recurly/recurly-client-php — pull request #19 by qqqq (2011-11-11 20:06:28+00:00)
Title: Allow updating a subscription's addons

The helper class to create subscription add-ons was missing.

This patch enables creating/updating subscription with add-ons:

```php
$recSub = new Recurly_Subscription();
$recSub->account_code = '123';
$recSub->plan_code = 'myplan';
$recSub->currency = 'USD';
$addon = new Recurly_SubscriptionAddOn();
$addon->add_on_code = 'MY_ADDON';
$addon->quantity = 3;
$recSub->subscription_add_ons = array($addon);
$recSub->create();
```

See support req #5699.