Fix facet form scripting

Fix various deprecation warnings

Instead use `for line in fh` since that is less memory intensive

This fixes a DeprecationWarning

Since 1.10 these are properties on the user instead of
methods. The functions are for compat between 1.8+ and 1.10+

Latter one is deprecated

A dict_values object was returned instead of a list. See #2223

You cannot access object attributes directly from inside a blocktrans tag.

Results in too much clutter in Sentry

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

This sets the Content-Length response header which is required for
CloudFront and possible other cdn's

The render_to_string() function doesn't accept an RequestContext
anymore since 1.10

Since there is no demo or us site anymore we can simplify the structure
somewhat by moving the sandbox one directory up

Initial Update