python3.4 -V now returns on stdout while before it returns on stdout. It
breaks pyHLA version detection. Use standard PYTHON_VERSION_STRING from
FindPythonInterp.cmake to do the test instead.

Previously, it uses a d extension to mark debug libraries. It sounds
like a good idea, but the python caller are not ready for that. So,
well, just don't do smart things for debug libraries.

We now use a packaged version with a "version number" and not anymore a
CVS data. Fix required ABI to take this fact in consideration.

No changes expected.

py-hla is a python wrapper over CERTI to speak with HLA (High Level
Architecture).