Heroku Preflight

Getting ready to deploy to heroku

* Added a deploy task. It uses [parity](https://github.com/croaky/parity)'s staging and production git remote scheme to deploy to heroku easily
* Remove latent ActionMailer config (grr)
* Remove latent ActiveRecord config (grr)
* Removed an unused asset_host config
* Updated the rake gem because it was complaining

After I did all this, I was able to seamlessly deploy to heroku