* Add module support & modularize existing query
This creates a base to expose more features on the supported devices.
At the moment, the most visible change is that each update cycle gets information from all available modules:
* Basic system info
* Cloud (new)
* Countdown (new)
* Antitheft (new)
* Schedule (new)
* Time (existing, implements the time/timezone handling)
* Emeter (existing, partially separated from smartdevice)
* Fix imports
* Fix linting
* Use device host instead of alias in module repr
* Add property to list available modules, print them in cli state report
* usage: fix the get_realtime query
* separate usage from schedule to avoid multi-inheritance
* Fix module querying
* Add is_supported property to modules
