Support CRUD + Charge for tokenised credit cards

[Zensavona]

Basic quick + dirty support for creating, reading, updating, deleting and charging tokenised credit cards

Tests included + updated.

Note: I had to break your API for bill_to slightly to add extra fields because you didn't include postcode or state which are required here.

[speeddragon]

Hi @Zensavona, this looks good. I have started in a different branch to provide tokenization for credit cards, but never end up finishing it.

[Zensavona]

@speeddragon great - I'll just get those tests to pass on travis (works locally - I guess it's not using the saved VCR cassettes for some reason?)

[Zensavona]

Hi @Zensavona, this looks good. I have started in a different branch to provide tokenization for credit cards, but never end up finishing it.

P.S. that's actually an entirely different service - TMS !== On-Demand Billing

[speeddragon]

You're right. Looking better into the PR, maybe it could be better to move these methods into a new module, like CyberSourceSDK.RecurringSubscription ? I think this is growing beyond what was initial thought, so some new structure might be helpful for further improvements of this module.

[andreragsilva]

@speeddragon should we take a look into the PR or do you prefer to handle it?

[speeddragon]

This PR needs a refactor since the Client module is getting huge, as mentioned in my last comment.

[andreragsilva]

@Zensavona can you evaluate the refactor suggestion made by @speeddragon and implement it?

[Zensavona]

@rageofflames / @speeddragon since the Client module is getting huge, is it a problem from your guys' perspective to break the existing API and split it up? That's the reason I left it this way.

Just let me know about that and I'll get to it when I have a spare couple hours.

[speeddragon]

We definitely should break it. If I have some time I will try to improve it also.