Removed references to the BBCodeParser module as it has been removed from SS4
> Removed TextParser and BBCodeParser. These are available in an archived module, silverstripe-archive/bbcodeparser
> We recommend that you update your code to make use of another BBCode parsing library.
API Implement enhanced pluralisation
Remove Zend_Translate and all Zend dependencies from i18n
Deprecated $context from i18n::_t()
Warn on missing default string for i18n::_t()
* API Replace existing Email and Mailer classes with SwiftMailer powered email system
* DOCS New Email docs
* Initial feedback from Damian
* Making Mailer an interface
* Templates relocated
* Round of feedback
* More robust approach to plain parts
* Revert changes to TestMailer
