added play store link

README.md

@@ -1,6 +1,7 @@
 ![Android MP3 Player](app/src/main/res/mipmap-hdpi/headphone_icon_foreground.png) 
 # Android Music Player
-[![Build Status](https://travis-ci.org/goldy1992/Mp3Player.svg?branch=master)](https://travis-ci.org/goldy1992/Mp3Player) [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=goldy1992_Mp3Player&metric=alert_status)](https://sonarcloud.io/dashboard?id=goldy1992_Mp3Player)
+## [![Build Status](https://travis-ci.org/goldy1992/Mp3Player.svg?branch=master)](https://travis-ci.org/goldy1992/Mp3Player) [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=goldy1992_Mp3Player&metric=alert_status)](https://sonarcloud.io/dashboard?id=goldy1992_Mp3Player)
+### [![Get it on Google Play](img/play-store-badge.png)](https://play.google.com/store/apps/details?id=com.github.goldy1992.mp3player.full)
 ---
 Supported Versions `>= Android Marshmallow`
 An open source MP3 Player for Android, developed using the design principles in [Google's Android Audio App](https://developer.android.com/guide/topics/media-apps/audio-app/building-an-audio-app) tutorial.