Removed Twisted logging

Disabled logging from twisted modules as a
random error message was occuring related to
writing to a listening socket
Improved performance of test discovery

PythonNose test discovery has been improved by
only using the same amount of processes as cores
exists and each process keeps processing files
until the queue is empty or a problem occurs.

If a process dies it is replaced with a new process.

Discovery is now 65% faster than before