Added doc.

framework/web/AssetBundle.php

@@ -85,6 +85,11 @@ class AssetBundle extends Object
 	 * @var array list of the bundle names that this bundle depends on
 	 */
 	public $depends = array();
+	/**
+	 * @var array the options to be passed to [[AssetManager::publish()]] when the asset bundle
+	 * is being published.
+	 */
+	public $publishOption = array();
 
 	/**
 	 * Initializes the bundle.
@@ -114,7 +119,7 @@ class AssetBundle extends Object
 		}
 
 		if ($this->sourcePath !== null) {
-			list ($this->basePath, $this->baseUrl) = $am->publish($this->sourcePath);
+			list ($this->basePath, $this->baseUrl) = $am->publish($this->sourcePath, $this->publishOption);
 		}
 
 		foreach ($this->js as $js => $options) {

framework/web/AssetManager.php

@@ -164,6 +164,10 @@ class AssetManager extends Component
 	 * Note, in case $forceCopy is false the method only checks the existence of the target
 	 * directory to avoid repetitive copying (which is very expensive).
 	 *
+	 * By default, when publishing a directory, subdirectories and files whose name starts with a dot "."
+	 * will NOT be published. If you want to change this behavior, you may specify the "beforeCopy" option
+	 * as explained in the `$options` parameter.
+	 *
 	 * Note: On rare scenario, a race condition can develop that will lead to a
 	 * one-time-manifestation of a non-critical problem in the creation of the directory
 	 * that holds the published assets. This problem can be avoided altogether by 'requesting'