Silex/Pimple support

[hkdobrev]

What do you think about supporting Silex or Pimple with Symfony components?

Things like Doctrine, Symfony forms, Swift mailer and others are integrated well in Pimple with Silex service providers. However, the Behat contexts require the Symfony kernel and dependency injection. Do you think things could be re-organised so it could support both? I think we could abstract in some way accessing the Doctrine entity manager and others needed parts relevant to specific contexts.