Placing App Config outside enviroment files into YML.

Part of enviroment.rb

# Load application specific configuration
require 'ostruct'
AppConfig = OpenStruct.new(YAML.load_file('config/config.yml')[Rails.env])

Rails::Initializer.run do |config|

  # Sessions
  config.action_controller.session_store = :active_record_store
  config.action_controller.session = {
    :session_key => AppConfig.session_key,
    :secret      => AppConfig.secret,
    :session_domain  => AppConfig.session_domain
  }
  
end