Support for jdk8

This issue will bring the jdk8 enhancement to the kernel API.
Reactive , Streams , etc.

http://www.techempower.com/blog/2013/03/26/everything-about-java-8/
https://speakerdeck.com/simonbasle/rxjava-plus-java-8-sortir-de-lenfer-des-callbacks
http://javaslang.com
https://dineshramitc.wordpress.com/2015/09/22/video-java-8-dos-and-donts/
