Removing quoting.rb, upgrade to 2.1.3.6, changing all utf-8 references to UTF-8, updating tests where incorrect encoding

Improve performance of the rendering stack by freezing formats as a sign that they shouldn't be further modified.

Allow anything that responds to render to be given as :template and use find_template instead of find in views.

Delegated ActionMailer::Base.deliveries to Mail.deliveries, added callback support in Mail to call ActionMailer on delivery, moved deliver to deprecated API in preparation for new API

Updating deprecated API to sanitize old style attachments hash to work with new mail.attachments method