Added readme and license files to extensions.

extensions/composer/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/composer/README.md

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+Yii 2.0 Public Preview - Composer Installer
+======================
+
+Thank you for choosing Yii - a high-performance component-based PHP framework.
+
+If you are looking for a production-ready PHP framework, please use
+[Yii v1.1](https://github.com/yiisoft/yii).
+
+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.**
+
+[![Build Status](https://secure.travis-ci.org/yiisoft/yii2.png)](http://travis-ci.org/yiisoft/yii2)
+
+This is the yii2 composer installer.
+
+Installation
+----------------
+
+This extension offers you enhanced composer handling for your yii2-project. It will therefor require you to use composer.
+
+`
+php composer.phar require yiisoft/yii2-composer *
+`
+
+*Note: You might have to run `php composer.phar selfupdate` before using this extension.*
+
+
+Usage & Documentation
+-----------
+This extensions allows you to hook to certain composer events and prepare your yii2-app for usage.
+
+After the package is installed you have to modify your composer.json to enable this extension.
+
+To see it in action take a look at the example apps in the repository:
+
+[Basic](https://github.com/suralc/yii2/blob/master/apps/basic/composer.json#L27)
+[Advanced](https://github.com/suralc/yii2/blob/extensions-readme/apps/advanced/composer.json)
+
+However it might be useful to read through the official composer [documentation](http://getcomposer.org/doc/articles/scripts.md) to understand what this extension can to for you and what it can't. 
+
+You can also use this as an template to create your own composer additions to ease development and deployment of your app.
+
+
+
+

extensions/jui/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/jui/README.md

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+Yii 2.0 Public Preview - JUI Extension
+======================
+
+Thank you for choosing Yii - a high-performance component-based PHP framework.
+
+If you are looking for a production-ready PHP framework, please use
+[Yii v1.1](https://github.com/yiisoft/yii).
+
+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.**
+
+[![Build Status](https://secure.travis-ci.org/yiisoft/yii2.png)](http://travis-ci.org/yiisoft/yii2)
+
+This is the yii2-jui extension.
+
+Installation
+----------------
+The preferred way to install this extension is [composer](http://getcomposer.org/download/).
+
+Either run
+```
+php composer.phar require yiisoft/yii2-jui*
+```
+
+or add
+```
+"yiisoft/yii2-jui": "*"
+```
+to the require section of your composer.json.
+
+
+*Note: You might have to run `php composer.phar selfupdate`*
+
+
+Usage & Documentation
+-----------
+
+This extension provides the multiple widgets to work with jquery.ui, as well as a set of compatible jquery.ui files.
+
+You can use these widgets in your view files after you have registered the corresponding assets.
+
+Example:
+-----------
+```php
+echo ProgressBar::widget(array(
+	'clientOptions' => array(
+		'value' => 75,
+	),
+));
+
+For further instructions refer to the guide (once it is finished)
+
+
+
+

extensions/mutex/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/mutex/README.md

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+Yii 2.0 Public Preview - Mutex Extension
+======================
+
+Thank you for choosing Yii - a high-performance component-based PHP framework.
+
+If you are looking for a production-ready PHP framework, please use
+[Yii v1.1](https://github.com/yiisoft/yii).
+
+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.**
+
+[![Build Status](https://secure.travis-ci.org/yiisoft/yii2.png)](http://travis-ci.org/yiisoft/yii2)
+
+This is the yii2-mutex extension.
+
+Installation
+----------------
+The prefered way to install this extension is through [composer](http://getcomposer.org/download/).
+
+Either run
+```
+php composer.phar require yiisoft/yii2-mutex *
+```
+
+or add
+```
+"yiisoft/yii2-mutex": "*"
+```
+to the require section of your composer.json.
+
+
+*Note: You might have to run `php composer.phar selfupdate`*
+
+
+Usage & Documentation
+-----------
+
+This component can be used to perform actions similar to the concept of [mutual exclusion](http://en.wikipedia.org/wiki/Mutual_exclusion).
+
+For concrete examples and advanced usage refer to the guide.
+
+
+
+

extensions/smarty/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/smarty/README.md

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+Yii 2.0 Public Preview - Smarty View Renderer
+======================
+
+Thank you for choosing Yii - a high-performance component-based PHP framework.
+
+If you are looking for a production-ready PHP framework, please use
+[Yii v1.1](https://github.com/yiisoft/yii).
+
+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.**
+
+[![Build Status](https://secure.travis-ci.org/yiisoft/yii2.png)](http://travis-ci.org/yiisoft/yii2)
+
+This is the yii2-smarty extension.
+
+Installation
+----------------
+The prefered way to install this extension is through [composer](http://getcomposer.org/download/).
+
+Either run
+```
+php composer.phar require yiisoft/yii2-smarty *
+```
+
+or add
+```json
+"yiisoft/yii2-smarty": "*"
+```
+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 do this add the following to the $rendereres property of the view instance you want to use this with:
+
+Example: 
+```php
+<?php
+// config.php
+return array(
+	//....
+	'components' => array(
+		'view' => array(
+			'class' => 'yii\base\View',
+			'viewRenderers' => array(
+				'tpl' => array(
+					'class' => 'yii\smarty\ViewRenderer',
+					//'cachePath' => '@runtime/Smarty/cache',
+				),
+			),
+		),
+	),
+);
+```
+
+For further instructions refer to the related section in the guide.
+
+
+
+

extensions/twig/LICENSE.md

@@ -0,0 +1,32 @@
+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/twig/README.md

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+Yii 2.0 Public Preview - Twig View Renderer
+======================
+
+Thank you for choosing Yii - a high-performance component-based PHP framework.
+
+If you are looking for a production-ready PHP framework, please use
+[Yii v1.1](https://github.com/yiisoft/yii).
+
+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.**
+
+[![Build Status](https://secure.travis-ci.org/yiisoft/yii2.png)](http://travis-ci.org/yiisoft/yii2)
+
+This is the yii2-twig extension.
+
+Installation
+----------------
+The prefered way to install this extension is through [composer](http://getcomposer.org/download/).
+
+Either run
+```
+php composer.phar require yiisoft/yii2-twig *
+```
+
+or add
+```
+"yiisoft/yii2-twig": "*"
+```
+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 do this add the following to the $rendereres property of the view instance you want to use this with:
+
+Example: 
+```php
+<?php
+// config.php
+return array(
+	//....
+	'components' => array(
+		'view' => array(
+			'class' => 'yii\base\View',
+			'viewRenderers' => array(
+				'twig' => array(
+					'class' => 'yii\twig\ViewRenderer',
+					//'cachePath' => '@runtime/Twig/cache',
+					//'options' => array(), /*  Array of twig options */
+				),
+			),
+		),
+	),
+);
+```
+
+For further instructions refer to the related section in the guide.
+
+