Cache rss feeds

[joeljunstrom]

Something like:

before_filter :find_page_template,
                       only: [ :index, :search, :categories, :category, :tagged_with]
caches_action :index,
                           cache_path: Proc.new { [ find_page_template.cache_key, 'rss' ].join('/') },
                           if: proc { request.format.rss? }

def find_page_template
  @page_template ||= PageTemplate.first handle: node.handle
end