Here’s a js fiddle with working solution. You’re welcome. 🙂
http://jsfiddle.net/Eskel/g593q/6/
Update with only two render passes (credit to WestLangley):
http://jsfiddle.net/Eskel/g593q/9/
The pieces missing were these:
composer.renderTarget1.stencilBuffer = true
composer.renderTarget2.stencilBuffer = true
outline.clear = false