Add Simplify Aggregator

Hi,
as promised here is the simplify aggregator using the java port of the simplify.js lib (http://mourner.github.io/simplify-js/).
I've added the dependency to ivy.xml and added the resulting jar as well.
I have to admit that I haven't tested this on 0.9.3, we are running this on our 0.9.2 fork and it works well there.
I'd kindly ask for some testing by someone who has 0.9.3 in use :)
Johannes