update

README.md

@@ -14,9 +14,8 @@ HttpExceptions
 ==============
 
 **All HTTP statuses from [RFC 7231](http://tools.ietf.org/html/rfc7231) implemented as separated exceptions.**
-**This library provides a simple and straightforward implementation of the IETF Problem Details for HTTP APIs [RFC 7807](https://tools.ietf.org/html/rfc7807).**
 
-[Reference](https://www.iana.org/assignments/http-status-codes/http-status-codes.xml)
+**This library provides also a straightforward implementation of the IETF Problem Details for HTTP APIs [RFC 7807](https://tools.ietf.org/html/rfc7807).**
 
 abstract `HttpException` class and its subclasses provide exceptions corresponding to HTTP
 error status codes. The most common are included, but you can create exceptions
@@ -79,6 +78,8 @@ And `Chiron\Http\Exception\Server` namespace for 5xx http errors.
 | [NotExtendedHttpException](src/Server/NotExtendedHttpException.php)                   |  510 | "Not Extended"                     |
 | [NetworkAuthenticationRequiredHttpException](src/Server/NetworkAuthenticationRequiredHttpException.php)                   |  511 | "Network Authentication Required"                     |
 
+[Reference 4xx - 5xx](https://www.iana.org/assignments/http-status-codes/http-status-codes.xml)
+
 Basic Usage
 -----------