- Improve foldline() performance. This improves the foldline performance, especially for large strings like base64-encoded inline attachements. In some cases (1MB string) from 7 Minutes to less than 20ms for ASCII data and 500ms for non-ASCII data. Ref: 163. [emfree]
3.9.0
------------------
- Creating timezone objects from VTIMEZONE components. [geier]
- Make ``python-dateutil`` a dependency. [geier]
- Made RRULE tolerant of trailing semicolons. [sleeper]
- Documentation fixes. [t-8ch, thet]
3.8.4
------------------
- Add missing BYWEEKNO to recurrence rules. [russkel]
3.8.3
------------------
- PERCENT property in VTODO renamed to PERCENT-COMPLETE, according to RFC5545. [thomascube]
- The representation of CaselessDicts in 3.8 changed the name attribute of Components and therefore broke the external API. This has been fixed. [untitaker]