ruflin/Elastica — pull request #573 by xyu (2014-03-20 18:25:31+00:00)
Title: Allow for request params in delete by query calls

Howdy,

Delete by query calls allows for [optional request params](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-delete-by-query.html#delete-by-query-parameters) to tune things like routing, replication and consistency. This adds the ability to use them with Elastica.