Cleanup common sections in README

README.md

@@ -22,14 +22,15 @@ See [DESIGN.md](DESIGN.md) for an overview of features and future goals.
 The library is used as a part of our WebRTC implementation. Please refer to that [roadmap](https://github.com/pion/webrtc/issues/9) to track our major milestones.
 
 ### Community
-Pion has an active community on the [Golang Slack](https://invite.slack.golangbridge.org/). Sign up and join the **#pion** channel for discussions and support. You can also use [Pion mailing list](https://groups.google.com/forum/#!forum/pion).
+Pion has an active community on the [Slack](https://pion.ly/slack).
 
-We are always looking to support **your projects**. Please reach out if you have something to build!
+Follow the [Pion Twitter](https://twitter.com/_pion) for project updates and important WebRTC news.
 
+We are always looking to support **your projects**. Please reach out if you have something to build!
 If you need commercial support or don't want to use public methods you can contact us at [team@pion.ly](mailto:team@pion.ly)
 
 ### Contributing
-Check out the **[contributing wiki](https://github.com/pion/webrtc/wiki/Contributing)** to join the group of amazing people making this project possible:
+Check out the **[contributing wiki](https://github.com/pion/webrtc/wiki/Contributing)** to join the group of amazing people making this project possible: [AUTHORS.txt](./AUTHORS.txt)
 
 ### License
 MIT License - see [LICENSE](LICENSE) for full text