added more facades.

laravel/facade.php

@@ -6,6 +6,10 @@ abstract class Facade {
 	 * Magic Method for passing methods to a class registered in the IoC container.
 	 * This provides a convenient method of accessing functions on classes that
 	 * could not otherwise be accessed staticly.
+	 *
+	 * Facades allow Laravel to still have a high level of dependency injection
+	 * and testability while still accomodating the common desire to conveniently
+	 * use classes via static methods.
 	 */
 	public static function __callStatic($method, $parameters)
 	{