Icalendar

-------------------

Bug fixes:

- Don't break on parameter values which contain equal signs, e.g. base64 encoded
binary data [geier]

- Fix handling of VTIMEZONEs with subcomponents with the same DTSTARTs.
[geier]

-------------------

Bug fixes:

- Removed ``setuptools`` as a dependency as it was only required by setup.py
and not by the package.

- Don't split content lines on the unicode ``LINE SEPARATOR`` character
``\u2028`` but only on ``CRLF`` or ``LF``.

-------------------

Bug fixes:

- Run tests with python 3.5 and 3.6.
[geier]

- Allow tests failing with pypy3 on travis.ci.
[geier]

-------------------

Bug fixes:

- Encode error message before adding it to the stack of collected error messages.

-----------------

Fixes:

- Successfully test with pypy and pypy3. [gforcada]

- Minor documentation update. [tpltnt]

-----------------

New:

- Updated components description to better comply with RFC 5545.
Refs 183.
[stlaz]

- Added PERIOD value type to date types.
Also fixes incompatibilities described in 184.
Refs 189.
[stlaz]

Fixes:

- Fix testsuite for use with ``dateutil>=2.5``.
Refs 195.
[untitaker]

- Reintroduce cal.Component.is_broken that was removed with 3.9.2.
Refs 185.
[geier]