Update README

Author: kelunik

CONTRIBUTING.md

@@ -23,8 +23,4 @@ Truths which we believe to be self-evident:
 
 ## Code style
 
-The amphp project adheres to the PSR-2 style guide with the exception that
-opening braces for classes and methods must appear on the same line as
-the declaration:
-
-https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md
+The amphp project adheres to the [PSR-2 style guide](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md).

README.md

@@ -2,27 +2,53 @@
 
 ![License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)
 
-`amphp/phpunit-util` is a small helper package to ease testing with PHPUnit in combination with the [`amp`](https://github.com/amphp/amp) concurrency framework.
+`amphp/phpunit-util` is a small helper package to ease testing with PHPUnit in combination with the [`Amp`](https://github.com/amphp/amp) concurrency framework.
 
 **Required PHP Version**
 
 - PHP 7.0+
 
-**Installation**
+## Installation
 
 ```bash
 composer require --dev amphp/phpunit-util
 ```
 
-**Usage**
+## Usage
 
-Currently, this package only provides a PHPUnit `TestListener` to reset the global event loop after each test. By adding the listener to your PHPUnit configuration, each test will be executed with a completely new event loop instance.
+```php
+<?php
+
+namespace Foo;
+
+use Amp\ByteStream;
+use Amp\PHPUnit\AsyncTestCase;
+use Amp\Socket;
+
+class BarTest extends AsyncTestCase
+{
+    // Each test case is executed as a coroutine and checked to run to completion
+    public function test()
+    {
+        $socket = yield Socket\connect('tcp://localhost:12345');
+        yield $socket->write('foobar');
+        
+        $this->assertSame('foobar', yield ByteStream\buffer($socket));
+    }
+}
+```
+
+#### Deprecated Functionality
+
+This package also provides a PHPUnit `TestListener` to reset the global event loop after each test, but this is deprecated.
 
 ```xml
 <phpunit>
     <!-- ... -->
 
+    <!-- DEPRECATED, use AsyncTestCase instead -->
     <listeners>
+        <!-- DEPRECATED, use AsyncTestCase instead --> 
         <listener class="Amp\PHPUnit\LoopReset" />
     </listeners>