Upgrade to ES v2?

[nickcodefresh]

Any chance this can be updated to work with ES v2?

Thanks

[sauravbiswasiupr]

+1 for raising the issue @nickcodefresh. @tlrx do you accept PRs now ? there are some old ES java utlities you use in your code, because of which V2.0 is not supported.For example: org.elasticsearch.common.Preconditions which you could easily replace with the one from Guava.

Or do you suggest that we fork the repo and then proceed ?

Also wi