* Add Wifi manager web portal for ESP8266
#15#83
* represent web page if MQTT failures at start
* add arduinojson library on CI and repo
* add parameter in test config for CI and correct ifdef
* add wifi manager library
* add possibility to manual setup esp8266 wifi credential
* add mqtt user and password into wifimanager
* Add MinimumWifiSignalQuality parameter
Following @ctripodi suggestion to remove AP with low signal quality