Implement GeoHash Filter

[Mpdreamz]

http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-geohash-cell-filter.html

[robertlyson]

Hello,

is this issue still to implement?
If so, I can do this.

Thanks.

[gmarz]

@robertlyson This hasn't been implemented yet, so a PR for this would be very much welcomed. 👍