Bootstrap barebone symfony

Hi,

Currently symfasize bootstraps applications using the standard edition of Symfony2.

I've seen many projects where the standard dependencies are kept, but not used.
Also I've seen some people stripping those unwanted dependencies right after the installation.
Finally, I've seen a few who create their own symfony edition ([see this packagist search](https://packagist.org/search/?q=symfony-edition)).

Wouldn't it be nice to bootstrap a "barebone" edition of symfony, and let the developers decide which dependencies to use?
It might increase the number of bundles to install, except if symfasize offers to pre-select some bundles to embed, or if it uses tools which ease the installation task (for instance [GnugatWizardBundle](https://github.com/gnugat/GnugatWizardBundle)).

What do you think?