UDP data sender/receiver

Reads, sends and transmits records consiting of 32-bit id and a UTF-8 string through UDP. Maximum record size is 508 bytes to ensure UDP packets are allowed anywhere. To run:

sudo apt install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev
cargo run

On NixOS shell.nix should provide all dependencies needed.