update contributing link
update contributing link

file:a/README.md -> file:b/README.md
# 2048 # 2048
A small clone of [1024](https://play.google.com/store/apps/details?id=com.veewo.a1024), based on [Saming's 2048](saming.fr/p/2048/) (also a clone). A small clone of [1024](https://play.google.com/store/apps/details?id=com.veewo.a1024), based on [Saming's 2048](saming.fr/p/2048/) (also a clone).
   
Made just for fun. [Play it here!](http://gabrielecirulli.github.io/2048/) Made just for fun. [Play it here!](http://gabrielecirulli.github.io/2048/)
   
[![Screenshot](http://pictures.gabrielecirulli.com/2048-20140309-234100.png)](http://pictures.gabrielecirulli.com/2048-20140309-234100.png) [![Screenshot](http://pictures.gabrielecirulli.com/2048-20140309-234100.png)](http://pictures.gabrielecirulli.com/2048-20140309-234100.png)
   
That screenshot is fake by, the way. I never reached 2048 :smile: That screenshot is fake by, the way. I never reached 2048 :smile:
   
## Contributing ## Contributing
Changes and improvements are more than welcome! Feel free to fork and open a pull request. Please make your changes in a specifically made branch and request to pull on `master`! If you can, please make sure the game fully works before sending the PR, as that will help speed up the process. Changes and improvements are more than welcome! Feel free to fork and open a pull request. Please make your changes in a specifically made branch and request to pull on `master`! If you can, please make sure the game fully works before sending the PR, as that will help speed up the process.
   
You can find the same information in the [contributing guide.](https://github.com/gabrielecirulli/2048/blob/master/CONTRIBUTING.txt) You can find the same information in the [contributing guide.](https://github.com/gabrielecirulli/2048/blob/master/CONTRIBUTING.md)
   
## License ## License
2048 is licensed under the [MIT license.](https://github.com/gabrielecirulli/2048/blob/master/LICENSE.txt) 2048 is licensed under the [MIT license.](https://github.com/gabrielecirulli/2048/blob/master/LICENSE.txt)
   
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