Additional rel fixes and cache homepage slider
Temp commit
First working version back to upstream django-cms (earliest django-cms git with new i18n)
Working upgrade to latest django 2.4 develop branch.  Upgrade is non-trivial, make sure to read and follow docs/django_cms_2_4_migration_howto.txt BEFORE you run app_update
Upgrade to latest django-cms 2.4 snapshot
Doc update
Django-cms 2.4.1, Django 1.4.5, django-reversion 1.6.6
Merge branch 'hotfix/djangocms_2_4_upgrade' into develop