BREAKING CHANGE if component is configured using Integrations UI.

Due to addition of a new sensor, the component will fail to load after a HomeAssistant restart.
To fix:

1. Restart HomeAssistant
2. remove and re-add the integration from the Integrations UI

NEW

1. License monitoring - new sensor (addresses half of #7)
2. Snapshot create/remove services (see README for usage examples)
3. Persistent notifications when service commands are complete