more acceptCustomer documentation in github

[rib2023]

The sample app for authorize.net has many great examples for acceptHosted transactions, but there are no examples in the acceptCustomer markdown: https://github.com/AuthorizeNet/accept-sample-app/blob/master/README-AcceptCustomer.md

It would be great if we could get some examples of the acceptCustomer setup for the CommunicationHandler function for integrating the acceptCustomer iFrame into a web page.  Your documentation suggests that the hosted form listener script should return the ideal height/width of the window, changesSaved, and requestCanceled parameters, but I can only get it to return window parameters: 

https://community.developer.cybersource.com/t5/Integration-and-Testing/Accept-Customer-iFrameCommuni...

this problem came up for another user, and I don't think it was resolved:

 https://community.developer.cybersource.com/t5/Integration-and-Testing/hostedProfileIFrameCommunicat...