Add tornado parameters.
Update Vagrantfile.

The vagrant configuration now relies less on chef and starts the tornado
versions of the processes rather than flask.
Remove chef directory.

I've reduced the vagrant chef ties to the bare minimum (for now) and
inlined the attributes required to get a working environment started by
vagrant up.

I've also removed the berksfile dependency on the margarine cookbook as
a result and updated the vagrantfile so that we no longer deploy
margarine with chef (much faster this way).