v0.5.2
  - Add aggregations to multi_search
v0.5.1
  - Add ability to reindex individual attributes of a document using the
  bulk_update API.
v0.5.0
	- Refactor of multisearch and search facade
	- add Search::Results proxy object so pagination and meta data methods can
	be standardize across all responses
  - Searches no longer return a simple array, they now return the
  Search::Results object which proxies array and is enumerable.
v0.4.5
  - Fix issue with hash strings and pagination
v0.4.4
  - Added support for surfacing document _score on query results.