added link to github and welcome chat, resolving...

added link to github and welcome chat, resolving https://github.com/valueflows/valueflows/issues/254

docs/README.md

@@ -11,3 +11,4 @@ One of the purposes of this vocab is to support resource flows connecting many w
 
 We want to support RDF based and non-RDF based use of the vocabulary, basically any way that people want to use software and data on the internet to help create economic networks.
 
+You can find us [here on github](https://github.com/valueflows).  Or come on over and ask questions in the [Welcome Chat](https://gitter.im/valueflows/welcome).