Remove subcategory join on user (#213)

    'reviewer'.in? self.roles_in(conference)

  end

  def subcategories_assigned_to_in(conference)

    Subcategory.joins(:conference_user_subcategories => :conference_user).where('conference_users.user_id' => self.id, 'conference_users.conference_id' => conference.id)

    #self.conference_users.includes(:conference_user_subcategories).where('conference_users.conference_id' => conference.id)

  end

  def self.check_pentabarf_credentials(email, password)

    user = User.find_by_email(email)

    return unless user and user.pentabarf_password and user.pentabarf_salt