Update bin/setup (#1933)
Update bin/setup (#1933)

* Switch phantomjs for chromedriver
* Stop trying to join the Heroku app
    - Heroku keep changing the way this command works and most public users
can't access it anyway.
* Drop requirement for Foreman
    - You don't need it, so don't push it.
thoughtbot/administrate,thoughtbot/administrate,thoughtbot/administrate,thoughtbot/administrate