Create variables in Heroku which can be read from Ruby

[brennanMKE]

It would be better to remove these hard-coded values so they can be changed with settings in Heroku when it is deployed. I expect they would work like environment variables so running locally would simply define these variables when the app is started.

[jamescmartinez]

I'm closing due to the rewrite. All of that functionality can now be moved to the "officially supported" way.