Support systemd service file

I create a script to generate systemd service file and create it when run ```make``` command.
And, I add lines to spec file to install the service file.
You mean that I should install like following commands to %install section. Right ?
```
install -D -m 755 %{_datadir}/hatohol/hatohol.centos /etc/init.d/hatohol
install -D -m 644 %{_datadir}/hatohol/hatohol.service %{_unitdir}
```