Multiple cache.delete() replaced by cache.delete_many().
Multiple cache.delete() replaced by cache.delete_many().

RamezIssac/django-sitetree,RamezIssac/django-sitetree,PukeCloud/django-sitetree,idlesign/django-sitetree,ikresoft/django-sitetree,caktus/django-sitetree,caktus/django-sitetree,ikresoft/django-sitetree,PukeCloud/django-sitetree,idlesign/django-sitetree