func ReadSetting(db *reform.Querier, key string) (string, error) {
	var st Setting
	if err := FindByPrimaryKeyTo(db, &st, key); err != nil {
		return "", fmt.Errorf(
			"failed to find '%s' setting: %s", key, err)
	}
	return st.Value, nil
}
func ReadSetting(db *reform.Querier, key string) (string, error) {
	var st Setting
	if err := FindByPrimaryKeyTo(db, &st, key); err != nil {
		return "", fmt.Errorf(
			"failed to find '%s' setting: %s", key, err)
	}
	return st.Value, nil
}
// ReadSetting reads value of a given setting.