relax SVN archive

The object_to_xml() function will now convert the float parts to IEEE-754 byte arrays, and the None
parts will be stored as None in the <ieee_754_byte_array> list node. The matching xml_to_object()
method has also been modified to read in this new node format. This affects the results.write and
state.save user functions (as well as the results.read and state.load user functions).