Scaffolding for the Symfony2 migration

Hi!

Here's the beginning for a Symfony2 migration using the [FOSFacebookBundle](https://github.com/FriendsOfSymfony/FOSFacebookBundle). It is just the scaffolding code, so don't get too excited (yet).

Next steps:

* Migrate the old models.
* Migrate the templates.

I'll see if I have some time to look into this after Christmas. 

I want to set up my own Continue-this-Story server somewhere :-)

Merry holidays!