Updating to Rails 4.1.rb

1. Was receiving this strange error:
undefined method 'action_view' for #<Rails::Railtie::Configuration...
Had to add this to the top of `config/application.rb`:
    require "action_view/railtie"
    
2. ActionMailer URL host config not being setup correctly:

    config.action_mailer.default_url_options = {host: "s.caliper.io"}

    Rails.application.config.action_mailer.default_url_options
    => {:host=>"s.caliper.io"}
    
    ActionMailer::Base.default_url_options
    => {}