added the order setting for resources

default order is 0
positive and negative orders are allowed
order is not affected by priority

example:
$acl->add(new Kwf_Acl_Resource_MenuUrl('bar',
                array('text'=> 'Bar', 'icon'=>'heart.png', 'order'=>1),
                '/admin/bar'));
Merge pull request #212 from yacon/master_resourceorder

added the order setting for resources