README.md in middleman-tansu-0.0.3 vs README.md in middleman-tansu-0.0.4

@@ -1,30 +1,52 @@
 # Middleman::Tansu
 
 [![Gem Version](https://badge.fury.io/rb/middleman-tansu.svg)](http://badge.fury.io/rb/middleman-tansu)
 [![Build Status](https://travis-ci.org/yterajima/middleman-tansu.svg?branch=develop)](https://travis-ci.org/yterajima/middleman-tansu)
 
-TODO: Write a gem description
+A template of Middleman to manage Markdown files efficiently. 
 
 ## Installation
 
-Add this line to your application's Gemfile:
-
 ```ruby
 gem 'middleman-tansu'
 ```
 
 And then execute:
 
-    $ bundle
+```
+$ bundle
+ # or
+$ bundle install --path vendor/bundle # better way
+```
 
 Or install it yourself as:
 
-    $ gem install middleman-tansu
+```
+$ gem install middleman-tansu
+```
 
 ## Usage
 
-TODO: Write usage instructions here
+middleman-tansu is a template of Middleman. This template contain some extensions. 
+
+```
+$ middleman init PROJECT --template tansu
+```
+
+This template(& extensions) has `tansu` command. You can create Markdown file.
+
+```
+$ bundle exec middleman tansu path/to/page_name
+```
+
+Then `source/path/to/page_name.html.md` that contain Frontmatter was created. Please start server and acces to `http://localhost:4567`
+
+```
+$ bundle exec middleman server
+```
+
+You could see directories and pages just below the `source/templates/index.html.slim`. This index page under EMPTY folders is automatically generated. When `source/templates/index.html.slim` is edited, you can change design and functionality of these index pages.
 
 ## Contributing
 
 1. Fork it ( https://github.com/[my-github-username]/middleman-tansu/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)