Merge pull request #169 from knuxus/patch-1

Update readme with license and contribute part

Author: despo

README.md

@@ -1 +1,9 @@
 View the tutorials [here](http://codebar.github.io/tutorials)
+
+## Contributing
+
+We encourage you to contribute with your suggestions and corrections, head to our [issues page](https://github.com/codebar/tutorials/issues) and open a new issue or help on the existing ones.
+
+## License
+
+Codebar Tutorials is released under the [Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)](http://creativecommons.org/licenses/by-nc-sa/4.0/).