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• Create manual implementation of the SSDP Discover function, to allow specifying a TTL of 4 (the recommended by the DLNA specification)

• Add new optional parameter for specifying the streaming port: -P or --port. Thanks to @improve100 for reporting an issue which inspired this idea.
• Ignores a device that returns an error while discovering devices. Thanks to @whitemay for reporting the bug and even proposing the code change.

• Use an external crate (local-ip-address) to make better identification of the local IP address to host the streaming.
• The function get_serve_ip was renamed to get_local_ip to reflect better what it is doing.

Initial release.