Rendezvous 6 based rvpython - beta release

A first release for rvpython for TIB/Rendezvous 6 has been entered into the CVS repository.
It's a complete rewrite of the module, based on the rv6 C API, and with a 'thick' python layer.
The python layer exposes almost exactly the same API to python as the rv5 version, making it extremely easy to move existing programs to the new TIBRV release.
The C wrapper code is generated by swig (version 1.1p5).