Read sandbox cache settings from CACHE_URL

This allows the latest.oscarcommerce.com to run with memcache

.dockerignore

 __pycache__
 *.pyc
 node_modules/
+sandbox/public/

requirements.txt

 #
 # $ for x in `yolk -l | awk '{print $1}'`; do yolk -d $x 2>/dev/null; done
 # Development
+django-environ==0.4.1
 django-debug-toolbar==1.6
 django-extensions==1.7.6
+python-memcached==1.58
 Werkzeug==0.11.15
 
 # Sandbox

sandbox/settings.py

 import os
-
+import environ
 import oscar
 
+env = environ.Env()
+
 # Path helper
 location = lambda x: os.path.join(
     os.path.dirname(os.path.realpath(__file__)), x)
 
-DEBUG = os.environ.get('DEBUG', 'true') != 'false'
+DEBUG = env.bool('DEBUG', default=True)
 SQL_DEBUG = DEBUG
 
 ALLOWED_HOSTS = [
 }
 
 CACHES = {
-    'default': {
-        'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
-    }
+    'default': env.cache(default='locmemcache://'),
 }
 
+
 # Local time zone for this installation. Choices can be found here:
 # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
 # although not all choices may be available on all operating systems.
 # Sentry
 # ======
 
-if os.environ.get('SENTRY_DSN'):
-    RAVEN_CONFIG = {'dsn': os.environ.get('SENTRY_DSN')}
+if env('SENTRY_DSN', default=None):
+    RAVEN_CONFIG = {'dsn': env('SENTRY_DSN', default=None)}
     LOGGING['handlers']['sentry'] = {
         'level': 'ERROR',
         'class': 'raven.contrib.django.raven_compat.handlers.SentryHandler',