DOC add Gitter link to readme
@@ -162,6 +162,7 @@ Communication
- Mailing list: https://mail.python.org/mailman/listinfo/scikit-learn
- IRC channel: ``#scikit-learn`` at ``webchat.freenode.net``
+- Gitter: https://gitter.im/scikit-learn/scikit-learn
- Stack Overflow: https://stackoverflow.com/questions/tagged/scikit-learn
- Website: https://scikit-learn.org
