Update README.md

Author: fhueske

README.md

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-# Java Examples for Stream Processing with Apache Flink
+## Java Examples for Stream Processing with Apache Flink
+
+This repository hosts Java code examples for ["Stream Processing with Apache Flink"](http://shop.oreilly.com/product/0636920057321.do) by [Fabian Hueske](https://twitter.com/fhueske) and [Vasia Kalavri](https://twitter.com/vkalavri).
+
+**Note:** The Java examples are not comlete yet. <br>
+The [Scala examples](https://github.com/streaming-with-flink/examples-scala) are complete and we are working on translating them to Java.
+
+<a href="http://shop.oreilly.com/product/0636920057321.do">
+  <img width="240" src="https://covers.oreillystatic.com/images/0636920057321/cat.gif">
+</a>