Readme Updates

[dpdexter]

Thanks for starting this gateway. Is there anyway you can add some documentation on which Cybersource API is used and which credentials are needed? I know that variables are in the source, but its not clear where they come from, etc.

Also, the readme still refers to 2Checkout support for Omnipay.

[eileenmcnaughton]

I think the defaultParameters function declares the keys - so cybersource gives you a secret key etc & you do

$gateway = Omnipay::create('Cybersouce');
$gateway->setSecretKey('abc123');
$gateway->setAccessKey('xyz123');
$gateway->setProfileId('myprofile');

public function getDefaultParameters()
{
return array(
'profileId' => '',
'secretKey' => '',
'accessKey' => '',
'testMode' => false,
);
}