See https://rails.lighthouseapp.com/projects/16213/tickets/23-rails-i18

    Example: ActiveSupport::JSON.backend = "JSONGem"

  All internal Rails JSON encoding is now handled by ActiveSupport::JSON.encode().  Use of #to_json is not recommended, as it may clash with other libraries that overwrite it.  However, you can recover Rails specific functionality
  if you really want to use #to_json.

    gem 'json'
    ActiveSupport::JSON.backend = "JSONGem"

    class ActiveRecord::Base
      alias to_json rails_to_json
    end

  * Decouple from ActionController and ActionMailer
  * Bring back localization support.
  * Prepare to decouple templates from the filesystem.
  * Prepare to decouple localization from ActionView
  * Fix ActionMailer to take advantage of ActionView::Path

Conflicts:
	activesupport/lib/active_support.rb

hasn't.

Also change the assert reference to be more consistent with the rest
of the documentation.

Reinstate Base#render_to_string. Introduce AbstractController#render_to_string which stringifies render_to_body.

Update ActionMailer guide's '2.3 Complete List of Action Mailer User-Settable Attributes' to show that the attribute 'cc' and 'bcc' can take a string or an Array of strings.

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>