Added Gitter link on Readme (#80)

Author: avara1986

README.md

@@ -6,6 +6,8 @@
 [![Requirements Status](https://requires.io/github/python-microservices/pyms/requirements.svg?branch=master)](https://requires.io/github/python-microservices/pyms/requirements/?branch=master)
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/python-microservices/pyms.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/python-microservices/pyms/alerts/)
 [![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/python-microservices/pyms.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/python-microservices/pyms/context:python)
+[![Gitter](https://img.shields.io/gitter/room/DAVFoundation/DAV-Contributors.svg)](https://gitter.im/python-microservices/pyms)
+
 
 PyMS, Python MicroService, is a collections of libraries, best practices and recommended ways to build  microservices with Python.