* Added min and Events sensor types to prometheus
* Updated prometheus client and fixed invalid swith state
* Added metric to count number of times an automation is triggered
* Removed assumption that may not apply to everybody
* Fixed tests
* Updated requirements_test_all
* Fixed unit tests
Prometheus (https://prometheus.io/) is an open source metric and alerting
system. This adds support for exporting some metrics to Prometheus, using
its Python client library.
