Update URL of "How to Contribute to an Open Source Project on GitHub" link. The old one send the user to a 404 page where egghead suggest the new and correct URL. So, this change send the user direct to the correct URL.
* Added .github/ISSUE_TEMPLATE.md (optional) * Added CONTRIBUTING.md (optional) * Added backers and sponsors on the README * Added call to donate after npm install (optional) * Update README.md