Accordion breaks transcluded scope inheritance when used as a part of template of directive that has isolated scope.

If I have a directive (with transclude true) that has accordion in it's template then the transcluded scope of that directive does no longer inherit from outside scope (via `__proto__`, it's still accessible via `$parent`). It happens only if my directive has isolated scope.

http://jsfiddle.net/Z48WQ/2/
