Log Message:
Update to 5.0.6. Adds support for python-3.x.

Release 5.0.6 improves error messages in certain edge cases
Release 5.0.5 corrects a unicode-bug that still existed in writing files
Release 5.0.4 corrects a unicode-bug that still existed in reading files after
fixing lists of string in 5.0.3
Release 5.0.3 corrects errors related to the incorrectly handling unicode
encoding and writing out files
Release 5.0.2 adds a specific error message when trying to install on
Python versions older than 2.5
Release 5.0.1 fixes a regression with unicode conversion not happening
in certain cases PY2
Release 5.0.0 updates the supported Python versions to 2.6, 2.7, 3.2, 3.3
and is otherwise unchanged