subject: add admin urls include app urls