Added 'state' and 'country' to  the details arrays

This is needed for PaypalStandard payment gateway to work properly.
Consider the foollowing code taken from ``Responsiv\Pay\PaymentTypes\PaypalStandard``:

```
$result['city'] = $customerDetails->city;
        $result['country'] = $customerDetails->country;
        $result['state'] = $customerDetails->state;
        $result['zip'] = $customerDetails->zip;
        $result['night_phone_a'] = $customerDetails->phone;
```
Merge pull request #2 from alxy/patch-2

Added 'state' and 'country' to  the details arrays