native.document.[create, put] should support versioning

[richievos]

Related to #54 another issue we're running into is elastisch doesn't seem to support using the optimistic locking built into elasticsearch. Specifically, on the index-request, one should be able to trigger a setVersion call.

Docs on setVersion: https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/action/index/IndexRequestBuilder.java#L281

This should probably just be another when in https://github.com/clojurewerkz/elastisch/blob/master/src/clojurewerkz/elastisch/native/conversion.clj#L148

(when version
  (.version version)    

[richievos]

Workaround for put

;; Put workaround
; Acts like native.document.put, but supports :version. Replace calls to this with es-doc/put when
; https://github.com/clojurewerkz/elastisch/issues/56 is fixed
(defn- put [index-name type document & { :as options }]
  (let [index-request (cnv/->index-request index-name type document options)]
    (if-let [version (:version options)]
      (.version index-request version))

    ; Note: this should really be .actionGet not .get (https://github.com/clojurewerkz/elastisch/issues/54)
    (cnv/index-response->map (.get (es-native/index index-request)))))

[michaelklishin]

@richievos feel free to submit a pull request. This feature is likely newer than Elastisch's native client.