==================
Features added
--------------
* GH89: lxml.html.clean allows overriding the set of attributes that it
considers 'safe'. Patch by Francis Devereux.
Bugs fixed
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* LP1104370: ``copy.copy(el.attrib)`` raised an exception. It now returns
a copy of the attributes as a plain Python dict.
* GH95: When used with namespace prefixes, the ``el.find*()`` methods
always used the first namespace mapping that was provided for each
path expression instead of using the one that was actually passed
in for the current run.
* LP1092521, GH91: Fix undefined C symbol in Python runtimes compiled
without threading support. Patch by Ulrich Seidl.
Other changes
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