Initial version of ExactTarget data updates by API - creating new subscr...

...iber on ConfirmEmailComplete hook
I think this would be cleaner as just one array declaration, i.e.:
``` php
$aUserParams = [
	'user_id' => $oUser->getId(),
	'user_name' => $oUser->getName(),
	'user_real_name' => $oUser->getRealName(),
...
];
```