`PlanningProject` of it ever happens is the container where features stemmed from in the planning tool. E.g. with TP at Rockabox we have a number of projects, each of them with its user stories.

It may be that we do not need to track this and it's just a configuration thing for project and provider.

I was wondering because the `Project` model we have here is part of the features app, which seemed to be the domain of the planning provider. Maybe `Project` does not belong in `features` but in `accounts`.

Re: teams and projects - now projects are assigned to teams in a 1 team - many projects, but maybe this should be a many to many.