Merge pull request #848 from JustinaPetr/add-forum

Add Rasa Community Forum links to README.md

README.md

@@ -1,5 +1,5 @@
 # Rasa Core
-[![Join the chat on Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/RasaHQ/rasa_core?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Join the chat on Rasa Community Forum](https://img.shields.io/badge/forum-join%20discussions-brightgreen.svg)](https://forum.rasa.com/?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Build Status](https://travis-ci.com/RasaHQ/rasa_core.svg?branch=master)](https://travis-ci.com/RasaHQ/rasa_core)
 [![Coverage Status](https://coveralls.io/repos/github/RasaHQ/rasa_core/badge.svg?branch=master)](https://coveralls.io/github/RasaHQ/rasa_core?branch=master)
 [![PyPI version](https://img.shields.io/pypi/v/rasa_core.svg)](https://pypi.python.org/pypi/rasa-core)
@@ -12,7 +12,7 @@
 
 - **I'm ready to install Rasa Core! 🚀** [Installation](https://core.rasa.com/installation.html)
 
-- **I have a question ❓** [Gitter channel](https://gitter.im/RasaHQ/rasa_core)
+- **I have a question ❓** [Rasa Community Forum](https://forum.rasa.com)
 
 - **I would like to contribute 🤗** [How to contribute](#how-to-contribute)
 
@@ -41,7 +41,7 @@ There is extensive documentation:
 - [stable](https://core.rasa.com/)   (if you install from **pypi**)
 
 
-Please use [gitter](https://gitter.im/RasaHQ/rasa_core) for quick answers to 
+Please use [Rasa Community Forum](https://forum.rasa.com) for quick answers to 
 questions.