Adding Codacy Badge

Author: SrinivasanTarget

README.md

@@ -2,6 +2,7 @@
 
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.appium/java-client/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.appium/java-client)
 [![Javadoc](https://javadoc-emblem.rhcloud.com/doc/io.appium/java-client/badge.svg)](http://www.javadoc.io/doc/io.appium/java-client)
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/f365c5e9458b42bf8a5b1d928d7e4f48)](https://www.codacy.com/app/appium/java-client)
 
 This is the Java language binding for writing Appium Tests, conforms to [Mobile JSON Wire Protocol](https://github.com/SeleniumHQ/mobile-spec/blob/master/spec-draft.md)