Update README

Author: mbonneau

README.md

@@ -7,7 +7,6 @@ A simple echo server:
 ```php
 use Ratchet\RFC6455\Messaging\Message;
 use React\EventLoop\Factory;
-use React\Http\MiddlewareRunner;
 use React\Http\Server;
 use Voryx\WebSocketMiddleware\WebSocketConnection;
 use Voryx\WebSocketMiddleware\WebSocketMiddleware;
@@ -28,3 +27,16 @@ $server->listen(new \React\Socket\Server('127.0.0.1:4321', $loop));
 
 $loop->run();
 ```
+# Options
+By default `WebSocketMiddleware` uses the `ratchet/rfc6455` default max sizes for messages and frames and also disables compression.
+These settings can be overridden with the `WebSocketOptions` object.
+```php
+$ws = new WebSocketMiddleware(
+    [],
+    $connectionHandler,
+    [],
+    WebSocketOptions::getDefault()
+        ->withMaxFramePayloadSize(2048)
+        ->withMaxMessagePayloadSize(4096)
+        ->withPermessageDeflate());
+```