Disable file cache driver

common/framework/drivers/cache/dummy.php

@@ -22,6 +22,16 @@ class Dummy extends File implements \Rhymix\Framework\Drivers\CacheInterface
 	 */
 	public $data = array();
 	
+	/**
+	 * Override the isSupported() method of the file driver.
+	 * 
+	 * @return bool
+	 */
+	public static function isSupported()
+	{
+		return true;
+	}
+	
 	/**
 	 * Get the value of a key.
 	 *