debugger for js!

Hey guys,

This PR is for the debugger, it has only been tested on iOS so far, Surith will test it on Android. You need a patched version of Spidermonkey: you will need to apply `https://dl.dropbox.com/u/29043245/jsbindings.patch` on top of Ricardo's version of Spidermonkey in order to fix a bug that triggers when debugging.

Right now, I've only tested the debugger with MoonWarriors, but at least it works. If you need to know how to make it work, just send me an email or start a thread in the js list.

Enjoy!