Add services management

cf : #14 
That's a point clearly.

On the other hand, we have a real need to limit the dependencies of the project: we want to install it as a Debian package, so we need to narrow the number of dependencies we will need to package ourselves. So sometimes it may be better to have a code a bit rough but simple and under control than to pull in a big lib that can create some broken deps in the future.

I'm not saying that this is the case for sure here, just adding this point to the reflexion :)

But for now, yeah, let's see what kind of cleaner options we have. :)