During Geocoding if Google returns an error it triggers a PHP errorq

If you attempt to use the cron script to geocode 1/2 million contacts Google will notice. It will return an error something along the lines of "This API key has been temporarily suspended". This string throws a PHP error when we attempt to parse it with simplexml_load_string(). The attatched patch fixes this and adds a bit of throttling to UpdateAddress.php to attempt to avoid the error.