Implementing Sessions between sockect.io server and passport / connect sessions, WIP:
- Implement socket.io "authorization" event
- Add dependencies 'express-session', 'cookie', and 'uid2'
- http tests:
  - implement get_session() function to get or create session from socket.io handshake
  most inspired by express-session with which compatibility is required if sessions are
  Connect / Express sessions
  - provide passport.js with session options, including a session store
  - provide passport.js with base url
  - increment a client view counter for testing whenever a socket.io client is created
  - plenty of traces for better understanding
- passport tests:
  - use session_options from exported function
  - use __base url from exported function