def load_hooks
      self.site_hooks = instantiate_subclasses(Octopress::Hooks::Site) || []
      self.page_hooks = instantiate_subclasses(Octopress::Hooks::Page) || []
      self.post_hooks = instantiate_subclasses(Octopress::Hooks::Post) || []
      self.doc_hooks  = instantiate_subclasses(Octopress::Hooks::Document) || []
      self.all_hooks  = instantiate_subclasses(Octopress::Hooks::All) || []
    end
def load_hooks
      self.site_hooks = instantiate_subclasses(Octopress::Hooks::Site) || []
      self.page_hooks = instantiate_subclasses(Octopress::Hooks::Page) || []
      self.post_hooks = instantiate_subclasses(Octopress::Hooks::Post) || []
      self.doc_hooks  = instantiate_subclasses(Octopress::Hooks::Document) || []
      self.all_hooks  = instantiate_subclasses(Octopress::Hooks::All) || []
    end
Instantiates all of the hook plugins. This is basically
 a duplication of the other loaders in Site#setup.