Autobuild

Hi, 
I've added a makefile to build automatically all the deps for your module.

Typing ```make``` it downloads the last libjingle (I guess it should be more correct to fix a specific revision), compiles all the modules, installs node-gyp and compiles the add-on.

I've also added some new deps in package.json just to download mocha and chai, I've added the mac deps in binding.gyp and i've fixed a little issue in the order of the linux deps (on my ubuntu machine it doesn't find the X11 library if it is linked as first item).

That's all. If this works, once you have accepted the pull request, I proceed with the testing part.