public static function getByClave($clave)
{
$sql = 'select * from configuracion where clave = :clave';
$query = self::nuevaDb()->prepare($sql);
$query->execute(array(":clave" => $clave));
$arreglo = $query->fetchAll(PDO::FETCH_ASSOC);
$result = Configuracion::inicializar($arreglo[0]);
return $result;
}
