The first version `0.1.0-rc.0` and metadata for `cargo-deb` is now in
`Cargo.toml`. For that, the service file as well as the config file
were moved.
For a improved systemd service file the `User` and `Group` is now set
via variables and the log level is now set to `info`. In the previous
version of the service file the parameter for `ExecStart` was missing
which prevented this file from working.
The dependencies in `Cargo.lock` were updated.
