Official API? #23

I found this repo from the API Helper Libraries page, https://developer.infusionsoft.com/resources/helper-libraries/

But the API client is for the XML-RPC which is deprecated (https://developer.infusionsoft.com/developer-guide/)

I think most devs would expect to find a client for restv1 or restv2, as I did.

I'd suggest clarifying this in the repo name, or in a giant heading at the top of the readme.