setup MySQL database
+ created example YAML configuration
>$ curl "https://gist.github.com/TheEricMiller/5390682/raw" -o "config/~database.example.yml"
>$ cp -f config/~database.example.yml config/database.yml
> edit config/database.yml

+ Gemfile ~ gem 'mysql2'
>$ bundle
>$ rake db:create
setup action_mailer with figaro
> update config/application.rb
	~ https://gist.github.com/TheEricMiller/5401698/
> uncomment config/env/production.rb "config.action_mailer.raise_delivery_errors = false"
setup Staging environment
>$ cp config/environments/production.rb config/environments/staging.rb
> uncomment "config.log_level = :debug"
> update Gemfile >> "group :production, :staging do"
> update config/application.yml
> update config/database.yml (if needed / not for Heroku)