Example Java8 method reference usage

Hi Decebal,

This is some example code which works with stock Pippo if you are running Java 8 and demonstrates what I meant.  The commented out approach would be ideal, I think.  I know you want to stay on a Java 7 base, but consider the ramp-up time for a web framework to gain traction and then consider that Oracle ends support for Java 7 within the next 6-12 months.  JRE8 is now the default runtime on java.com.  Long-term it might make more sense to adopt J8 as a base.  Just my thoughts.  :smile: 

This is just a throw-away PR, not for merging.

http://baddotrobot.com/blog/2014/02/18/method-references-in-java8/