New mailing list in readme

Author: Steve Johnson

README.md

@@ -4,9 +4,9 @@ Literally Canvas v0.4.14
 Literally Canvas is an extensible, open source (BSD-licensed), HTML5 drawing
 widget. Its only dependency is [React.js](http://facebook.github.io/react/).
 
-Get help on our mailing list:
-[mailto:literallycanvas@librelist.com](literallycanvas@librelist.com) (just
-send it a message to subscribe)
+Get help on our mailing list by sending an email to
+[literallycanvas+subscribe@googlegroups.com](mailto:literallycanvas+subscribe@googlegroups.com)
+or by visiting [Google Groups](https://groups.google.com/forum/#!forum/literallycanvas).
 
 ### [Full documentation](http://literallycanvas.com)