ssh_connect.py:  Added --logo-path option to allow specifying a custom path for the logo
ssh_connect.py:  Added --default-port option to specify the default connection port
ssh_connect.py:  Added --auth-only option to skip the connection info prompts and ask only for the credentials (user/password)
ssh_connect.py:  Added --default-host for consistency but kept old option --default_host for backwards compatibility
ssh_connect.py:  Added vim modeline comment at the end of the file to enforce code formatting
Merge pull request #298 from moises-silva/master

Added new options to ssh_connect.py courtesy of Moises Silva (thanks!):  `--logo-path`, `--default--port`, and `--auth-only`.  See the code or run `ssh_connect.py --help` for details on how to use them.