Init scripts - to make the programs start automatically at boot.
If you are running a current Raspbian (Jessie or later) with systemd:
Copy the systemd/*.service files to the /etc/systemd/system/ directory, and then run
sudo systemctl daemon-reload
sudo systemctl enable hddledPi.service
sudo systemctl enable netledPi.service
If you are running an older Raspbian (Wheezy) with SysV init:
Copy the sysVinit/* files to the /etc/init.d/ directory, and then run
sudo update-rc.d enable hddledPi
sudo update-rc.d enable netledPi
Creating init scripts for actledPi is left as an exercise for the reader ;-)