Update README.md

SergeyKanzhelev · web-flow · commit 19a0715a3ef9 · 2019-05-10T12:13:39.000-07:00
diff --git a/README.md b/README.md
@@ -1 +1,4 @@
-# opentelemetry-python
+# opentelemetry-python
+
+
+[![Join the chat at Python SIG gitter](https://badges.gitter.im/open-telemetry/opentelemetry-python.svg)](https://gitter.im/open-telemetry/opentelemetry-python?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
