django-settings.py

APPNAME = 'foobar'

# Overwrite settings depending on environment
# include at end of settings.py to overwrite settings in a per environment way
ENVIRONMENT_NAME = os.environ.get('ENVIRONMENT_NAME', 'production')

extra_settings = 'settings-%s.py' % ENVIRONMENT_NAME
extra_settings_path = os.path.join(BASE_DIR, APPNAME, extra_settings)
if os.path.exists(extra_settings_path):
    print 'Try to load extra settings: %s' % extra_settings
    execfile(extra_settings_path, globals())

urls.py

# urls.py for Django 1.8
from django.conf.urls import include, url
from django.contrib import admin

urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
]

admin.site.site_header = 'Admin title'