Better sync management for ESP8266
- BugFix: Fixed event triggering
- Added WifiConfig.h so example compilation works without needing to add your own file.
- Force sync trigger in case of time zone or daylight saving change
- BugFix: Time was not kept if NTP server was not reachable.
- BugFix: Time zone change is possible even if offline
- Improve ESP8266 example