README.md in backlog_kit-0.12.1 vs README.md in backlog_kit-0.13.0

@@ -3,10 +3,11 @@
 [![Gem Version](https://badge.fury.io/rb/backlog_kit.svg)](http://badge.fury.io/rb/backlog_kit)
 [![Build Status](https://travis-ci.org/emsk/backlog_kit.svg?branch=master)](https://travis-ci.org/emsk/backlog_kit)
 [![Coverage Status](https://coveralls.io/repos/emsk/backlog_kit/badge.svg?branch=master)](https://coveralls.io/r/emsk/backlog_kit)
 [![Code Climate](https://codeclimate.com/github/emsk/backlog_kit/badges/gpa.svg)](https://codeclimate.com/github/emsk/backlog_kit)
 [![Dependency Status](https://gemnasium.com/emsk/backlog_kit.svg)](https://gemnasium.com/emsk/backlog_kit)
+[![Inline docs](http://inch-ci.org/github/emsk/backlog_kit.svg?branch=master)](http://inch-ci.org/github/emsk/backlog_kit)
 
 Ruby wrapper for the Nulab's Backlog API.
 
 http://developer.nulab-inc.com/docs/backlog
 
@@ -57,11 +58,11 @@
 client.delete('groups/3712') # DELETE
 ```
 
 ## Authentication
 
-### API Key
+### API key
 
 ```ruby
 client = BacklogKit::Client.new(
   space_id: 'emsk',
   api_key: '1234567890abcdefghij1234567890abcdefghij1234567890abcdefghij1234'
@@ -92,11 +93,11 @@
 
 ```ruby
 client = BacklogKit::Client.new
 ```
 
-## Supported API
+## Supported APIs
 
 * Git
 * Group
 * Issue
 * Notification
@@ -107,10 +108,10 @@
 * Star
 * Status
 * User
 * Wiki
 
-See [RDoc](http://www.rubydoc.info/gems/backlog_kit) for more details.
+See [documentation](http://www.rubydoc.info/gems/backlog_kit) for more details.
 
 ## Supported Ruby Versions
 
 * Ruby 2.0.0
 * Ruby 2.1