#fixes #132 - added systemd stuff

[KarmaPenny]

added an install_service script that creates a systemd service config for ace.

after running the install script you can start and stop all configured engines of ace by running:

sudo systemctl start ace
sudo systemctl stop ace

Enable and disable starting ace on boot with:

sudo systemctl enable ace
sudo systemctl disable ace

You can change what engines are started by the ace service by editing the etc/startupd file. You can also optionally start the api and gui. Note: the startupd file is a symlink so you can create custom startupd configs and ignore them in git

You can also run the ace service directly in the console:

./aced

pressing ctrl+c will stop the service in the console