Add dogpile dependency and configuration to nuancier

roles/nuancier/tasks/main.yml

@@ -13,6 +13,7 @@
   - python-psycopg2
   - python-openid-cla
   - python-openid-teams
+  - python-memcached
   tags:
   - packages
 

roles/nuancier/templates/nuancier-lite.cfg

@@ -43,4 +43,12 @@ CACHE_FOLDER = os.path.join(STATIC_FOLDER, 'cache')
 ### length or width of the picture fit the length and width specified below.
 THUMB_SIZE = (256, 256)
 
+# This is required to fix login in stg
 PREFERRED_URL_SCHEME='https'
+
+# dogpile.cache configuration to work with memcached
+NUANCIER_CACHE_BACKEND = 'dogpile.cache.memcached'
+NUANCIER_CACHE_KWARGS = {'arguments' : {
+        'url': "127.0.0.1:11211",
+    }
+}