Merge pull request #1 from codacy-badger/codacy-badge

Add a Codacy badge to readme.md

Author: accgit

readme.md

@@ -1,4 +1,7 @@
 ## Dropdown menu
+
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/af9f8682404e4b9e8e20143c2a666cc6)](https://www.codacy.com/app/accgit/dropdown-menu?utm_source=github.com&utm_medium=referral&utm_content=css-ui/dropdown-menu&utm_campaign=badger)
+
 
 Simple dropdown menu, based on CSS UI.