- [pull 524] Fix angles being escaped in style blocks (issue 523)
- [pull 527] Fix base64 images being corrupted in safe mode (issue 526)
- [pull 529] Add `breaks` extra with ability to hard break on backslashes (issue 525)
- [pull 532] Fix 493 persisting when `code-friendly` extra enabled
- [pull 535] Update `_slugify` to use utf-8 encoding (issue 534)
- [pull 536] Maintain order of appearance in footnotes
- [pull 538] Include HTML headers in TOC
- [pull 540] Add mechanism to prevent header ID counter resetting (issue 530)