Creates a new <tt>ClassLoader</tt> that loads classes of the specified namespace from the specified include path.
If no include path is given, the ClassLoader relies on the PHP include_path. If neither a namespace nor an include path is given, the ClassLoader will be responsible for loading all classes, thereby relying on the PHP include_path.
string $ns The namespace of the classes to load.:
string $includePath The base include path to use.:
public function __construct($ns = null, $includePath = null) {
$this->namespace = $ns;
$this->includePath = $includePath;
}