Improve restarting of services
Add Service.call method
Fix tests
Rework the Service.call method, add tests and fix SystemdService#restart
Add comments about error logging
Add params comment
Ensure Service#call returns the original command result
Add test example for unknown service name in Service.call
Update changes and version to 3.1.74
Merge pull request #242 from vmoravec/fix-restart

Add Service.call method and improve restarting of services