add javadoc link to readme

Author: vmarchaud

README.md

@@ -5,6 +5,8 @@ Pokemon GO Java API
 [![Build Status](https://travis-ci.org/Grover-c13/PokeGOAPI-Java.svg?branch=master)](https://travis-ci.org/Grover-c13/PokeGOAPI-Java)
 [![](https://jitpack.io/v/Grover-c13/PokeGOAPI-Java.svg)](https://jitpack.io/#Grover-c13/PokeGOAPI-Java)
 
+Javadocs : [CLICK ME](https://jitpack.io/com/github/Grover-c13/PokeGOAPI-Java/a2828da60d/javadoc/) 
+
 See this guide for adding functionality:
    https://docs.google.com/document/d/1BE8O6Z19sQ54T5T7QauXgA11GbL6D9vx9AAMCM5KlRA