Add a step to create a root route

We 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. 
2) 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.