Added a certificate creation script, fixed an ugly placement of imports in worker.py
- Added support for discovering workers via UDP multicast
- Adapted netwoking to accept different ports - needed for discovery
- Added option to check the size of a Queue and to check if it's empty
- Fixed a comment in server.py
Added documentation for autodiscovery, Queue.size and Queue.empty
Merge pull request #27 from nidzo732/improvements

Added: automatic discovery of workers, Queue.size and Queue.empty