aparo/pyes — pull request #251 by craigbeck (2013-01-25 23:15:36+00:00)
Title: fix facet_filter serialization

Facet filters were being seialized as 'filter' when they should be serialized as 'facet_filter'

see: http://www.elasticsearch.org/guide/reference/api/search/facets/ (Facet Filter)