[TxMt] PyMate and Python 3.0rc1

the version of PyMate in the svn repository doesn't work with Python 3.0rc1, as there have been major changes both to the language and to the standard library.

the diff file attached to this message describes the changes needed to make PyMate compatible with Python 3.0; it also migrates from the % string formatting operator to the new str.format function, as recommended by the Python 3.0 documentation.

sadly the changes are not backwards compatible (valid Python 2.x code is not necessarily valid Python 3.x code and vice versa), so some sorts of version check should be put in place -- I'll leave that to the senior mantainers of the bundle.

cheers,

domenico