PR: moving migrations and adding gulp migration command fixes #34

To clear up migrations, these for now will be used for seeding data into the development data base, we can also use it for applying changes to existing data in production e.g. if we need to add or remove attributes on a schema. Currently they only run on development **pending production config *** when we start to use them for production we can flag changes that are dev only by checking the env. Any questions? we can chat on here or on hipchat. Think of them as the same as what we had on RSQE with the 'gradle applyDBupdates'