Alerting subsystem - allow things to trigger/clear alerts: * Display stopped refreshing (dead battery/turned off/etc) * Battery low (also maybe render a screen at a certain threshold so it's obvious) * Repeated failure to refresh (see #28 ) * New display connected * User-related stuff, maybe * Failed rendering Render alerts on display list/in admin, and option to use smtp to send emails
Alerting subsystem - allow things to trigger/clear alerts:
Render alerts on display list/in admin, and option to use smtp to send emails