Update lib/jQuery/Chain.php
Update lib/jUI.php
Update lib/PathFinder.php
Update lib/PathFinder.php

Bug: directory separator was added to namespace path 2 times (in rows 266 and 276/281).
Fix: no more double directory separator adding.
Merge pull request #223 from DarkSide666/patch-18

PathFinder fix for add-ons with complex namespaces