Log Message:
Update to 3.4.3:

3.4.3 (2015-04-15)
==================

Bugs fixed
----------

* Expression cache in ElementPath was ignored.  Fix by Changaco.

* LP#1426868: Passing a default namespace and a prefixed namespace mapping
  as nsmap into ``xmlfile.element()`` raised a ``TypeError``.

* LP#1421927: DOCTYPE system URLs were incorrectly quoted when containing
  double quotes.  Patch by Olli Pottonen.

* LP#1419354: meta-redirect URLs were incorrectly processed by
  ``iterlinks()`` if preceded by whitespace.