Validate ObjectPath before use in Conn.GetUnitProperties
Fixes issue #13.
Add a unit test to check GetUnitProperties rejects invalid units.
Fix TestBasicSetActions.
Merge pull request #25 from jqln-0/master

Validate ObjectPath before use in Conn.GetUnitProperties
feat(Reload): Implement daemon-reload over dbus
Merge pull request #26 from bcwaldon/dbus-reload

feat(Reload): Implement daemon-reload over dbus
Implement DisableUnitFiles
Reload() as described by upstream does not work