README.md in embulk-input-elasticsearch-0.2.0 vs README.md in embulk-input-elasticsearch-0.2.1

@@ -1,6 +1,6 @@
-# Elasticsearch input plugin for Embulk
+# Elasticsearch input plugin for Embulk [![Build Status](https://secure.travis-ci.org/toyama0919/embulk-input-elasticsearch.png?branch=master)](http://travis-ci.org/toyama0919/embulk-input-elasticsearch)
 
 ## Overview
 
 * **Plugin type**: input
 * **Resume supported**: yes
@@ -15,10 +15,11 @@
 - **index**: index (string, required)
 - **index_type**: index_type (string)
 - **request_timeout**: request_timeout (integer)
 - **per_size**: per_size (integer, required, default: `1000`)
 - **limit_size**: limit_size (integer, default: unlimit)
+- **num_threads**: number of threads for queries. (integer, default: 1)
 - **fields**: fields (array, required)
   - **name**: name (string, required)
   - **type**: type (string, required)
   - **metadata**: metadata (boolean, default: false)
   - **time_format**: time_format (string, required)
@@ -36,9 +37,10 @@
   index: crawl
   index_type: m_corporation_page
   request_timeout: 60
   per_size: 1000
   limit_size: 200000
+  num_threads: 2
   fields:
     - { name: _id, type: string, metadata: true }
     - { name: _type, type: string, metadata: true }
     - { name: _index, type: string, metadata: true }
     - { name: _score, type: double, metadata: true }