Add note about wip sp-api client

README.md

@@ -4,7 +4,7 @@
 [![Maintainability](https://api.codeclimate.com/v1/badges/281e6176048f3c0a1ed3/maintainability)](https://codeclimate.com/github/hakanensari/peddler/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/281e6176048f3c0a1ed3/test_coverage)](https://codeclimate.com/github/hakanensari/peddler/test_coverage)
 
-> :boom: Amazon is migrating to the newly-launched Selling Partner API (SP-API) and is no longer granting new users access to the MWS APIs. I hope to add support in Peddler in due course.
+> :boom: I am currently working on a wrapper for the Selling Partner API (SP-API) [in a branch](https://github.com/hakanensari/peddler/tree/sp-api).
 
 **Peddler** is a Ruby interface to the [Amazon MWS API](https://developer.amazonservices.com/), a collection of web services that help Amazon sellers programmatically exchange data on their listings, orders, payments, reports, and more.
 
@@ -24,7 +24,6 @@ require "peddler"
 
 A client requires the AWS credentials of the application developer. If you are working in a single MWS region, you can set them globally.
 
-
 ```bash
 export AWS_ACCESS_KEY_ID=YOUR_AWS_ACCESS_KEY_ID
 export AWS_SECRET_ACCESS_KEY=YOUR_AWS_SECRET_ACCESS_KEY