- Update to version 3.3.2:
- The properties resolvers and version, as well as the methods
set_element_class_lookup() and makeelement(), were lost from iterparse
objects.
- LP#1222132: instances of XMLSchema, Schematron and RelaxNG did not clear
their local error_log before running a validation.
- LP#1238500: lxml.doctestcompare mixed up "expected" and "actual" in
attribute values.
- Some file I/O tests were failing in MS-Windows due to incorrect temp file
usage. Initial patch by Gabi Davar.
- LP#910014: duplicate IDs in a document were not reported by DTD
validation.
- LP#1185332: tostring(method="html") did not use HTML serialisation
semantics for trailing tail text. Initial patch by Sylvain Viollon.
- LP#1281139: .attrib value of Comments lost its mutation methods in 3.3.0.
Even though it is empty and immutable, it should still provide the same
interface as that returned for Elements.

- Run tests during build (forwarded request 224393 from Nijel)