Add TOR

[ghost]

Using the TOR network, you can setup Hidden Services which are bound to hosts which are in NAT restricted networks, example:

- Alice sets up a hidden service (called aliceshiddenservice.onion), which is bound to 192.168.1.2 (Alice's SSH server, which is only accessible from the local network)
- Bob will then connect to "aliceshiddenservice.onion" using software such as PuTTy with the TOR proxy (needed for the DNS lookups), which in turn will connect Bob to Alice's SSH server
- No port forwarding needed, and can be perfectly hosted on a small raspberry pi