feat(README): add contact and resources section

Add contact and resources section with links to raft-dev, Ben's slides
and the raft consensus homepage

README.md

@@ -41,6 +41,20 @@ These projects are built on go-raft:
 
 If you have a project that you're using go-raft in, please add it to this README so others can see implementation examples.
 
+## Contact and Resources
+
+- [raft-dev][raft-dev] is a mailing list for discussion about best practices
+  and implementation of Raft. Not goraft specific but helpful if you have
+  questions.
+- [Slides from Ben's talk][bens-talk] which includes easy to understand
+  diagrams of leader election and replication
+- The [Raft Consensus homepage][raft-home] has links to additional raft
+  implementations, slides to talks on Raft and general information
+
+[raft-home]:  http://raftconsensus.github.io/
+[raft-dev]: https://groups.google.com/forum/#!forum/raft-dev
+[bens-talk]: https://speakerdeck.com/benbjohnson/raft-the-understandable-distributed-consensus-protocol
+
 ## The Raft Protocol
 
 This section provides a summary of the Raft protocol from a high level.