Log Message:
Changes 2.4.1:
* USE_I18N=False fixed
* some frontend css stuff fixed
* check_copy_relations fixed for abstract classes
* non public frontend languages fixed

Changes 2.4.0:
* Compatibility with Django 1.4 and 1.5 (1.3 support dropped)
* Support for Python 2.5 dropped
* CMS_MAX_PAGE_PUBLISH_REVERSIONS has been added
* Reversion integration has changed to limit DB size
* CMS_LANGUAGE setting has changed
* CMS_HIDE_UNTRANSLATED setting removed
* CMS_LANGUAGE_FALLBACK setting removed
* CMS_LANGUAGE_CONF setting removed
* CMS_SITE_LANGUAGES setting removed
* CMS_FRONTEND_LANGUAGES setting removed
* MultilingualMiddleware has been removed
* CMS_FLAT_URLS has been removed
* CMS_MODERATOR has been removed and replaced with simple publisher.
* PlaceholderAdmin has now language tabs and has support for django-hvad
* Added `cms.middleware.language.LanguageCookieMiddleware`
* Added CMS_RAW_ID_USERS