- CLI `--book` convert all worksheets (fixes #701 h/t @pmelisko)
- Detect ";"-DSV with no "\t" or "," (fixes #875 h/t @sh977218)
- editable HTML uses spans for IE6+ compat (fixes #851 h/t @elogicmedia)
- XLSB formula structure parallels XLS (fixes #680 h/t @bstiel)