updated docs, added links to compare versions in changelog

CHANGELOG.md

@@ -4,21 +4,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/) 
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## 0.4.0 - 2017-04-18
+## [0.4.0] - 2017-04-18
 
 ### Added
 
 * New option `header()` to configure the header name
 
-## 0.3.0 - 2016-12-26
+## [0.3.0] - 2016-12-26
 
 ### Changed
 
 * Updated tests
 * Updated to `http-interop/http-middleware#0.4`
 * Updated `friendsofphp/php-cs-fixer#2.0`
 
-## 0.2.0 - 2016-11-27
+## [0.2.0] - 2016-11-27
 
 ### Changed
 
@@ -27,3 +27,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## 0.1.0 - 2016-10-05
 
 First version
+
+[0.4.0]: https://github.com/middlewares/uuid/compare/v0.3.0...v0.4.0
+[0.3.0]: https://github.com/middlewares/uuid/compare/v0.2.0...v0.3.0
+[0.2.0]: https://github.com/middlewares/uuid/compare/v0.1.0...v0.2.0

README.md

@@ -43,6 +43,12 @@ $response = $dispatcher->dispatch(new ServerRequest());
 echo $response->getHeaderLine('X-Uuid');
 ```
 
+## Options
+
+#### `header(string $header)`
+
+To configure the header name. By default is `X-Uuid`.
+
 ---
 
 Please see [CHANGELOG](CHANGELOG.md) for more information about recent changes and [CONTRIBUTING](CONTRIBUTING.md) for contributing details.