Add a step to create a root route

We (Tim the volunteer and I) discovered that rails 4.0 on heroku would throw an exception going to the index page if you did not have a root route defined. We considered two possibilities:

1) editing the routes file may be difficult for new users, but it solved the problem
2) leave the change within modifying the URL

However, having heroku open on an error page could be traumatic for new users. We chose option one which will assist new users in getting their app to work. 

We hope this makes it easier!