Add course model and relation to students with rake tasks

* Add foreigner gem to enable foreign keys in the db
* Update session hack to use full company name
* Add courses
* Update admin service to include "South Bay Dance Center" company id
* Add time_only format to the rails environment
* update secrets to include dev admin user
* Add course and student many-to-many tables
* Update seeds to have a default company otherwise app will not work
* Add CreateCompanyService
* Add class cvs with parser for rake task
* Rename rake task to somthing more generic