Py3port

here it is. it should still be tested in a daily-use-situation. superficially it's all okay.
there's just the Warning: ```WARN  03:49:07.899 void StatusNotifierItemFactory::connectToSnw() Invalid interface to SNW_SERVICE``` that i have no idea about.
and i haven't touched any of the Packaging which i guess is necessary, but it's no field of expertise to me.

i suggest to use Unittest in the future for testing and raise the test-coverage for the sake of maintenance and extensibility before the code grows and grows.