fixed extension documentation

extensions/composer/README.md

 Yii 2.0 Public Preview - Composer Installer
-======================
+===========================================
 
 Thank you for choosing Yii - a high-performance component-based PHP framework.
 
@@ -13,33 +13,32 @@ without prior notices. **Yii 2.0 is not ready for production use yet.**
 
 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 *
+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, the composer.json file has to be modified 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.
-
-
+- [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 do for you and what it can't.
 
+You can also use this as a template to create your own composer additions to ease development and deployment of your app.

extensions/jui/README.md

 Yii 2.0 Public Preview - JUI Extension
-======================
+======================================
 
 Thank you for choosing Yii - a high-performance component-based PHP framework.
 
@@ -13,13 +13,15 @@ without prior notices. **Yii 2.0 is not ready for production use yet.**
 
 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*
+php composer.phar require yiisoft/yii2-jui "*"
 ```
 
 or add
@@ -33,23 +35,21 @@ to the require section of your composer.json.
 
 
 Usage & Documentation
------------
+---------------------
 
 This extension provides 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)
-
-
-
+For further instructions refer to the yii guide.
 

extensions/mutex/README.md

 Yii 2.0 Public Preview - Mutex Extension
-======================
+========================================
 
 Thank you for choosing Yii - a high-performance component-based PHP framework.
 
@@ -13,13 +13,15 @@ without prior notices. **Yii 2.0 is not ready for production use yet.**
 
 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 *
+php composer.phar require yiisoft/yii2-mutex "*"
 ```
 
 or add
@@ -33,12 +35,8 @@ to the require section of your composer.json.
 
 
 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.
-
-
-
-
+For concrete examples and advanced usage refer to the yii guide.

extensions/smarty/README.md

 Yii 2.0 Public Preview - Smarty View Renderer
-======================
+=============================================
 
 Thank you for choosing Yii - a high-performance component-based PHP framework.
 
@@ -13,13 +13,15 @@ without prior notices. **Yii 2.0 is not ready for production use yet.**
 
 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 *
+php composer.phar require yiisoft/yii2-smarty "*"
 ```
 
 or add
@@ -33,12 +35,13 @@ to the require section of your composer.json.
 
 
 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: 
+Example:
+
 ```php
 <?php
 // config.php
@@ -58,8 +61,4 @@ return array(
 );
 ```
 
-For further instructions refer to the related section in the guide.
-
-
-
-
+For further instructions refer to the related section in the yii guide.

extensions/twig/README.md

 Yii 2.0 Public Preview - Twig View Renderer
-======================
+===========================================
 
 Thank you for choosing Yii - a high-performance component-based PHP framework.
 
@@ -13,13 +13,15 @@ without prior notices. **Yii 2.0 is not ready for production use yet.**
 
 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 *
+php composer.phar require yiisoft/yii2-twig "*"
 ```
 
 or add
@@ -33,7 +35,7 @@ to the require section of your composer.json.
 
 
 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.
@@ -59,6 +61,4 @@ return array(
 );
 ```
 
-For further instructions refer to the related section in the guide.
-
-
+For further instructions refer to the related section in the yii guide.