Updated to recent library/SDK versions
-Arduino core for ESP8266 2.5.0
-ArtnetWifi 1.2.2
-PubSubClient 2.7
-WebSockets 2.1.1
-WiFiManager 0.14
-ArduinoJson 6.10.1
-IRremoteESP8266 2.5.6
-FastLED 3.2.6
Plus some minor enhancements like MQTT support, refreshing of LEDs if turned off (prevent glowing LEDs activated by interference), smooth fading to set brightness, storing and reactivating last mode on powerloss, automatic reset after timeout if WiFi AP cannot be found.