[ic] 3rd Party Tax API

[Mark Johnson]

A quick announcement that we've added a new salestax interface to core 
Interchange available for leveraging 3rd-party tax providers like Tax 
Jar and Avalara.

Summary news article: 
https://www.interchangecommerce.org/i/dev/news?mv_arg=00068

 From the article, you can also find a link to a more detailed blog post 
showing configuration details.

Happy taxing!

Mark