OPW: First goal achieved

Some time ago I achieved the first and most important goal of my internship: all tests are now passing for Python 3 and the py33-gate is now voting. Since then, there were no problems with Python 3 for Marconi and hopefully it will remain so. The only missing dependency is python-memcached, that is used for caching and thus not totally blocking usage.

There were 7 commits merged in total:

with the last commit to make gate voting.

The overall impression from the work done: Python 3 is even more explicit, then Python 2.

The remaining time till August 18, I plan to spend doing several different activities: