Make Upstart/Systemctl Service

[Hikari9]

Consider adding this comfortable-swipe as an upstart service.

This is preferred over a local startup application since touchpad gestures are semantically fitting to be called a service. Furthermore, the methods such as start and stop are standard commands usually found in services.

This also bypasses the input device permissions required by libinput-debug-gestures, since service daemons would already be handled as a superuser.