Update to 3.4:

3.4 (2013-04-24)
----------------

- Switch to unicode internally. This should fix all en/decoding errors.
  [thet]

- Support for non-ascii parameter values. Fixes #88.
  [warvariuc]

- Added functions to transform chars in string with '\\' + any of r'\,;:' chars
  into '%{:02X}' form to avoid splitting on chars escaped with '\\'.
  [warvariuc]

- Allow seconds in vUTCOffset properties. Fixes #55.
  [thet]

- Let ``Component.decode`` better handle vRecur and vDDDLists properties.
  Fixes #70.
  [thet]

- Don't let ``Component.add`` re-encode already encoded values. This simplifies
  the API, since there is no need explicitly pass ``encode=False``. Fixes #82.
  [thet]

- Rename tzinfo_from_dt to tzid_from_dt, which is what it does.
  [thet]

- More support for dateutil parsed tzinfo objects. Fixes #89.
  [leo-naeka]

- Remove python-dateutil version fix at all. Current python-dateutil has Py3
  and Py2 compatibility.
  [thet]

- Declare the required python-dateutil dependency in setup.py. Fixes #90.
  [kleink]

- Raise test coverage.
  [thet]

- Remove interfaces module, as it is unused.
  [thet]

- Remove ``test_doctests.py``, test suite already created properly in
  ``test_icalendar.py``.
  [rnix]

- Transformed doctests into unittests, Test fixes and cleanup.
  [warvariuc]

(wiz)