Add Faceting Support

[mohsinh]

faceting option for @ Query which will return Faceted Page

[elvenking]

+1 for this

[mohsinh]

@mkArtak : we will have that soon !

Yup our team is working on it, and you can see initial look at https://github.com/akonczak/spring-data-elasticsearch

And Test case for the facet at Test Case