update README.md (#2835)

* update README.md [https://github.com/twitter/heron/issues/2664]

* update README.md further [https://github.com/twitter/heron/issues/2664]

* update travis link; add meetup group; [https://github.com/apache/incubator-heron/issues/2834]
diff --git a/README.md b/README.md
index 2f27ed9..3e21c5e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/twitter/heron.svg?&branch=master)](https://travis-ci.org/twitter/heron)
+[![Build Status](https://travis-ci.org/apache/incubator-heron.svg?&branch=master)](https://travis-ci.org/apache/incubator-heron)
 
 ![logo](website/static/img/HeronTextLogo.png)
 
@@ -40,6 +40,9 @@
 
 You can self-register at http://heronstreaming.herokuapp.com/
 
+#### Meetup Group
+https://www.meetup.com/Apache-Heron-Bay-Area
+
 
 ## For more information: