File::increaseGlobalContentVersion

public function increaseGlobalContentVersion()
{
	//todo inc in DB by expression
	$success = $this->update(array(
		'GLOBAL_CONTENT_VERSION' => (int)$this->getGlobalContentVersion() + 1,
	));

	if(!$success)
	{
		return false;
	}

	$this->updateLinksAttributes(array(
		'GLOBAL_CONTENT_VERSION' => $this->getGlobalContentVersion(),
	));

	return $success;
}