restored the line that restores tupleness to INSTALL_APPS, in case it was important
diff --git a/xos/xos/settings.py b/xos/xos/settings.py
index a55360b..ff586a2 100644
--- a/xos/xos/settings.py
+++ b/xos/xos/settings.py
@@ -164,9 +164,10 @@
 )
 
 if DJANGO_VERSION[1]>=7:
-    # if django >= 1.7, then remove evolution and change the admin module
+    # if django >= 1.7, then change the admin module
     INSTALLED_APPS = list(INSTALLED_APPS)
     INSTALLED_APPS[INSTALLED_APPS.index('django.contrib.admin')] = 'django.contrib.admin.apps.SimpleAdminConfig'
+    INSTALLED_APPS = tuple(INSTALLED_APPS)
 
 # Added for django-suit form 
 TEMPLATE_CONTEXT_PROCESSORS = TCP + (