Add Gitter chat badge to readme

Update 'Need help?' paragraph to better reflect the unmaintained status of the project

Author: markdalgleish

README.md

@@ -1,4 +1,5 @@
-[![Build Status](https://secure.travis-ci.org/markdalgleish/stellar.js.png)](http://travis-ci.org/markdalgleish/stellar.js)
+[![Build Status](https://img.shields.io/travis/markdalgleish/stellar.js/master.svg?style=flat)](http://travis-ci.org/markdalgleish/stellar.js) [![Gitter](https://img.shields.io/badge/gitter-join%20chat-45cba1.svg?style=flat)](https://gitter.im/markdalgleish/stellar.js)
+
 
 # Stellar.js
 
@@ -291,17 +292,9 @@ Each of the build steps are also available individually.
 
 `$ grunt watch` to continuously lint and test the code while developing.
 
-## Contributing to Stellar.js
-
-Ensure that you successfully test and build the project with `$ grunt` before committing.
-
-Make sure that all plugin changes are made in `src/jquery.stellar.js` (`/jquery.stellar.js` and `/jquery.stellar.min.js` are generated by Grunt).
-
-If you want to contribute in a way that changes the API, please file an issue before submitting a pull request so we can discuss how to appropriately integrate your ideas.
-
-## Questions?
+## Need help?
 
-Contact me on GitHub or Twitter: [@markdalgleish](http://twitter.com/markdalgleish)
+As this project is now unmaintained, your best bet is to try the [Gitter chat room](https://gitter.im/markdalgleish/stellar.js) or [Stack Overflow](http://stackoverflow.com/).
 
 ## License