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

Add a Codacy badge to README.md

Author: marabesi

README.md

@@ -1,5 +1,7 @@
 # arduino-php-wrapper
 
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/3d57a79cbf3245e0af61e9123fda26eb)](https://www.codacy.com/app/matheus-marabesi/arduino-php-wrapper?utm_source=github.com&utm_medium=referral&utm_content=marabesi/arduino-php-wrapper&utm_campaign=badger)
+
 If you are wondering how to control the Arduino serial port via PHP, here is the solution. 
 The **arduino://** wrapper is a easy and straightforward way to write and read data from Arduino.