Remove 5.3 references

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.3
   - 5.4
   - 5.5
   - 5.6

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://secure.travis-ci.org/ratchetphp/Ratchet.png?branch=master)](http://travis-ci.org/ratchetphp/Ratchet)
 [![Latest Stable Version](https://poser.pugx.org/cboden/ratchet/v/stable.png)](https://packagist.org/packages/cboden/ratchet)
 
-A PHP 5.3 library for asynchronously serving WebSockets.
+A PHP 5.4 library for asynchronously serving WebSockets.
 Build up your application through simple interfaces and re-use your application without changing any of its code just by combining different components.
 
 ##WebSocket Compliance
@@ -19,8 +19,6 @@ To avoid proxy/firewall blockage it's recommended WebSockets are requested on po
 In order to do this, along with your sync web stack, you can either use a reverse proxy or two separate machines.
 You can find more details in the [server conf docs](http://socketo.me/docs/deploy#serverconfiguration).
 
-PHP 5.3.9 (or higher) is required. If you have access, PHP 5.4 (or higher) is *highly* recommended for its performance improvements.
-
 ### Documentation
 
 User and API documentation is available on Ratchet's website: http://socketo.me
@@ -87,4 +85,4 @@ class MyChat implements MessageComponentInterface {
     var conn = new WebSocket('ws://localhost:8080/echo');
     conn.onmessage = function(e) { console.log(e.data); };
     conn.send('Hello Me!');
-```
+```