Add a notice informing users that ports are not stripped

[Rooni]

As of now this package is broken for azure hosted applications (and probably others) and will always return the REMOTE_ADDR ip as fallback.

For python-ipware this does work properly.

If this won't be fixed in this package as stated here, please at least add a notice or warning somewhere that get_client_ip() won't return any ips that contain ports, or archive this repo in favor of python-ipware.

[Avid Coder]

fixed via: #106