Smile: add smartmeter device for P1, various improvements, bugfix
All changes:
- Smile P1 - create an additional P1 device, representing the smartmeter
- Change all gateway model names to Gateway
- Change Anna Smile name to Smile Anna, Anna model name to ThermoTouch
- Change P1 Smile name to Smile P1
- Remove raise error-message, change priority of logger messages to less critical
- Fix for issue #213