Support including a phar from another phar
Support including a phar from another phar

The default stubs mess up when you try to run a phar which includes
another phar. In my case I was running pip.phar on the CLI, which
included app.php, which in turn included silex.phar.

It broke the __DIR__ calls. This was able to fix it.

Needs testing in lots of different setups, because the default stubs are
no longer used.

peterkokot/Silex,naderman/Silex,Tobion/Silex,CarsonF/Silex,GromNaN/Silex,stof/Silex,Seldaek/Silex,SpacePossum/Silex,cgsmith/Silex,akucherevskiy/developex_test,fhinkel/Silex,mTorres/Silex,Tobion/Silex,GromNaN/Silex,tcx1000/Silex,akucherevskiy/developex_test,jdreesen/Silex,silexphp/Silex,akucherevskiy/developex_test,JPry/Silex,GromNaN/Silex,SanderKnape/Silex,SpacePossum/Silex,RayRutjes/Silex,fabpot/Silex,gencer/Silex,mathroc/Silex,Incognito/silex-fork,plotek/Silex,lokhman/Silex,arduanov/Silex,Xephi/Silex,stof/Silex,jdreesen/Silex,peterkokot/Silex,naderman/Silex,Incognito/silex-fork,arduanov/Silex,mmauri04/Silex,beealone/Silex,CarsonF/Silex,tcx1000/Silex,mathroc/Silex,plotek/Silex,romainneutron/Silex,lyrixx/Silex,Tobion/Silex,romainneutron/Silex,Xephi/Silex,CarsonF/Silex,lyrixx/Silex,beealone/Silex,cesarmarinhorj/Silex,JPry/Silex,SanderKnape/Silex,lokhman/Silex,peterkokot/Silex,mmauri04/Silex,RayRutjes/Silex,mTorres/Silex,romainneutron/Silex,stof/Silex,Seldaek/Silex,fabpot/Silex,naderman/Silex,cesarmarinhorj/Silex,lyrixx/Silex,fhinkel/Silex,cgsmith/Silex