okfn/elasticsearch.js — pull request #12 by kielni (2014-04-09 14:44:32+00:00)
Title: Exists and missing filters

Add support for exists and missing filters

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