added readme, changelog, license and composer files.

extensions/codeception/CHANGELOG.md

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+Yii Framework 2 Codeception extension Change Log
+================================================
+
+2.0.0 beta under development
+----------------------------
+
+- no changes in this release.
+
+2.0.0 alpha, December 1, 2013
+-----------------------------
+
+- Initial release.

extensions/codeception/LICENSE.md

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+The Yii framework is free software. It is released under the terms of
+the following BSD License.
+
+Copyright © 2008-2013 by Yii Software LLC (http://www.yiisoft.com)
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+ * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in
+   the documentation and/or other materials provided with the
+   distribution.
+ * Neither the name of Yii Software LLC nor the names of its
+   contributors may be used to endorse or promote products derived
+   from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.

extensions/codeception/README.md

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+Codeception Extension for Yii 2
+===============================
+
+This extension provides a `Codeception` mail solution for Yii 2. It includes some classes that are useful
+for unit-testing (```TestCase```) or for codeception page-objects (```BasePage```).
+
+When using codeception page-objects they have some similar code, this code was extracted and put into the ```BasePage```
+class to reduce code duplication. Simply extend your page object from this class, like it is done in ```yii2-basic``` and 
+```yii2-advanced``` boilerplates.
+
+For unit testing there is a ```TestCase``` class which holds some common features like application creation before each test
+and application destroy after each test. You can configure your application by this class. ```TestCase``` is extended from ```PHPUnit_Framework_TestCase``` so all
+methods and assertions are available.
+
+```php
+SomeConsoleTestTest extends yii\codeception\TestCase
+{
+	# by default it is @tests/unit/_bootstrap.php which holds some basic things like: 
+	# including composer autoload, include BaseYii class.
+	public $baseConfig = '@app/config/console.php';
+
+	public $applicationClass = 'yii\console\Application';
+}
+```
+Dont forget that you still need to include autoload and BaseYii class, like in the _bootstrap.php file (comments above).
+
+You also can reconfigure some components for tests, for this purpose there is a ```$config``` property in the testcase.
+
+```php
+SomeOtherTest extends yii\codeception\TestCase
+{
+	public $config = [
+		'components' => [
+			'mail' => [
+				'useFileTransport' => true,
+			],
+		]
+	];
+}
+```
+
+Because of Codeception buffers all output you cant make simple ```var_dump()``` in the TestCase, instead you need to use
+```Codeception\Util\Debug::debug()``` function and then run test with ```--debug``` key, for example:
+
+```php
+
+use \Codeception\Util\Debug;
+
+SomeDebugTest extends yii\codeception\TestCase
+{
+
+	public function testSmth()
+	{
+		Debug::debug('some my string);
+		Debug::debug($someArray);
+		Debug::debug($someObject);
+	}
+
+}
+```
+
+Then run command ```php codecept.phar run --debug unit/SomeDebugTest``` (Codeception also available through composer) and you will see in output:
+
+```html
+  some string
+
+  Array
+  (
+      [0] => 1
+      [1] => 2
+      [2] => 3
+      [3] => 4
+      [4] => 5
+  )
+  
+  yii\web\User Object
+  (
+      [identityClass] => app\models\User
+      [enableAutoLogin] => 
+      [loginUrl] => Array
+          (
+              [0] => site/login
+          )
+  
+      [identityCookie] => Array
+          (
+              [name] => _identity
+              [httpOnly] => 1
+          )
+  
+      [authTimeout] => 
+      [autoRenewCookie] => 1
+      [idVar] => __id
+      [authTimeoutVar] => __expire
+      [returnUrlVar] => __returnUrl
+      [_access:yii\web\User:private] => Array
+          (
+          )
+  
+      [_identity:yii\web\User:private] => 
+      [_events:yii\base\Component:private] => 
+      [_behaviors:yii\base\Component:private] => 
+  )
+
+```
+
+
+For further instructions refer to the related section in the Yii Definitive Guide (https://github.com/yiisoft/yii2/blob/master/docs/guide/testing.md).
+
+
+Installation
+------------
+
+The preferred way to install this extension is through [composer](http://getcomposer.org/download/).
+
+Either run
+
+```
+php composer.phar require yiisoft/yii2-codeception "*"
+```
+
+or add
+
+```json
+"yiisoft/yii2-codeception": "*"
+```
+
+to the require section of your composer.json.

extensions/codeception/composer.json

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+{
+	"name": "yiisoft/yii2-codeception",
+	"description": "The Codeception integration for the Yii framework",
+	"keywords": ["yii", "codeception"],
+	"type": "yii2-extension",
+	"license": "BSD-3-Clause",
+	"support": {
+		"forum": "http://www.yiiframework.com/forum/",
+		"wiki": "http://www.yiiframework.com/wiki/",
+		"irc": "irc://irc.freenode.net/yii",
+		"source": "https://github.com/yiisoft/yii2"
+	},
+	"authors": [
+		{
+			"name": "Mark Jebri",
+			"email": "mark.github@yandex.ru"
+		}
+	],
+	"require": {
+		"yiisoft/yii2": "*"
+	},
+	"autoload": {
+		"psr-0": { "yii\\codeception\\": "" }
+	},
+	"target-dir": "yii/codeception"
+}