Log Message:
Update to 3.4.2:

3.4.2 (2015-02-07)
==================

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

* LP#1415907: Crash when creating an XMLSchema from a non-root element
  of an XML document.

* LP#1369362: HTML cleaning failed when hitting processing instructions
  with pseudo-attributes.

* ``CDATA()`` wrapped content was rejected for tail text.

* CDATA sections were not serialised as tail text of the top-level element.