diff --git a/apps/bootstrap/assets/.gitignore b/apps/bootstrap/assets/.gitignore
new file mode 100644
index 0000000..72e8ffc
--- /dev/null
+++ b/apps/bootstrap/assets/.gitignore
@@ -0,0 +1 @@
+*
diff --git a/apps/bootstrap/composer.json b/apps/bootstrap/composer.json
index 86e399b..b2300b2 100644
--- a/apps/bootstrap/composer.json
+++ b/apps/bootstrap/composer.json
@@ -12,9 +12,6 @@
 		"irc": "irc://irc.freenode.net/yii",
 		"source": "https://github.com/yiisoft/yii2"
 	},
-	"config": {
-		"vendor-dir": "vendor"
-	},
 	"minimum-stability": "dev",
 	"require": {
 		"php": ">=5.3.0",
diff --git a/apps/bootstrap/www/index.php b/apps/bootstrap/www/index.php
index 7938c85..0875881 100644
--- a/apps/bootstrap/www/index.php
+++ b/apps/bootstrap/www/index.php
@@ -3,7 +3,7 @@
 // comment out the following line to disable debug mode
 defined('YII_DEBUG') or define('YII_DEBUG', true);
 
-require(__DIR__ . '/../vendor/yiisoft/yii2/yii.php');
+require(__DIR__ . '/../vendor/yiisoft/yii2/Yii.php');
 require(__DIR__ . '/../vendor/autoload.php');
 
 $config = require(__DIR__ . '/../config/main.php');
diff --git a/apps/bootstrap/yii b/apps/bootstrap/yii
index fa8db10..e35ae3a 100755
--- a/apps/bootstrap/yii
+++ b/apps/bootstrap/yii
@@ -13,7 +13,7 @@ defined('YII_DEBUG') or define('YII_DEBUG', true);
 // fcgi doesn't have STDIN defined by default
 defined('STDIN') or define('STDIN', fopen('php://stdin', 'r'));
 
-require(__DIR__ . '/vendor/yiisoft/yii2/yii.php');
+require(__DIR__ . '/vendor/yiisoft/yii2/Yii.php');
 require(__DIR__ . '/vendor/autoload.php');
 
 $config = require(__DIR__ . '/config/console.php');
diff --git a/tests/unit/framework/rbac/ManagerTestBase.php b/tests/unit/framework/rbac/ManagerTestBase.php
index 1ab7d52..1476f9d 100644
--- a/tests/unit/framework/rbac/ManagerTestBase.php
+++ b/tests/unit/framework/rbac/ManagerTestBase.php
@@ -32,7 +32,7 @@ abstract class ManagerTestBase extends TestCase
 		$this->assertEquals($item2->type, Item::TYPE_ROLE);
 
 		// test adding an item with the same name
-		$this->setExpectedException('Exception');
+		$this->setExpectedException('\yii\base\Exception');
 		$this->auth->createItem($name, $type, $description, $bizRule, $data);
 	}
 
@@ -69,14 +69,14 @@ abstract class ManagerTestBase extends TestCase
 		$this->auth->addItemChild('createPost', 'updatePost');
 
 		// test adding upper level item to lower one
-		$this->setExpectedException('Exception');
+		$this->setExpectedException('\yii\base\Exception');
 		$this->auth->addItemChild('readPost', 'reader');
 	}
 
 	public function testAddItemChild2()
 	{
 		// test adding inexistent items
-		$this->setExpectedException('Exception');
+		$this->setExpectedException('\yii\base\Exception');
 		$this->assertFalse($this->auth->addItemChild('createPost2', 'updatePost'));
 	}
 
@@ -105,7 +105,7 @@ abstract class ManagerTestBase extends TestCase
 		$this->assertEquals($auth->bizRule, 'rule');
 		$this->assertEquals($auth->data, 'data');
 
-		$this->setExpectedException('Exception');
+		$this->setExpectedException('\yii\base\Exception');
 		$this->auth->assign('new user', 'createPost2', 'rule', 'data');
 	}
 
@@ -158,7 +158,7 @@ abstract class ManagerTestBase extends TestCase
 
 	public function testDetectLoop()
 	{
-		$this->setExpectedException('Exception');
+		$this->setExpectedException('\yii\base\Exception');
 		$this->auth->addItemChild('readPost', 'readPost');
 	}
 
diff --git a/tests/unit/framework/web/ResponseTest.php b/tests/unit/framework/web/ResponseTest.php
index b3d9080..2fde63d 100644
--- a/tests/unit/framework/web/ResponseTest.php
+++ b/tests/unit/framework/web/ResponseTest.php
@@ -41,7 +41,7 @@ class ResponseTest extends \yiiunit\TestCase
 		static::$httpResponseCode = 200;
 	}
 
-	public function ranges()
+	public function rightRanges()
 	{
 		// TODO test more cases for range requests and check for rfc compatibility
 		// http://www.w3.org/Protocols/rfc2616/rfc2616.txt
@@ -53,14 +53,14 @@ class ResponseTest extends \yiiunit\TestCase
 	}
 
 	/**
-	 * @dataProvider ranges
+	 * @dataProvider rightRanges
 	 */
 	public function testSendFileRanges($rangeHeader, $expectedHeader, $length, $expectedFile)
 	{
 		$content = $this->generateTestFileContent();
-
 		$_SERVER['HTTP_RANGE'] = 'bytes=' . $rangeHeader;
 		$sent = $this->runSendFile('testFile.txt', $content, null);
+
 		$this->assertEquals($expectedFile, $sent);
 		$this->assertTrue(in_array('HTTP/1.1 206 Partial Content', static::$headers));
 		$this->assertTrue(in_array('Accept-Ranges: bytes', static::$headers));
@@ -69,6 +69,30 @@ class ResponseTest extends \yiiunit\TestCase
 		$this->assertTrue(in_array('Content-Length: ' . $length, static::$headers));
 	}
 
+	public function wrongRanges()
+	{
+		// TODO test more cases for range requests and check for rfc compatibility
+		// http://www.w3.org/Protocols/rfc2616/rfc2616.txt
+		return array(
+			array('1-2,3-5,6-10'),	// multiple range request not supported
+			array('5-1'),			// last-byte-pos value is less than its first-byte-pos value
+			array('-100000'),		// last-byte-pos bigger then content length
+			array('10000-'),			// first-byte-pos bigger then content length
+		);
+	}
+
+	/**
+	 * @dataProvider wrongRanges
+	 */
+	public function testSendFileWrongRanges($rangeHeader)
+	{
+		$this->setExpectedException('yii\base\HttpException', 'Requested Range Not Satisfiable');
+
+		$content = $this->generateTestFileContent();
+		$_SERVER['HTTP_RANGE'] = 'bytes=' . $rangeHeader;
+		$this->runSendFile('testFile.txt', $content, null);
+	}
+
 	protected function generateTestFileContent()
 	{
 		return '12ёжик3456798áèabcdefghijklmnopqrstuvwxyz!"§$%&/(ёжик)=?';
@@ -83,4 +107,4 @@ class ResponseTest extends \yiiunit\TestCase
 		$file = ob_get_clean();
 		return $file;
 	}
-}
\ No newline at end of file
+}
diff --git a/yii/base/View.php b/yii/base/View.php
index cf92741..8bede3d 100644
--- a/yii/base/View.php
+++ b/yii/base/View.php
@@ -741,7 +741,7 @@ class View extends Component
 			$lines[] = Html::script(implode("\n", $this->js[self::POS_END]), array('type' => 'text/javascript'));
 		}
 		if (!empty($this->js[self::POS_READY])) {
-			$js = "jQuery(document).ready(function(){\n{" . implode("\n", $this->js[self::POS_READY]) . "}\n});";
+			$js = "jQuery(document).ready(function(){\n" . implode("\n", $this->js[self::POS_READY]) . "\n});";
 			$lines[] = Html::script($js, array('type' => 'text/javascript'));
 		}
 		return empty($lines) ? '' : implode("\n", $lines) . "\n";
diff --git a/yii/bootstrap/Modal.php b/yii/bootstrap/Modal.php
index 5e287c5..1a70209 100644
--- a/yii/bootstrap/Modal.php
+++ b/yii/bootstrap/Modal.php
@@ -8,279 +8,234 @@
 namespace yii\bootstrap;
 
 use Yii;
-use yii\helpers\Html;
 use yii\helpers\ArrayHelper;
+use yii\helpers\Html;
 
 /**
- * Modal renders a bootstrap modal on the page for its use on your application.
+ * Modal renders a modal window that can be toggled by clicking on a button.
+ *
+ * For example,
  *
- * Basic usage:
+ * ~~~php
+ * echo Modal::widget(array(
+ *     'header' => '<h2>Hello world</h2>',
+ *     'body' => 'Say hello...',
+ *     'toggleButton' => array(
+ *         'label' => 'click me',
+ *     ),
+ * ));
+ * ~~~
+ *
+ * The following example will show the content enclosed between the [[begin()]]
+ * and [[end()]] calls within the modal window:
  *
- * ```php
- * $this->widget(Modal::className(), array(
- * 	'id' => 'myModal',
- * 	'header' => 'Modal Heading',
- * 	'content' => '<p>One fine body...</p>',
- * 	'footer' => 'Modal Footer',
- *  // if we wish to display a modal button
- * 	'buttonOptions' => array(
- * 		'label' => 'Show Modal',
- * 		'class' => 'btn btn-primary'
- * 		)
+ * ~~~php
+ * Modal::begin(array(
+ *     'header' => '<h2>Hello world</h2>',
+ *     'toggleButton' => array(
+ *         'label' => 'click me',
+ *     ),
  * ));
- * ```
+ *
+ * echo 'Say hello...';
+ *
+ * Modal::end();
+ * ~~~
+ *
  * @see http://twitter.github.io/bootstrap/javascript.html#modals
  * @author Antonio Ramirez <amigo.cobos@gmail.com>
+ * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
  */
 class Modal extends Widget
 {
 	/**
-	 * @var array  The additional HTML attributes of the button that will show the modal. If empty array, only
-	 * the markup of the modal will be rendered on the page, so users can easily call the modal manually with their own
-	 * scripts. The following special attributes are available:
-	 * <ul>
-	 *    <li>label: string, the label of the button</li>
-	 * </ul>
-	 *
-	 * For available options of the button trigger, see http://twitter.github.com/bootstrap/javascript.html#modals.
-	 */
-	public $buttonOptions = array();
-
-	/**
-	 * @var boolean indicates whether the modal should use transitions. Defaults to 'true'.
-	 */
-	public $fade = true;
-
-	/**
-	 * @var bool $keyboard, closes the modal when escape key is pressed.
-	 */
-	public $keyboard = true;
-
-	/**
-	 * @var bool $show, shows the modal when initialized.
-	 */
-	public $show = false;
-
-	/**
-	 * @var mixed includes a modal-backdrop element. Alternatively, specify `static` for a backdrop which doesn't close
-	 * the modal on click.
-	 */
-	public $backdrop = true;
-
-	/**
-	 * @var mixed the remote url. If a remote url is provided, content will be loaded via jQuery's load method and
-	 * injected into the .modal-body of the modal.
+	 * @var string the header content in the modal window.
 	 */
-	public $remote;
-
-	/**
-	 * @var string a javascript function that will be invoked immediately when the `show` instance method is called.
-	 */
-	public $onShow;
-
-	/**
-	 * @var string a javascript function that will be invoked when the modal has been made visible to the user
-	 *     (will wait for css transitions to complete).
-	 */
-	public $onShown;
-
-	/**
-	 * @var string a javascript function that will be invoked immediately when the hide instance method has been called.
-	 */
-	public $onHide;
-
-	/**
-	 * @var string a javascript function that will be invoked when the modal has finished being hidden from the user
-	 *     (will wait for css transitions to complete).
-	 */
-	public $onHidden;
-
-	/**
-	 * @var string[] the Javascript event handlers.
-	 */
-	protected $events = array();
-
+	public $header;
 	/**
-	 * @var array $pluginOptions the plugin options.
+	 * @var string the body content in the modal window. Note that anything between
+	 * the [[begin()]] and [[end()]] calls of the Modal widget will also be treated
+	 * as the body content, and will be rendered before this.
 	 */
-	protected $pluginOptions = array();
-
+	public $body;
 	/**
-	 * @var string
+	 * @var string the footer content in the modal window.
 	 */
-	public $closeText = '&times;';
-
+	public $footer;
 	/**
-	 * @var string header content. Header can also be a path to a view file.
+	 * @var array the options for rendering the close button tag.
+	 * The close button is displayed in the header of the modal window. Clicking
+	 * on the button will hide the modal window. If this is null, no close button will be rendered.
+	 *
+	 * The following special options are supported:
+	 *
+	 * - tag: string, the tag name of the button. Defaults to 'button'.
+	 * - label: string, the label of the button. Defaults to '&times;'.
+	 *
+	 * The rest of the options will be rendered as the HTML attributes of the button tag.
+	 * Please refer to the [Modal plugin help](http://twitter.github.com/bootstrap/javascript.html#modals)
+	 * for the supported HTML attributes.
 	 */
-	public $header;
-
+	public $closeButton = array();
 	/**
-	 * @var string body of modal. Body can also be a path to a view file.
+	 * @var array the options for rendering the toggle button tag.
+	 * The toggle button is used to toggle the visibility of the modal window.
+	 * If this property is null, no toggle button will be rendered.
+	 *
+	 * The following special options are supported:
+	 *
+	 * - tag: string, the tag name of the button. Defaults to 'button'.
+	 * - label: string, the label of the button. Defaults to 'Show'.
+	 *
+	 * The rest of the options will be rendered as the HTML attributes of the button tag.
+	 * Please refer to the [Modal plugin help](http://twitter.github.com/bootstrap/javascript.html#modals)
+	 * for the supported HTML attributes.
 	 */
-	public $content;
+	public $toggleButton;
 
-	/**
-	 * @var string footer content. Content can also be a path to a view file.
-	 */
-	public $footer;
 
 	/**
-	 * Widget's init method
+	 * Initializes the widget.
 	 */
 	public function init()
 	{
 		parent::init();
 
-		$this->name = 'modal';
-
-		$this->defaultOption('id', $this->getId());
-
-		$this->defaultOption('role', 'dialog');
-		$this->defaultOption('tabindex', '-1');
-
-		$this->addClassName('modal');
-		$this->addClassName('hide');
-
-		if ($this->fade)
-			$this->addClassName('fade');
+		$this->initOptions();
 
-		$this->initPluginOptions();
-		$this->initPluginEvents();
+		echo $this->renderToggleButton() . "\n";
+		echo Html::beginTag('div', $this->options) . "\n";
+		echo $this->renderHeader() . "\n";
+		echo $this->renderBodyBegin() . "\n";
 	}
 
 	/**
-	 * Initialize plugin events if any
+	 * Renders the widget.
 	 */
-	public function initPluginEvents()
-	{
-		foreach (array('onShow', 'onShown', 'onHide', 'onHidden') as $event) {
-			if ($this->{$event} !== null) {
-				$modalEvent = strtolower(substr($event, 2));
-				if ($this->{$event} instanceof JsExpression)
-					$this->events[$modalEvent] = $this->$event;
-				else
-					$this->events[$modalEvent] = new JsExpression($this->{$event});
-			}
-		}
-	}
-
-	/**
-	 * Initialize plugin options.
-	 * ***Important***: The display of the button overrides the initialization of the modal bootstrap widget.
-	 */
-	public function initPluginOptions()
+	public function run()
 	{
-		if (null !== $this->remote)
-			$this->pluginOptions['remote'] = Html::url($this->remote);
+		echo "\n" . $this->renderBodyEnd();
+		echo "\n" . $this->renderFooter();
+		echo "\n" . Html::endTag('div');
 
-		foreach (array('backdrop', 'keyboard', 'show') as $option) {
-			$this->pluginOptions[$option] = isset($this->pluginOptions[$option])
-				? $this->pluginOptions[$option]
-				: $this->{$option};
-		}
+		$this->registerPlugin('modal');
 	}
 
 	/**
-	 * Widget's run method
+	 * Renders the header HTML markup of the modal
+	 * @return string the rendering result
 	 */
-	public function run()
+	protected function renderHeader()
 	{
-		$this->renderModal();
-		$this->renderButton();
-		$this->registerScript();
+		$button = $this->renderCloseButton();
+		if ($button !== null) {
+			$this->header = $button . "\n" . $this->header;
+		}
+		if ($this->header !== null) {
+			return Html::tag('div', "\n" . $this->header . "\n", array('class' => 'modal-header'));
+		} else {
+			return null;
+		}
 	}
 
 	/**
-	 * Renders the button that will open the modal if its options have been configured
+	 * Renders the opening tag of the modal body.
+	 * @return string the rendering result
 	 */
-	public function renderButton()
+	protected function renderBodyBegin()
 	{
-		if (!empty($this->buttonOptions)) {
-
-			$this->buttonOptions['data-toggle'] = isset($this->buttonOptions['data-toggle'])
-				? $this->buttonOptions['data-toggle']
-				: 'modal';
-
-			if ($this->remote !== null && !isset($this->buttonOptions['data-remote']))
-				$this->buttonOptions['data-remote'] = Html::url($this->remote);
-
-			$label = ArrayHelper::remove($this->buttonOptions, 'label', 'Button');
-			$name = ArrayHelper::remove($this->buttonOptions, 'name');
-			$value = ArrayHelper::remove($this->buttonOptions, 'value');
-
-			$attr = isset($this->buttonOptions['data-remote'])
-				? 'data-target'
-				: 'href';
-
-			$this->buttonOptions[$attr] = isset($this->buttonOptions[$attr])
-				? $this->buttonOptions[$attr]
-				: '#' . ArrayHelper::getValue($this->options, 'id');
-
-			echo Html::button($label, $name, $value, $this->buttonOptions);
-		}
+		return Html::beginTag('div', array('class' => 'modal-body'));
 	}
 
 	/**
-	 * Renders the modal markup
+	 * Renders the closing tag of the modal body.
+	 * @return string the rendering result
 	 */
-	public function renderModal()
+	protected function renderBodyEnd()
 	{
-		echo Html::beginTag('div', $this->options);
-
-		$this->renderModalHeader();
-		$this->renderModalBody();
-		$this->renderModalFooter();
-
-		echo Html::endTag('div');
+		return $this->body . "\n" . Html::endTag('div');
 	}
 
 	/**
-	 * Renders the header HTML markup of the modal
+	 * Renders the HTML markup for the footer of the modal
+	 * @return string the rendering result
 	 */
-	public function renderModalHeader()
+	protected function renderFooter()
 	{
-		echo Html::beginTag('div', array('class'=>'modal-header'));
-		if ($this->closeText)
-			echo Html::button($this->closeText, null, null, array('data-dismiss' => 'modal', 'class'=>'close'));
-		echo $this->header;
-		echo Html::endTag('div');
+		if ($this->footer !== null) {
+			return Html::tag('div', "\n" . $this->footer . "\n", array('class' => 'modal-footer'));
+		} else {
+			return null;
+		}
 	}
 
 	/**
-	 * Renders the HTML markup for the body of the modal
+	 * Renders the toggle button.
+	 * @return string the rendering result
 	 */
-	public function renderModalBody()
+	protected function renderToggleButton()
 	{
-		echo Html::beginTag('div', array('class'=>'modal-body'));
-		echo $this->content;
-		echo Html::endTag('div');
+		if ($this->toggleButton !== null) {
+			$tag = ArrayHelper::remove($this->toggleButton, 'tag', 'button');
+			$label = ArrayHelper::remove($this->toggleButton, 'label', 'Show');
+			if ($tag === 'button' && !isset($this->toggleButton['type'])) {
+				$this->toggleButton['type'] = 'button';
+			}
+			return Html::tag($tag, $label, $this->toggleButton);
+		} else {
+			return null;
+		}
 	}
 
 	/**
-	 * Renders the HTML markup for the footer of the modal
+	 * Renders the close button.
+	 * @return string the rendering result
 	 */
-	public function renderModalFooter()
+	protected function renderCloseButton()
 	{
-
-		echo Html::beginTag('div', array('class'=>'modal-footer'));
-		echo $this->footer;
-		echo Html::endTag('div');
+		if ($this->closeButton !== null) {
+			$tag = ArrayHelper::remove($this->closeButton, 'tag', 'button');
+			$label = ArrayHelper::remove($this->closeButton, 'label', '&times;');
+			if ($tag === 'button' && !isset($this->closeButton['type'])) {
+				$this->closeButton['type'] = 'button';
+			}
+			return Html::tag($tag, $label, $this->closeButton);
+		} else {
+			return null;
+		}
 	}
 
 	/**
-	 * Registers client scripts
+	 * Initializes the widget options.
+	 * This method sets the default values for various options.
 	 */
-	public function registerScript()
+	protected function initOptions()
 	{
-		// do we render a button? If so, bootstrap will handle its behavior through its
-		// mark-up, otherwise, register the plugin.
-		if(empty($this->buttonOptions))
-			$this->registerPlugin('modal', $this->pluginOptions);
+		$this->options = array_merge(array(
+			'class' => 'modal hide',
+		), $this->options);
+		$this->addCssClass($this->options, 'modal');
+
+		$this->pluginOptions = array_merge(array(
+			'show' => false,
+		), $this->pluginOptions);
+
+		if ($this->closeButton !== null) {
+			$this->closeButton = array_merge(array(
+				'data-dismiss' => 'modal',
+				'aria-hidden' => 'true',
+				'class' => 'close',
+			), $this->closeButton);
+		}
 
-		// register events
-		$this->registerEvents($this->events);
+		if ($this->toggleButton !== null) {
+			$this->toggleButton = array_merge(array(
+				'data-toggle' => 'modal',
+			), $this->toggleButton);
+			if (!isset($this->toggleButton['data-target']) && !isset($this->toggleButton['href'])) {
+				$this->toggleButton['data-target'] = '#' . $this->options['id'];
+			}
+		}
 	}
-
-}
\ No newline at end of file
+}
diff --git a/yii/bootstrap/Widget.php b/yii/bootstrap/Widget.php
index c50349f..405cd19 100644
--- a/yii/bootstrap/Widget.php
+++ b/yii/bootstrap/Widget.php
@@ -9,19 +9,20 @@ namespace yii\bootstrap;
 
 use Yii;
 use yii\base\View;
+use yii\helpers\Json;
 
 
 /**
- * Bootstrap is the base class for bootstrap widgets.
+ * \yii\bootstrap\Widget is the base class for all bootstrap widgets.
  *
  * @author Antonio Ramirez <amigo.cobos@gmail.com>
+ * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
  */
 class Widget extends \yii\base\Widget
 {
-
 	/**
-	 * @var bool whether to register the asset
+	 * @var boolean whether to use the responsive version of Bootstrap.
 	 */
 	public static $responsive = true;
 
@@ -29,95 +30,75 @@ class Widget extends \yii\base\Widget
 	 * @var array the HTML attributes for the widget container tag.
 	 */
 	public $options = array();
-
 	/**
-	 * Initializes the widget.
+	 * @var array the options for the underlying Bootstrap JS plugin.
+	 * Please refer to the corresponding Bootstrap plugin Web page for possible options.
+	 * For example, [this page](http://twitter.github.io/bootstrap/javascript.html#modals) shows
+	 * how to use the "Modal" plugin and the supported options (e.g. "remote").
 	 */
-	public function init()
-	{
-		// ensure bundle
-		$this->registerBundle(static::$responsive);
-	}
-
+	public $pluginOptions = array();
 	/**
-	 * Registers plugin events with the API.
-	 * @param string $selector the CSS selector.
-	 * @param string[] $events  the JavaScript event configuration (name=>handler).
-	 * @return boolean whether the events were registered.
-	 * @todo To be discussed
+	 * @var array the event handlers for the underlying Bootstrap JS plugin.
+	 * Please refer to the corresponding Bootstrap plugin Web page for possible events.
+	 * For example, [this page](http://twitter.github.io/bootstrap/javascript.html#modals) shows
+	 * how to use the "Modal" plugin and the supported events (e.g. "shown").
 	 */
-	protected function registerEvents($selector, $events = array())
-	{
-		if (empty($events))
-			return;
-
-		$script = '';
-		foreach ($events as $name => $handler) {
-			$handler = ($handler instanceof JsExpression)
-				? $handler
-				: new JsExpression($handler);
+	public $pluginEvents = array();
 
-			$script .= ";jQuery('{$selector}').on('{$name}', {$handler});";
-		}
-		if (!empty($script))
-			$this->view->registerJs($script);
-	}
 
 	/**
-	 * Registers a specific Bootstrap plugin using the given selector and options.
-	 *
-	 * @param string $name the name of the javascript widget to initialize
-	 * @param array $options the Javascript options for the plugin
+	 * Initializes the widget.
+	 * This method will register the bootstrap asset bundle. If you override this method,
+	 * make sure you call the parent implementation first.
 	 */
-	public function registerPlugin($name, $options = array())
+	public function init()
 	{
-		$selector = '#' . ArrayHelper::getValue($this->options, 'id');
-		$options = !empty($options) ? Json::encode($options) : '';
-		$script = ";jQuery('{$selector}').{$name}({$options});";
-		$this->view->registerJs($script);
+		parent::init();
+		if (!isset($this->options['id'])) {
+			$this->options['id'] = $this->getId();
+		}
 	}
 
 	/**
-	 * Registers bootstrap bundle
-	 * @param bool $responsive
+	 * Registers a specific Bootstrap plugin and the related events
+	 * @param string $name the name of the Bootstrap plugin
 	 */
-	public function registerBundle($responsive = false)
+	protected function registerPlugin($name)
 	{
-		$bundle = $responsive ? 'yii/bootstrap-responsive' : 'yii/bootstrap';
-		$this->view->registerAssetBundle($bundle);
-	}
+		$id = $this->options['id'];
+		$view = $this->getView();
 
+		$bundle = static::$responsive ? 'yii/bootstrap-responsive' : 'yii/bootstrap';
+		$view->registerAssetBundle($bundle);
 
-	/**
-	 * Adds a new class to options. If the class key does not exists, it will create one, if it exists it will append
-	 * the value and also makes sure the uniqueness of them.
-	 *
-	 * @param string $class
-	 * @return array
-	 */
-	protected function addClassName($class)
-	{
-		if (isset($this->options['class'])) {
-			if (!is_array($this->options['class']))
-				$this->options['class'] = explode(' ', $this->options['class']);
-			$this->options['class'][] = $class;
-			$this->options['class'] = array_unique($this->options['class']);
-			$this->options['class'] = implode(' ', $this->options['class']);
-		} else
-			$this->options['class'] = $class;
-		return $this->options;
+		if ($this->pluginOptions !== false) {
+			$options = empty($this->pluginOptions) ? '' : Json::encode($this->pluginOptions);
+			$js = "jQuery('#$id').$name($options);";
+			$view->registerJs($js);
+		}
+
+		if (!empty($this->pluginEvents)) {
+			$js = array();
+			foreach ($this->pluginEvents as $event => $handler) {
+				$js[] = "jQuery('#$id').on('$event', $handler);";
+			}
+			$view->registerJs(implode("\n", $js));
+		}
 	}
 
 	/**
-	 * Sets the default value for an item if not set.
-	 * @param string $key the name of the item.
-	 * @param mixed $value the default value.
-	 * @return array
+	 * Adds a CSS class to the specified options.
+	 * This method will ensure that the CSS class is unique and the "class" option is properly formatted.
+	 * @param array $options the options to be modified.
+	 * @param string $class the CSS class to be added
 	 */
-	protected function defaultOption($key, $value)
+	protected function addCssClass(&$options, $class)
 	{
-		if (!isset($this->options[$key]))
-			$this->options[$key] = $value;
-		return $this->options;
+		if (isset($options['class'])) {
+			$classes = preg_split('/\s+/', $options['class'] . ' ' . $class, -1, PREG_SPLIT_NO_EMPTY);
+			$options['class'] = implode(' ', array_unique($classes));
+		} else {
+			$options['class'] = $class;
+		}
 	}
-}
\ No newline at end of file
+}
diff --git a/yii/composer.json b/yii/composer.json
index eb4c734..c8c0dd3 100644
--- a/yii/composer.json
+++ b/yii/composer.json
@@ -64,10 +64,14 @@
 		"source": "https://github.com/yiisoft/yii2"
 	},
 	"require": {
-		"php": ">=5.3.0",
-		"michelf/php-markdown": "1.3",
-		"twig/twig": "1.12.*",
-		"smarty/smarty": "3.1.*",
-		"ezyang/htmlpurifier": "v4.5.0"
+		"php": ">=5.3.11",
+		"ext-mbstring": "*",
+		"lib-pcre": "*"
+	},
+	"suggest": {
+		"michelf/php-markdown": "Required for Markdown helper.",
+		"twig/twig": "Required for TwigViewRenderer.",
+		"smarty/smarty": "Required for SmartyViewRenderer.",
+		"ezyang/htmlpurifier": "Required for Purifier helper."
 	}
 }
diff --git a/yii/requirements/YiiRequirementChecker.php b/yii/requirements/YiiRequirementChecker.php
index 03413d1..160a5db 100644
--- a/yii/requirements/YiiRequirementChecker.php
+++ b/yii/requirements/YiiRequirementChecker.php
@@ -16,7 +16,7 @@ if (version_compare(PHP_VERSION, '4.3', '<')) {
  *
  * Example:
  *
- * ~~~
+ * ~~~php
  * require_once('path/to/YiiRequirementChecker.php');
  * $requirementsChecker = new YiiRequirementChecker();
  * $requirements = array(
@@ -62,7 +62,7 @@ class YiiRequirementChecker
 	 * If a string, it is treated as the path of the file, which contains the requirements;
 	 * @return YiiRequirementChecker self instance.
 	 */
-	function check($requirements)
+	public function check($requirements)
 	{
 		if (is_string($requirements)) {
 			$requirements = require($requirements);
@@ -132,7 +132,7 @@ class YiiRequirementChecker
 	 * )
 	 * </code>
 	 */
-	function getResult()
+	public function getResult()
 	{
 		if (isset($this->result)) {
 			return $this->result;
@@ -145,7 +145,7 @@ class YiiRequirementChecker
 	 * Renders the requirements check result.
 	 * The output will vary depending is a script running from web or from console.
 	 */
-	function render()
+	public function render()
 	{
 		if (!isset($this->result)) {
 			$this->usageError('Nothing to render!');
@@ -166,7 +166,7 @@ class YiiRequirementChecker
 	 * @param string $compare comparison operator, by default '>='
 	 * @return boolean if PHP extension version matches.
 	 */
-	function checkPhpExtensionVersion($extensionName, $version, $compare = '>=')
+	public function checkPhpExtensionVersion($extensionName, $version, $compare = '>=')
 	{
 		if (!extension_loaded($extensionName)) {
 			return false;
@@ -183,7 +183,7 @@ class YiiRequirementChecker
 	 * @param string $name configuration option name.
 	 * @return boolean option is on.
 	 */
-	function checkPhpIniOn($name)
+	public function checkPhpIniOn($name)
 	{
 		$value = ini_get($name);
 		if (empty($value)) {
@@ -197,7 +197,7 @@ class YiiRequirementChecker
 	 * @param string $name configuration option name.
 	 * @return boolean option is off.
 	 */
-	function checkPhpIniOff($name)
+	public function checkPhpIniOff($name)
 	{
 		$value = ini_get($name);
 		if (empty($value)) {
@@ -214,7 +214,7 @@ class YiiRequirementChecker
 	 * @param string $compare comparison operator, by default '>='.
 	 * @return boolean comparison result.
 	 */
-	function compareByteSize($a, $b, $compare = '>=')
+	public function compareByteSize($a, $b, $compare = '>=')
 	{
 		$compareExpression = '(' . $this->getByteSize($a) . $compare . $this->getByteSize($b) . ')';
 		return $this->evaluateExpression($compareExpression);
@@ -226,7 +226,7 @@ class YiiRequirementChecker
 	 * @param string $verboseSize verbose size representation.
 	 * @return integer actual size in bytes.
 	 */
-	function getByteSize($verboseSize)
+	public function getByteSize($verboseSize)
 	{
 		if (empty($verboseSize)) {
 			return 0;
@@ -265,7 +265,7 @@ class YiiRequirementChecker
 	 * @param string|null $max verbose file size maximum required value, pass null to skip maximum check.
 	 * @return boolean success.
 	 */
-	function checkUploadMaxFileSize($min = null, $max = null)
+	public function checkUploadMaxFileSize($min = null, $max = null)
 	{
 		$postMaxSize = ini_get('post_max_size');
 		$uploadMaxFileSize = ini_get('upload_max_filesize');
@@ -292,7 +292,7 @@ class YiiRequirementChecker
 	 * @param boolean $_return_ whether the rendering result should be returned as a string
 	 * @return string the rendering result. Null if the rendering result is not required.
 	 */
-	function renderViewFile($_viewFile_, $_data_ = null, $_return_ = false)
+	public function renderViewFile($_viewFile_, $_data_ = null, $_return_ = false)
 	{
 		// we use special variable names here to avoid conflict when extracting data
 		if (is_array($_data_)) {
@@ -316,7 +316,7 @@ class YiiRequirementChecker
 	 * @param int $requirementKey requirement key in the list.
 	 * @return array normalized requirement.
 	 */
-	function normalizeRequirement($requirement, $requirementKey = 0)
+	public function normalizeRequirement($requirement, $requirementKey = 0)
 	{
 		if (!is_array($requirement)) {
 			$this->usageError('Requirement must be an array!');
@@ -354,7 +354,7 @@ class YiiRequirementChecker
 	 * This method will then terminate the execution of the current application.
 	 * @param string $message the error message
 	 */
-	function usageError($message)
+	public function usageError($message)
 	{
 		echo "Error: $message\n\n";
 		exit(1);
@@ -365,7 +365,7 @@ class YiiRequirementChecker
 	 * @param string $expression a PHP expression to be evaluated.
 	 * @return mixed the expression result.
 	 */
-	function evaluateExpression($expression)
+	public function evaluateExpression($expression)
 	{
 		return eval('return ' . $expression . ';');
 	}
@@ -374,7 +374,7 @@ class YiiRequirementChecker
 	 * Returns the server information.
 	 * @return string server information.
 	 */
-	function getServerInfo()
+	public function getServerInfo()
 	{
 		$info = isset($_SERVER['SERVER_SOFTWARE']) ? $_SERVER['SERVER_SOFTWARE'] : '';
 		return $info;
@@ -384,7 +384,7 @@ class YiiRequirementChecker
 	 * Returns the now date if possible in string representation.
 	 * @return string now date.
 	 */
-	function getNowDate()
+	public function getNowDate()
 	{
 		$nowDate = @strftime('%Y-%m-%d %H:%M', time());
 		return $nowDate;
diff --git a/yii/requirements/requirements.php b/yii/requirements/requirements.php
index a703fde..846eafc 100644
--- a/yii/requirements/requirements.php
+++ b/yii/requirements/requirements.php
@@ -1,7 +1,9 @@
 <?php
 /**
- * This is the Yii core requirements for the [[YiiRequirementChecker]] instance.
+ * These are the Yii core requirements for the [[YiiRequirementChecker]] instance.
  * These requirements are mandatory for any Yii application.
+ *
+ * @var $this YiiRequirementChecker
  */
 return array(
 	array(
@@ -36,4 +38,11 @@ return array(
 		'by' => '<a href="http://www.php.net/manual/en/book.mbstring.php">Multibyte string</a> processing',
 		'memo' => 'Required for multibyte encoding string processing.'
 	),
+	array(
+		'name' => 'Intl extension',
+		'mandatory' => false,
+		'condition' => $this->checkPhpExtensionVersion('intl', '1.0.2'),
+		'by' => '<a href="http://www.php.net/manual/en/book.intl.php">Internationalization</a> support',
+		'memo' => 'PHP Intl extension 1.0.2 or higher is required when you want to use <abbr title="Internationalized domain names">IDN</abbr>-feature of EmailValidator or UrlValidator.'
+	),
 );
\ No newline at end of file
diff --git a/yii/requirements/views/web/index.php b/yii/requirements/views/web/index.php
index 2f8da15..6cd2594 100644
--- a/yii/requirements/views/web/index.php
+++ b/yii/requirements/views/web/index.php
@@ -8,7 +8,7 @@
 <head>
 	<meta charset="utf-8"/>
 	<title>Yii Application Requirement Checker</title>
-	<?php $this->renderViewFile(dirname(__FILE__).DIRECTORY_SEPARATOR.'css.php'); ?>
+	<?php $this->renderViewFile(dirname(__FILE__) . '/css.php'); ?>
 </head>
 <body>
 <div class="container">
@@ -25,14 +25,26 @@
 		It checks if the server is running the right version of PHP,
 		if appropriate PHP extensions have been loaded, and if php.ini file settings are correct.
 		</p>
+		<p>
+		There are two kinds of requirements being checked. Mandatory requirements are those that have to be met
+		to allow Yii to work as expected. There are also some optional requirements beeing checked which will
+		show you a warning when they do not meet. You can use Yii framework without them but some specific
+		functionality may be not available in this case.
+		</p>
 
 		<h3>Conclusion</h3>
-		<?php if ($summary['errors']>0): ?>
-		<strong class="text-error">Unfortunately your server configuration does not satisfy the requirements by this application.</strong>
-		<?php elseif ($summary['warnings']>0): ?>
-		<strong class="text-warning">Your server configuration satisfies the minimum requirements by this application. Please pay attention to the warnings listed below if your application will use the corresponding features.</strong>
+		<?php if ($summary['errors'] > 0): ?>
+			<div class="alert alert-error">
+				<strong>Unfortunately your server configuration does not satisfy the requirements by this application.<br>Please refer to the table below for detailed explanation.</strong>
+			</div>
+		<?php elseif ($summary['warnings'] > 0): ?>
+			<div class="alert alert-info">
+				<strong>Your server configuration satisfies the minimum requirements by this application.<br>Please pay attention to the warnings listed below and check if your application will use the corresponding features.</strong>
+			</div>
 		<?php else: ?>
-		<strong class="text-success">Congratulations! Your server configuration satisfies all requirements.</strong>
+			<div class="alert alert-success">
+				<strong>Congratulations! Your server configuration satisfies all requirements.</strong>
+			</div>
 		<?php endif; ?>
 
 		<h3>Details</h3>
@@ -62,7 +74,7 @@
 	<hr>
 
 	<div class="footer">
-		<p>Server: <?php echo $this->getServerInfo().' '.$this->getNowDate(); ?></p>
+		<p>Server: <?php echo $this->getServerInfo() . ' ' . $this->getNowDate(); ?></p>
 		<p>Powered by <a href="http://www.yiiframework.com/" rel="external">Yii Framework</a></p>
 	</div>
 </div>
diff --git a/yii/web/Request.php b/yii/web/Request.php
index 2f4568a..5cd6912 100644
--- a/yii/web/Request.php
+++ b/yii/web/Request.php
@@ -533,7 +533,8 @@ class Request extends \yii\base\Request
 	 */
 	public function getIsSecureConnection()
 	{
-		return !empty($_SERVER['HTTPS']) && strcasecmp($_SERVER['HTTPS'], 'off');
+		return isset($_SERVER['HTTPS']) && strcasecmp($_SERVER['HTTPS'], 'off')
+			|| isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO']==='https';
 	}
 
 	/**
diff --git a/yii/web/Response.php b/yii/web/Response.php
index 954c999..d37c66a 100644
--- a/yii/web/Response.php
+++ b/yii/web/Response.php
@@ -15,6 +15,7 @@ use yii\helpers\StringHelper;
 
 /**
  * @author Qiang Xue <qiang.xue@gmail.com>
+ * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
  */
 class Response extends \yii\base\Response
@@ -50,7 +51,7 @@ class Response extends \yii\base\Response
 
 		if (isset($_SERVER['HTTP_RANGE'])) {
 			// client sent us a multibyte range, can not hold this one for now
-			if (strpos(',', $_SERVER['HTTP_RANGE']) !== false) {
+			if (strpos($_SERVER['HTTP_RANGE'],',') !== false) {
 				header("Content-Range: bytes $contentStart-$contentEnd/$fileSize");
 				throw new HttpException(416, 'Requested Range Not Satisfiable');
 			}
@@ -63,14 +64,18 @@ class Response extends \yii\base\Response
 			} else {
 				$range = explode('-', $range);
 				$contentStart = $range[0];
-				$contentEnd = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $fileSize - 1;
+
+				// check if the last-byte-pos presents in header
+				if ((isset($range[1]) && is_numeric($range[1]))) {
+					$contentEnd = $range[1];
+				}
 			}
 
 			/* Check the range and make sure it's treated according to the specs.
 			 * http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
 			 */
 			// End bytes can not be larger than $end.
-			$contentEnd = ($contentEnd > $fileSize) ? $fileSize : $contentEnd;
+			$contentEnd = ($contentEnd > $fileSize) ? $fileSize -1 : $contentEnd;
 
 			// Validate the requested range and return an error if it's not correct.
 			$wrongContentStart = ($contentStart > $contentEnd || $contentStart > $fileSize - 1 || $contentStart < 0);