clarify known eslint issues, add to link slack channel for questions

README.md

@@ -6,7 +6,13 @@
 **NOTE:** Please note that this is experimental and may have numerous bugs. It is however
 successfuly linting the [babel core](https://github.com/babel/babel/blob/master/.eslintrc).
 
-If there's an issue, check if it can be reproduced with the regular parser and with the latest versions of `eslint` and `babel-eslint`. For issues related to JSX, see if [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) helps!
+If there is an issue, first check if it can be reproduced with the regular parser and with the latest versions of `eslint` and `babel-eslint`.
+
+For questions and support please visit the `#linting` [babel slack channel](https://babel-slack.herokuapp.com)!
+
+## Known Issues
+> For issues related to JSX (especially `no-unused-vars`), see if [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) helps!
+- `generator-star` with async/await functions [#78](https://github.com/babel/babel-eslint/issues/78)
 
 ## How does it work?