Documentation:
 - http://docs.python.org/3.3/library/xml.etree.elementtree.html#xml.etree.ElementTree.Element.get
 - http://docs.python.org/3.3/library/xml.etree.elementtree.html#xml.etree.ElementTree.Element.iter

These two functions are documented with keyword arguments. Python implementation works correctly, but as of 3.3, _etreeelement module in C is hot-patching this module to enhance speed. C implementation only expects normal arguments for get and iter. This is what this patch fixes.

First patch so:
 - I am not sure about the "key" string in kwlist array, I followed code above and it doesn't work without it, so I guess it's to for the normal arg.
 - I am not sure about how to test iter with this. tag argument is never used.
 - Included a test that shows the problem.

Have a nice day,