aparo/pyes — pull request #425 by julianhille (2014-07-08 22:17:20+00:00)
Title: Added ReverseNestedAgg (which where missing).

Added test for NestedAgg and ReverseNestedAgg

http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-aggregations-bucket-reverse-nested-aggregation.html#search-aggregations-bucket-reverse-nested-aggregation