Added Codacy info

Added Codacy info

Author: cog

README.md

@@ -30,3 +30,23 @@ and everything is well explained in our Docs section.
 ## Test
 
 Follow the instructions at [codacy-plugins-test](https://github.com/codacy/codacy-plugins-test/blob/master/README.md#test-definition)
+
+## What is Codacy?
+
+[Codacy](https://www.codacy.com/) is an Automated Code Review Tool that monitors your technical debt, helps you improve your code quality, teaches best practices to your developers, and helps you save time in Code Reviews.
+
+### Among Codacy’s features:
+
+ - Identify new Static Analysis issues
+ - Commit and Pull Request Analysis with GitHub, BitBucket/Stash, GitLab (and also direct git repositories)
+ - Auto-comments on Commits and Pull Requests
+ - Integrations with Slack, HipChat, Jira, YouTrack
+ - Track issues in Code Style, Security, Error Proneness, Performance, Unused Code and other categories
+
+Codacy also helps keep track of Code Coverage, Code Duplication, and Code Complexity.
+
+Codacy supports PHP, Python, Ruby, Java, JavaScript, and Scala, among others.
+
+### Free for Open Source
+
+Codacy is free for Open Source projects.