README.md in ngt-0.1.0 vs README.md in ngt-0.1.1

@@ -1,13 +1,19 @@
 # NGT
 
 [NGT](https://github.com/yahoojapan/NGT) - high-speed approximate nearest neighbors - for Ruby
 
+[![Build Status](https://travis-ci.org/ankane/ngt.svg?branch=master)](https://travis-ci.org/ankane/ngt)
+
 ## Installation
 
-First, [install NGT](https://github.com/yahoojapan/NGT/blob/master/README.md#Installation).
+First, [install NGT](https://github.com/yahoojapan/NGT/blob/master/README.md#Installation). For Homebrew, use:
 
+```sh
+brew install ngt
+```
+
 Add this line to your application’s Gemfile:
 
 ```ruby
 gem 'ngt'
 ```
@@ -49,11 +55,11 @@
 ```
 
 Load an index
 
 ```ruby
-Ngt::Index.new(path)
+index = Ngt::Index.new(path)
 ```
 
 Get an object by id
 
 ```ruby
@@ -94,11 +100,10 @@
 query = objects[0]
 result = index.search(query, size: 3)
 
 result.each do |res|
   puts "#{res[:id]}, #{res[:distance]}"
-  object = index.object(res[:id])
-  p object
+  p index.object(res[:id])
 end
 ```
 
 ## Data