fixing accidental test run due to name
Merge pull request #389 from joernhees/nosefix

fixing accidental test run due to name
New rules for special datatypes can now be specified for casting Python to XSD
Hexlify and unhexlify added for hexBinary
Fix Py3 bytes treated differently than Py2 basestring
In Python 3.2, make sure the value to unhexlify is a bytes not a str