Allows to load RailsConfig manually

[Antiarchitect]

Allows to load RailsConfig manually and even before app configuration process (e.g. inside config/application.rb):

module Appname
  class Application < Rails::Application

    Bundler.require(*Rails.groups)
    RailsConfig::Integration::Rails::Railtie.preload

    ...

    config.time_zone = Settings.time_zone

    ...

   end
end

refers to #106

[fredwu]

Neat!