Update Readme with opencollective

This commit will update the readme

README.md

@@ -255,6 +255,31 @@ Further reading:
 
 - [OSSEC Documentation](http://www.ossec.net/docs/index.html)
 
+## Contributors
+
+This project exists thanks to all the people who contribute.
+<img src="https://opencollective.com/sous-chefs/contributors.svg?width=890&button=false" /></a>
+
+
+### Backers
+
+Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/sous-chefs#backer)]
+<a href="https://opencollective.com/sous-chefs#backers" target="_blank"><img src="https://opencollective.com/sous-chefs/backers.svg?width=890"></a>
+
+### Sponsors
+
+Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/sous-chefs#sponsor)]
+<a href="https://opencollective.com/sous-chefs/sponsor/0/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/0/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/1/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/1/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/2/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/2/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/3/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/3/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/4/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/4/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/5/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/5/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/6/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/6/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/7/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/7/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/8/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/8/avatar.svg"></a>
+<a href="https://opencollective.com/sous-chefs/sponsor/9/website" target="_blank"><img src="https://opencollective.com/sous-chefs/sponsor/9/avatar.svg"></a>
+
 ## License and Author
 
 Copyright 2010-2017, Chef Software, Inc ([legal@chef.io](mailto:legal@chef.io))