corrected some errors

using Croogo 1.5.4 
After installation and activate the plugin, some errors shown

Notice (8): Trying to get property of non-object [APP\Plugin\Taxonomy\Controller\Component\TaxonomiesComponent.php, line 111]

change

var $uses = array('Node');

to

public $uses = array('Nodes.Node');

Strict (2048): Only variables should be assigned by reference [APP\Plugin\Sitemap\Controller\SitemapController.php, line 36]


change

$settings = & ClassRegistry::init('Setting');

to

$settings = ClassRegistry::init('Setting');