old_contents: from django import template
  
  # add core templatetags to builtin so that you don't have to invoke {% load core %} in every template
  template.add_to_builtins('ella.core.templatetags.core')
  # keep this here for backwards compatibility
  template.add_to_builtins('ella.core.templatetags.related')
  # and custom urls
  template.add_to_builtins('ella.core.templatetags.custom_urls_tags')
  # and the same for i18n
  template.add_to_builtins('django.templatetags.i18n')
  
new_contents: from django import template
  
  # add core templatetags to builtin so that you don't have to invoke {% load core %} in every template
  template.add_to_builtins('ella.core.templatetags.core')
  # keep this here for backwards compatibility
  template.add_to_builtins('ella.core.templatetags.related')
  # and custom urls
  template.add_to_builtins('ella.core.templatetags.custom_urls_tags')
  # and the same for i18n
  template.add_to_builtins('django.templatetags.i18n')
  # and photos are always useful
  template.add_to_builtins('ella.photos.templatetags.photos')
  
  
subject: add photos tags to builtins