Update README.md with Clean Code link (#80)

Author: david-cho-lerat-sonarsource

README.md

@@ -1,12 +1,14 @@
 Sonar Custom Rules Examples [![Build Status](https://travis-ci.org/SonarSource/sonar-custom-rules-examples.svg?branch=master)](https://travis-ci.org/SonarSource/sonar-custom-rules-examples)
 ==========
 
-This repository contains project examples you can directly clone to bootstrap your own project to write custom rules for COBOL, PHP, Python and RPG.
+This repository contains project examples you can directly clone to bootstrap your own project to write custom rules for COBOL, PHP, Python, and RPG.
 
 Related documentation is there: https://docs.sonarqube.org/latest/extend/adding-coding-rules/
 
-Have question or feedback?
---------------------------
+Sonar's [Clean Code solutions](https://www.sonarsource.com/solutions/clean-code/?utm_medium=referral&utm_source=github&utm_campaign=clean-code&utm_content=sonar-custom-rules-examples) help developers deliver high-quality, efficient code standards that benefit the entire team or organization.
+
+Have questions or feedback?
+---------------------------
 
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