In this commit, we fix an issue where connections made through Tor's
SOCKS proxy would result in the remote address being the address of the
proxy itself
We fix this by using an internal proxyConn struct that sets the correct
address at the time of the connection.
In this commit, we clean up the tor package to better follow the
Effective Go guidelines. Most of the changes revolve around naming,
where we'd have things like `torsvc.TorDial`. This was simplified to
`tor.Dial` along with many others.
