old_contents: from django.conf.urls import patterns, url
  
  urlpatterns = patterns(
      '',
      url(r'^$', 'simpleoncall.api.views.index', name='index'),
  )
  
new_contents: from django.conf.urls import patterns, url
  
  urlpatterns = patterns(
      '',
      url(r'^$', 'simpleoncall.api.views.index', name='api-index'),
  )
  
subject: fix api url name