Update README.md

Author: augustogoncalves

README.md

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 # Forge PHP SDK
 
+*Forge API*:
+[![oAuth2](https://img.shields.io/badge/oAuth2-v1-green.svg)](http://autodesk-forge.github.io/)
+[![Data-Management](https://img.shields.io/badge/Data%20Management-v1-green.svg)](http://autodesk-forge.github.io/)
+[![OSS](https://img.shields.io/badge/OSS-v2-green.svg)](http://autodesk-forge.github.io/)
+[![Model-Derivative](https://img.shields.io/badge/Model%20Derivative-v2-green.svg)](http://autodesk-forge.github.io/)
+
 ## Overview
 This [PHP](http://php.net/) SDK enables you to easily integrate the Forge REST APIs
 into your application, including [OAuth](https://developer.autodesk.com/en/docs/oauth/v2/overview/),