minor touch up of swiftmailer.

Mailer.php

@@ -7,9 +7,9 @@
 
 namespace yii\swiftmailer;
 
+use Yii;
 use yii\base\InvalidConfigException;
 use yii\mail\BaseMailer;
-use Yii;
 
 /**
  * Mailer based on SwiftMailer library.
@@ -116,13 +116,14 @@ class Mailer extends BaseMailer
 	 */
 	protected function createTransport(array $config)
 	{
-		if (array_key_exists('class', $config)) {
+		if (isset($config['class'])) {
 			$className = $config['class'];
 			unset($config['class']);
 		} else {
 			$className = 'Swift_MailTransport';
 		}
-		$transport = call_user_func([$className, 'newInstance']);
+		/** @var \Swift_MailTransport $transport */
+		$transport = $className::newInstance();
 		if (!empty($config)) {
 			foreach ($config as $name => $value) {
 				if (property_exists($transport, $name)) {
@@ -139,4 +140,4 @@ class Mailer extends BaseMailer
 		}
 		return $transport;
 	}
-}
+}

README.md

@@ -1,17 +1,32 @@
-Yii 2.0 Public Preview - SwiftMailer Mail Solution
-==================================================
+SwiftMailer Extension for Yii 2
+===============================
 
-Thank you for choosing Yii - a high-performance component-based PHP framework.
+This extension provides a `SwiftMailer` mail solution for Yii 2.
 
-If you are looking for a production-ready PHP framework, please use
-[Yii v1.1](https://github.com/yiisoft/yii).
+To use this extension,  simply add the following code in your application configuration:
 
-Yii 2.0 is still under heavy development. We may make significant changes
-without prior notices. **Yii 2.0 is not ready for production use yet.**
+```php
+return [
+	//....
+	'components' => [
+		'mail' => [
+			'class' => 'yii\swiftmailer\Mailer',
+		],
+	],
+];
+```
+
+You can then send an email as follows:
 
-[![Build Status](https://secure.travis-ci.org/yiisoft/yii2.png)](http://travis-ci.org/yiisoft/yii2)
+```php
+Yii::$app->mail->compose('contact/html')
+     ->from('from@domain.com')
+     ->to($form->email)
+     ->subject($form->subject)
+     ->send();
+```
 
-This is the yii2-swiftmailer extension.
+For further instructions refer to the related section in the Yii Definitive Guide.
 
 
 Installation
@@ -20,39 +35,15 @@ Installation
 The preferred way to install this extension is through [composer](http://getcomposer.org/download/).
 
 Either run
+
 ```
 php composer.phar require yiisoft/yii2-swiftmailer "*"
 ```
 
 or add
+
 ```json
 "yiisoft/yii2-swiftmailer": "*"
 ```
-to the require section of your composer.json.
-
-
-*Note: You might have to run `php composer.phar selfupdate`*
-
-
-Usage & Documentation
----------------------
-
-This extension has to be registered prior to usage.
-To enable this view renderer add it to the $rendereres property of your view object.
-
-Example:
-
-```php
-<?php
-// config.php
-return [
-	//....
-	'components' => [
-		'mail' => [
-			'class' => 'yii\swiftmailer\Mailer',
-		],
-	],
-];
-```
 
-For further instructions refer to the related section in the yii guide.
+to the require section of your composer.json.