added partial update docs
added partial update docs

martiis/ElasticsearchBundle,saimaz/ElasticsearchBundle,asev/ElasticsearchBundle,trandangtri/ElasticsearchBundle,saimaz/ElasticsearchBundle,trandangtri/ElasticsearchBundle,tautrimas/ElasticsearchBundle,tautrimas/ElasticsearchBundle,murnieza/ElasticsearchBundle,martiis/ElasticsearchBundle,ndinh215/ONGRElasticsearchBundle,asev/ElasticsearchBundle,ongr-io/ElasticsearchBundle,murnieza/ElasticsearchBundle,ndinh215/ONGRElasticsearchBundle