docs: add contrib section (#26)

* docs: add contrib section

* docs: fix wording

* docs: update link, on hold to clarify CLA

* docs: add CONTRIBUTING.md

* docs: remove redundant prep

Author: Desislava Mihaylova

CONTRIBUTING.md

@@ -0,0 +1,30 @@
+# Guidelines to Contribution
+
+> This package is distributed under a permissive [Apache License](https://github.com/telerik/kendo-intl/blob/develop/LICENSE.md).
+
+We accept third-party contributions.
+
+## Ways to Contribute
+
+You can contribute by:
+
+* Submitting bug-fixes.
+* Proposing changes in documentation or updates to existing code.
+* Adding features or missing functionalities.  
+
+## Steps to Contribute
+
+To submit your suggestions:
+
+1. If a first-time contributor, read and sign the [Kendo UI Contribution License Agreement (CLA)](goo.gl/forms/dXc1RaE8le6rVZ0h1). The Agreement confirms that you acknowledge the legal aspects of your contributions.
+1. Branch out the repo you want to update.
+1. Add your contribution.
+1. Submit a [Pull Request](https://help.github.com/articles/creating-a-pull-request/).
+
+## Support-Related Issues
+
+Refer to our [**Community & Support**](http://www.telerik.com/kendo-angular-ui/support/) page for more information on:
+
+* How to report a bug
+* New upcoming features  
+* Support-related questions