Added lib, lib-server demo

- Added lib with server, http, wsgi actors from demos/server.py
- Made the server, http, wsgi configurable! You should now be able to
  run almost any app with quite ease, see lib-server.py
- Added demos/lib-server.py
- Fixed issue with socket.listen() in demos/server.py
Merge pull request #25 from joar/xudd-lib

Added lib with server, http, wsgi actors