* New upstream version. - Features added: * lxml.html.tostring() gained new serialisation options ``with_tail`` and ``doctype``. - Bugs fixed: * Crash when merging text nodes in ``element.remove()``. * Crash in sax/target parser when reporting empty doctype. * Crash when building an nsmap (Element property) with empty namespace URIs. * Crash due to race condition when errors (or user messages) occur during threaded XSLT processing. * XSLT stylesheet compilation could ignore compilation errors. * Fixed a crash when using ``iterparse()`` for HTML parsing and requesting start events. * Fixed parsing of more selectors in cssselect. Whitespace before pseudo-elements and pseudo-classes is significant as it is a descendant combinator. * lxml.html.diff no longer raises an exception when hitting 'img' tags without 'src' attribute.