Python tcp tunnel over ssh

This script is useful when ssh tunneling is disabled on the remote server.
E.g. for use with python web-proxy server.

1. Copy the tunserver.py to remote server (e.g. via sftp)
2. Run `python tunnel.py remote-server-address 'python /path-to/tunserver.py target-host port'
3. Connect to local port 5080

(todo - make local port configurable and remote server port too)