Introducing version badge (#118)

Author: aliabbasrizvi

README.md

@@ -1,7 +1,8 @@
 # Optimizely Python SDK
+[![PyPI version](https://badge.fury.io/py/optimizely-sdk.svg)](https://pypi.org/project/optimizely-sdk)
 [![Build Status](https://travis-ci.org/optimizely/python-sdk.svg?branch=master)](https://travis-ci.org/optimizely/python-sdk)
 [![Coverage Status](https://coveralls.io/repos/github/optimizely/python-sdk/badge.svg)](https://coveralls.io/github/optimizely/python-sdk)
-[![Apache 2.0](https://img.shields.io/github/license/nebula-plugins/gradle-extra-configurations-plugin.svg)](http://www.apache.org/licenses/LICENSE-2.0)
+[![Apache 2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](http://www.apache.org/licenses/LICENSE-2.0)
 
 This repository houses the Python SDK for Optimizely Full Stack.