Allow the host, port and password to be specified on the command line

[thefinn93]

The current setup requires users to have a .cjdnsadmin file in their home directory. While this is generally not a problem and pretty standard for CJDNS related stuff, it'd be nice to be able to use --pass <password> to specify the CJDNS password. Also couldn't hurt to bring the rest of it to the command line as well, --host <host> and --port <port>. In the mean time, the README says you can do --pass, might wanna fix that