Merge pull request #58 from apache/UpdateReadme

Update Readme
diff --git a/README.md b/README.md
index d039f36..d8dd5d3 100644
--- a/README.md
+++ b/README.md
@@ -96,10 +96,13 @@
 #### Testing
 See the pom.xml file for test dependencies.
 
-## Resources
+## How to Contact Us
+* We have two ASF [the-ASF.slack.com](http://the-ASF.slack.com) slack channels:
+    * datasketches -- general user questions
+    * datasketches-dev -- similar to our Apache [Developers Mail list](https://lists.apache.org/list.html?dev@datasketches.apache.org), except more interactive, but not as easily searchable.
 
-### [Issues for datasketches-pig](https://github.com/apache/incubator-datasketches-pig/issues)
+* For bugs and performance issues: [Issues for datasketches-pig](https://github.com/apache/incubator-datasketches-pig/issues) 
 
-### [Forum](https://groups.google.com/forum/#!forum/sketches-user)
+* For general questions about using the library please subscribe: [Users Mail List](https://lists.apache.org/list.html?users@datasketches.apache.org)
 
-### [Dev mailing list](dev@datasketches.apache.org)
+* If you are interested in contributing please subscribe: [Developers Mail list](https://lists.apache.org/list.html?dev@datasketches.apache.org)