API Convert::html2raw no longer wraps text automatically
BUG Convert::html2raw now correctly decodes single quotes
API Mailer can be configured to use different encoding mechanisms, and added support for unicode quoted-string encoding
API Mailer bounce email can now be configured
API Mailer no longer calls Convert::xml2raw on all email subjects
API Deprecate dead Mailer code and refactored duplicate or mis-documented code.
Merge pull request #3507 from tractorcow/pulls/fix-mailer

API / FIX / Cleanup - Mailer and Convert::html2raw