Vagrant  migrations

Fixes #399 

Migrations weren't being run on the chef provision. Migrations were broken due to this commit https://github.com/python/pythondotorg/commit/a14a7d482a633014277200936c5a0bb64d2a7d65  a few days ago. I'm not clear why that change was made, but maybe @gutworth can say?

It seems the 0.12 line of tastypie drops support for django's less than 1.7 as `django.db.migrations` doesn't exist on non-1.7 versions afaik. Offending exception originates from [this line](https://github.com/toastdriven/django-tastypie/blob/master/tastypie/migrations/0001_initial.py#L4) of tastypie.